RCM Xpert provides internal medicine billing services for internists, adult primary care groups and hospitalists in all 50 states, from Flushing, New York.
Specialized internal medicine billing services for practices that bill high-complexity visits, monthly care management, Medicare wellness visits and hospital rounds, coded to the documentation and followed until paid.
HIPAA protected. No obligation.
Internal medicine billing is the coding, claim submission and payment follow-up for internists who treat adults with several chronic conditions at once, where payment depends on E/M complexity, monthly care management time, Medicare preventive rules and diagnosis coding that drives risk adjustment.
A typical internal medicine patient arrives with hypertension, type 2 diabetes and chronic kidney disease at the same visit, and many are covered by Medicare or Medicare Advantage. That combination is where general billing teams lose money: E/M levels coded below what the note supports, care management months never billed, wellness visits billed as routine physicals and diagnoses too vague for risk adjustment.
RCM Xpert codes each internal medicine visit from the documented medical decision making and time, so the E/M level, add-on codes and diagnoses on the claim match the chart.
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Internal medicine claims are usually denied for seven reasons: unsupported E/M levels, modifier 25 errors, incomplete care management records, unspecified diagnoses, missing medical necessity for tests, NP and PA billing errors, and coverage changes found after the visit.
Payers and auditors focus on level 4 and level 5 office visits, the highest-paying internal medicine claims. Under the 2021 AMA office E/M guidelines, the level must match the medical decision making in the note or the total time spent on the date of service. RCM Xpert compares each high-level visit with its documentation before submission and sends the physician a specific question when the note falls short.
A problem-oriented visit on the same day as an Annual Wellness Visit, preventive exam, injection or minor procedure needs modifier 25 and a separately documented problem. Leaving the modifier off loses the visit payment, and using it without a distinct problem invites recoupment. Our coders add modifier 25 only when the note shows a significant, separately identifiable problem.
Chronic care management and principal care management claims fail without documented patient consent, a care plan and monthly minutes. Only one practitioner can bill chronic care management for a patient in a calendar month, so a specialist who bills first can block your claim. We confirm consent, the care plan and the minutes before every care management claim is sent.
Unspecified codes such as type 2 diabetes without complications or unspecified heart failure are often used when the chart supports far more detail. ICD-10-CM combination codes for hypertension with chronic kidney disease, or diabetes with its complications, are missed just as often. Unspecified codes weaken medical necessity and understate risk for Medicare Advantage patients, so we code to the highest specificity the record supports.
In-office labs, ECGs and spirometry need a diagnosis covered by the national or local coverage determination. When Medicare is likely to deny a test, a signed Advance Beneficiary Notice and modifier GA preserve the right to bill the patient, and CLIA-waived tests also need modifier QW. We check every test line against its coverage policy before the claim leaves.
Medicare pays incident-to services at 100% of the physician fee schedule only when its rules are met: an established patient, a physician plan of care and direct supervision. Nurse practitioners and physician assistants billing under their own NPI are paid at 85%. Billing under the wrong NPI creates an overpayment, so we check the rendering provider on every claim.
Patients switch Medicare Advantage plans, lose Medicaid coverage or add a secondary payer between visits. Real-time eligibility checks through 270 and 271 electronic transactions catch these changes before the patient is seen, which is why our team checks coverage before every scheduled visit.
Send us your recent internal medicine claims. We will show you your E/M level pattern, your denial reasons by payer and the care management time that was never billed.
Get My Free Billing AuditRCM Xpert provides medical billing services for internal medicine from the first eligibility check to the final payment, and practices can outsource the full cycle or only the steps their staff cannot keep up with.
Coverage, plan type, copay and deductible confirmed before each visit, including Medicare Advantage switches and secondary payers that cause denials when they surface later.
eligibility checks before every visit →Requests for advanced imaging, specialty drugs and procedures sent with the clinical notes each payer asks for, then tracked until the approval is in hand.
prior authorization for internal medicine →Office visits, care management minutes, add-on codes and in-office tests entered with the correct rendering provider, place of service and date.
internal medicine charge entry →E/M, care management, preventive and diagnosis coding by certified coders who code from the note in front of them, not from a superbill habit.
certified medical coding →Every claim checked against NCCI edits, coverage policies and payer rules before it is sent electronically on the 837P.
Each remittance posted and compared with the expected payment, so underpaid E/M and care management claims are caught and appealed.
payment posting →Denials worked by root cause and appealed with the documentation and policy citation the payer needs to reverse them.
internal medicine denial management →Open claims followed by payer and age, so no balance slips past a timely filing limit.
A/R recovery →Clear statements, payment plans and answers to patient questions, including cost sharing for preventive and care management services.
patient billing →Payer enrollment for physicians, nurse practitioners and physician assistants with Medicare, Medicaid and commercial plans.
provider credentialing →Quality, cost and improvement activity reporting for the Merit-based Incentive Payment System, tracked against the 75-point threshold.
MIPS reporting →Internal medicine E/M visits are coded from medical decision making or total time on the date of service, and complex adult patients often support level 4 and level 5 visits when the record shows it.
Medical decision making has three elements: the number and complexity of problems addressed, the data reviewed and analyzed, and the risk of patient management. Two of the three elements set the level. Total time counts all of the physician's time on the visit date, including chart review, ordering and documentation. A level 5 established patient visit (99215) needs high-complexity decision making or at least 40 minutes.
G2211 is a Medicare add-on for office and outpatient E/M visits where the practice is the continuing focal point for the patient's care or manages a single serious or complex condition over time. Since 2025 it can be billed when the E/M carries modifier 25 alongside an Annual Wellness Visit, vaccine or Medicare Part B preventive service, and for 2026 CMS extended it to home and residence visits.
Longer visits add prolonged service codes, and the start times differ by payer. With a 99215, CPT 99417 is reported from 55 minutes for most commercial payers, while Medicare's G2212 starts at 69 minutes.
In hospitals and other facility settings, a visit shared by a physician and an NP or PA is billed by whoever performed the substantive portion, with modifier FS. In the office, incident-to rules decide whether a visit bills under the physician or the NP or PA. From 2026, Medicare permanently allows direct supervision through real-time audio and video.
Internists and hospitalists bill initial hospital care, subsequent hospital care, same-day admission and discharge, and discharge day management from one code family listed in the table below. Since 2023 observation stays use the same codes, so the setting and the billing physician's role must be right on every hospital claim.
| Service | Codes | Key rule |
|---|---|---|
| Office visit, new patient | 99202 to 99205 | Medical decision making or total time |
| Office visit, established patient | 99211 to 99215 | 99215: high-complexity MDM or at least 40 minutes |
| Medicare complexity add-on | G2211 | Longitudinal care; home and residence visits added for 2026 |
| Prolonged services with 99215 | 99417 (CPT) · G2212 (Medicare) | From 55 minutes · from 69 minutes |
| Hospital inpatient or observation care | 99221 to 99223 · 99231 to 99233 | Initial care · subsequent care |
| Same-day admission and discharge | 99234 to 99236 | Admission and discharge on one date |
| Discharge day management | 99238 · 99239 | 30 minutes or less · more than 30 minutes |
| Shared visit in a facility | Modifier FS | Billed by the practitioner who did the substantive portion |
Our coders review every level 4 and level 5 visit against its documented decision making or time before the claim leaves, so supported visits are paid at the level earned and unsupported ones never reach an auditor.
Chronic care management pays internal medicine practices for the work between visits, and Medicare offers three program types: CCM for two or more chronic conditions, PCM for one high-risk condition, and APCM, which bills a monthly bundle without time thresholds.
Chronic care management covers patients with two or more chronic conditions expected to last at least 12 months, or until death, that place them at significant risk. The practice needs documented consent, a comprehensive care plan, round-the-clock access to care and continuity with a designated care team member. Clinical staff time is billed in 20-minute increments, physician time in 30-minute increments, and complex CCM covers patients whose care plan needs substantial revision. Only one practitioner bills CCM for a patient each month.
Principal care management covers one complex chronic condition expected to last at least three months that needs disease-specific management. Internists often use PCM when they actively manage one serious condition, such as uncontrolled diabetes or heart failure, while the patient's other conditions are stable. PCM is billed in 30-minute increments of physician or clinical staff time.
Advanced primary care management, billed with G0556, G0557 and G0558 since 1 January 2025, pays a monthly amount set by patient complexity: one or fewer chronic conditions, two or more, or two or more for a Qualified Medicare Beneficiary. APCM has no minimum minutes, consent is documented once, and the practice must meet APCM capability requirements. APCM, CCM and TCM are not billed by the same practitioner for the same patient in the same month, and APCM replaces PCM for that patient. For 2026, CMS added G0568, G0569 and G0570 as add-ons when behavioral health integration or collaborative care is delivered alongside APCM.
| Program | Codes | Time or basis |
|---|---|---|
| CCM, clinical staff | 99490 · 99439 | First 20 minutes · each additional 20 minutes |
| CCM, physician or qualified practitioner | 99491 · 99437 | First 30 minutes · each additional 30 minutes |
| Complex CCM | 99487 · 99489 | First 60 minutes · each additional 30 minutes |
| PCM, physician or qualified practitioner | 99424 · 99425 | First 30 minutes · each additional 30 minutes |
| PCM, clinical staff | 99426 · 99427 | First 30 minutes · each additional 30 minutes |
| APCM | G0556 · G0557 · G0558 | Monthly, by patient complexity; no time threshold |
| APCM behavioral health add-ons (2026) | G0568 · G0569 · G0570 | With behavioral health integration or collaborative care |
RCM Xpert reviews each care-managed patient every month and bills the program the documentation supports, so care management time is never left unbilled and no patient is billed under two programs in the same month.
Medicare does not pay for a routine annual physical, so internal medicine practices bill Medicare patients an Annual Wellness Visit and bill commercial patients the age-based preventive medicine codes.
The Initial Preventive Physical Exam is available once, within the first 12 months of Part B coverage. The Annual Wellness Visit follows, once every 12 months, with no deductible or coinsurance for the patient. Advance care planning done during the wellness visit carries modifier 33 so the patient pays nothing for it. When the physician also treats a new or worsening problem at the same visit, the problem-oriented E/M is billed with modifier 25 and may carry its own cost sharing.
| Service | Codes | Rule |
|---|---|---|
| Initial Preventive Physical Exam | G0402 | Once, within 12 months of Part B enrollment |
| Annual Wellness Visit | G0438 (initial) · G0439 (subsequent) | Once every 12 months; no cost sharing |
| Advance care planning | 99497 · 99498 | Modifier 33 when done with the wellness visit |
| Commercial adult preventive visit | 99385 to 99387 (new) · 99395 to 99397 (established) | By age: 18 to 39, 40 to 64, 65 and older |
| Screening and counseling | G0444 · G0442 · G0443 · G0446 · G0447 | Depression · alcohol screening and counseling · cardiovascular · obesity |
| Vaccine administration | G0008 · G0009 (Medicare) · 90471 · 90472 (CPT) | Influenza · pneumococcal · other vaccines |
Diagnosis codes decide medical necessity on every internal medicine claim, and for Medicare Advantage patients they also set the risk score that determines how much the plan is paid for the year.
ICD-10-CM rewards specificity. The coding guidelines presume a link between hypertension and heart disease, and between hypertension and chronic kidney disease, so those conditions are coded with combination codes rather than separately. The word "with" links diabetes to its complications in the same way. Chronic kidney disease needs its stage, heart failure its type and acuity, and atrial fibrillation its pattern.
For 2026, CMS calculates Medicare Advantage risk scores entirely with the 2024 CMS-HCC model, known as V28, which finished its three-year phase-in this year. A chronic condition counts toward risk adjustment only when a provider documents and addresses it during the year, a requirement many practices check with the MEAT standard: monitor, evaluate, assess, treat.
| Condition | Codes | Specificity rule |
|---|---|---|
| Hypertension | I10 · I11.- · I12.- · I13.- | Use I11 or I12 when heart disease or CKD coexists |
| Type 2 diabetes | E11.- with Z79.4, Z79.84 or Z79.85 | Code each complication; add long-term drug use |
| Chronic kidney disease | N18.1 to N18.6 (N18.30 to N18.32) | Stage required; stage 3a and 3b coded separately |
| Heart failure | I50.2- to I50.4- | Type and acuity instead of I50.9 |
| COPD | J44.0 · J44.1 · J44.9 | Infection or exacerbation changes the code |
| Hyperlipidemia | E78.00 to E78.5 | Type when documented |
| Atrial fibrillation | I48.0 to I48.91 | Paroxysmal, persistent or permanent |
RCM Xpert flags unspecified codes and chronic conditions not yet documented this year, and returns them to the provider as questions, never as suggested diagnoses. Every code we report comes from the provider's own documentation, because risk adjustment accuracy is an enforcement priority for the HHS Office of Inspector General.
Internal medicine medical billing runs mostly through Medicare, Medicare Advantage, Medicaid and commercial plans, and each follows its own coverage rules on top of federal billing law.
For 2026, the Medicare Physician Fee Schedule conversion factor is $33.4009, or $33.5675 for qualifying APM participants. A 2.5% efficiency adjustment cut payment for many procedures and tests, but E/M visits and care management codes were excluded because they are time-based.
Plans add their own prior authorization lists and referral rules, and they depend on accurate diagnosis coding for risk adjustment.
Each state sets its own coverage, prior authorization and filing rules for adult services.
UnitedHealthcare, Aetna, Cigna, Blue Cross Blue Shield plans and Humana each publish policies on modifier 25, preventive visits and telehealth that differ from Medicare.
Medicare telehealth flexibilities, including care delivered to patients at home, are extended through 31 December 2027 under the Consolidated Appropriations Act, 2026.
Internal medicine billing must follow HIPAA, NCCI edits, national and local coverage determinations, Advance Beneficiary Notice rules, incident-to rules and the False Claims Act. The Merit-based Incentive Payment System performance threshold is 75 points for 2026 through 2028.
Every RCM Xpert claim is checked against NCCI edits and the payer's coverage policy before submission, and internal medicine claims are audited against the chart on a regular schedule so documentation gaps are fixed before a payer finds them.
RCM Xpert works inside the EHR and practice management system your internal medicine practice already uses, so outsourcing billing does not mean changing software or retraining clinical staff.
Claims leave your system through your clearinghouse as 837P files, and electronic remittances (835 ERAs) post back into the same system, so your team sees every claim status in software it already knows. Care management minutes and wellness visit due dates are captured from the records your providers already keep.
We work under a signed HIPAA Business Associate Agreement, with user accounts your practice creates for us and removes when the engagement ends.
RCM Xpert bills internal medicine claims in all 50 states, and each state changes two things on every claim: the Medicare Administrative Contractor that processes Part B and the Medicaid program that covers low-income and dual-eligible adults.
Noridian processes Medicare claims in Jurisdiction E, and Medi-Cal managed care plans cover most Medicaid adults.
California medical billing →Novitas processes Medicare claims in Jurisdiction H, and STAR+PLUS covers adults with disabilities and older Texans on Medicaid.
Texas medical billing →First Coast processes Medicare claims in Jurisdiction N, and Statewide Medicaid Managed Care plans cover most Medicaid adults.
Florida medical billing →National Government Services processes Medicare claims in Jurisdiction K, and Medicaid managed care plans cover most adult enrollees.
New York medical billing →Novitas processes Medicare claims in Jurisdiction L, and Community HealthChoices covers older adults and dual-eligible patients.
National Government Services processes Medicare claims in Jurisdiction 6, and HealthChoice Illinois plans cover most Medicaid adults.
CGS processes Medicare claims in Jurisdiction 15, and Ohio Medicaid managed care plans cover most adult enrollees.
Palmetto GBA processes Medicare claims in Jurisdiction J, and Georgia Medicaid covers low-income adults through managed care and fee-for-service.
See every state we serve, with each state's Medicaid program, Medicare contractor and filing limits.
every state we serve →Reporting from your internal medicine billing services should show where revenue comes from and where it leaks, by visit type, care program and payer. Each month, RCM Xpert reports the measures that matter most to an internal medicine practice:
Many internal medicine groups include subspecialists, and our internal medicine billing services cover their procedures and tests under the same account.
Echocardiograms, stress tests, device checks and cardiac monitoring.
cardiology billing →Chronic kidney disease care, dialysis-related visits and monthly ESRD services.
nephrology billing →Diabetes management, continuous glucose monitoring and thyroid care.
endocrinology billing →Colonoscopy, endoscopy and the screening versus diagnostic rules that change patient cost sharing.
gastroenterology billing →Biologic infusions and injections, drug units and step-therapy authorizations.
rheumatology billing →Chemotherapy administration, drug billing and prior authorization.
oncology billing →EEG, EMG, nerve conduction studies and botulinum toxin injections.
neurology billing →Internal medicine practices also bill three Medicare programs that follow patients beyond the office visit: transitional care management after a discharge, remote patient monitoring, and behavioral health integration.
Transitional care management requires interactive contact with the patient within two business days of discharge and a face-to-face visit within 14 days for moderate complexity or 7 days for high complexity. Medications must be reconciled no later than the face-to-face visit, and TCM is billed once in the 30 days after discharge.
Remote patient monitoring pays for device setup, device supply and monthly management time. Two codes are new for 2026: 99445 for device supply when a patient records 2 to 15 days of readings, and 99470 for 10 to 19 minutes of monthly management. Internists use RPM most for hypertension, heart failure and diabetes.
Behavioral health integration and the psychiatric collaborative care model let internists bill for treating depression and anxiety inside the practice. For practices with a dedicated behavioral health service line, see our behavioral health billing services.
behavioral health billing services →| Program | Codes | Key rule |
|---|---|---|
| TCM | 99495 · 99496 | Contact in 2 business days; visit in 14 days (moderate) or 7 days (high) |
| RPM setup and device supply | 99453 · 99454 · 99445 | 99454: 16 to 30 days of readings; 99445: 2 to 15 days |
| RPM management | 99457 · 99458 · 99470 | First 20 minutes · each additional 20 · 10 to 19 minutes |
| BHI and collaborative care | 99484 · 99492 · 99493 · 99494 | General BHI · collaborative care months and add-on time |
Internal medicine billing services are usually priced as a percentage of the payments collected or a fixed fee per claim, and the rate depends on claim volume, payer mix, the share of care management and hospital work, and which services are included. RCM Xpert quotes a rate after reviewing your actual claims in the Free Billing Audit, so the price reflects your practice rather than a generic rate card.
Moving your internal medicine billing to RCM Xpert follows five steps, and claims keep going out the whole time.
We review your recent claims, denials and E/M patterns and show you what we find.
We confirm provider enrollment with Medicare through PECOS, your state Medicaid program and its managed care plans, commercial payers and CAQH.
We connect to your EHR and clearinghouse under a signed Business Associate Agreement.
We bill alongside your current setup until the numbers match, then take over.
You receive your first monthly report by payer, provider and care program.
Internal medicine billing is different because internists treat adults with several chronic conditions at once, so claims depend on high-complexity E/M coding, monthly care management time, Medicare preventive rules and precise diagnosis coding that drives risk adjustment. Most other specialties bill a narrower set of procedures.
A dedicated internal medicine billing partner improves claim accuracy by coding each visit from the documented decision making or time, matching diagnoses to their highest supported specificity, checking modifier 25 and G2211 rules, and scrubbing claims against NCCI edits and payer policies before submission.
Internal medicine practices reduce denials by verifying eligibility before every visit, supporting each E/M level with documented decision making or time, recording consent and minutes for care management, using specific ICD-10 codes, issuing ABNs when Medicare may deny a test, and tracking denial reasons by payer.
Internal medicine billing teams stay compliant by following CMS documentation rules for E/M, care management and incident-to billing, applying NCCI edits and local coverage determinations, issuing ABNs correctly, protecting patient data under HIPAA and auditing a sample of claims against the medical record regularly.
Yes. Outsourcing moves eligibility checks, coding questions, claim follow-up and denial appeals away from physicians and front-desk staff. Physicians still document each visit, but they stop handling payer calls and rework, and the billing team sends back only specific documentation questions tied to a claim.
Useful internal medicine reports show clean claim rate, denial rate by reason and payer, days in A/R, E/M level distribution, care management enrollment and billed months, Annual Wellness Visit completion and chronic conditions documented this year. RCM Xpert reports these to every client each month.
Chronic care management is billed for patients with two or more chronic conditions expected to last at least 12 months. The practice needs documented consent and a care plan, then bills 99490 for the first 20 minutes of clinical staff time each month and 99439 for each additional 20 minutes.
Real-time eligibility verification confirms active coverage, plan type, copay, deductible and authorization needs before the visit through 270 and 271 electronic transactions. It catches Medicare Advantage switches, terminated coverage and secondary payer issues that cause denials, and lets staff collect the correct patient share at check-in.
High-acuity E/M visits are coded from medical decision making or total time on the date of service. A 99215 needs high-complexity decision making or at least 40 minutes, and longer visits add prolonged service codes: 99417 from 55 minutes for most commercial payers and G2212 from 69 minutes for Medicare.
RCM Xpert provides internal medicine billing services for E/M, care management, preventive and hospital work with certified coders, codes every claim from the provider's documentation, reports by payer every month, and starts every engagement with a Free Billing Audit of your recent internal medicine claims.
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