Internal Medicine Billing Cheat Sheet (2026)
Most internal medicine practices lose money in two places: E/M visits coded a level too low, and the care-management codes they never bill at all. This page covers the 2026 MDM rules, the G2211 visit-complexity add-on, the CCM and TCM timing traps, and what documentation actually defends a 99214.
Quick reference for internal medicine billers. Last updated .
Top Internal Medicine CPT Codes & 2026 Medicare Allowables
| Code | Description | Non-Facility | Facility | Total RVU |
|---|---|---|---|---|
| 99490 | Chronic care management (20+ min/month) | $66.13 | $43.76 | 1.98 |
| 99491 | Complex chronic care management (60+ min) | $89.18 | $65.47 | 2.67 |
| 99497 | Advance care planning (first 30 min) | $86.84 | $65.80 | 2.60 |
| 96127 | Brief emotional/behavioral assessment | $5.01 | $5.01 | 0.15 |
National 2026 Medicare Physician Fee Schedule estimates (total RVU multiplied by the conversion factor). These are adjusted by state locality. See the per-state table on the Internal Medicine billing services page.
Modifiers That Prevent Internal Medicine Denials
A visit-complexity add-on on office E/M for a continuing, longitudinal relationship with a patient's overall care. Bill it on the eligible established-patient visits you already see.
A significant, separately identifiable E/M on the same day as a minor procedure or the Annual Wellness Visit.
A preventive service with the cost share waived under the ACA, which separates a true preventive item from a diagnostic one.
A distinct service unbundled from a same-day procedure when NCCI would otherwise combine them.
A synchronous telehealth E/M. Align it with the payer's post-PHE place-of-service policy.
An unrelated E/M during the global period of a prior minor procedure.
Top Internal Medicine Denials → Quick Fix
Document MDM by the 2021-and-later rules (number and complexity of problems, data reviewed, and risk) or total time including non-face-to-face work on the date of service.
Log 20 minutes or more of non-face-to-face clinical staff time per calendar month against a documented care plan for two or more chronic conditions. 99490 fails without the time log.
Bill G0438 or G0439 with the AWV elements. A routine physical is statutorily non-covered by Medicare, so the two are different services.
Do not append G2211 when modifier 25 is on the same E/M for a same-day procedure. Medicare disallows that combination.
Bill TCM (99495 or 99496) once per 30-day post-discharge period, with the interactive contact within 2 business days and the face-to-face visit within 7 or 14 days.
NCCI Bundling Watch-Outs
Code pairs from this specialty's set that carry NCCI edits. Billing both without a justified modifier triggers a bundling denial.
| Code | Bundles With | Rationale |
|---|---|---|
| 99490 | 0362T | Misuse of Column Two code with Column One code |
| 99490 | 0373T | Misuse of Column Two code with Column One code |
| 99491 | 0362T | Misuse of Column Two code with Column One code |
| 99491 | 0373T | Misuse of Column Two code with Column One code |
| 99497 | 0362T | Misuse of Column Two code with Column One code |
| 99497 | 0373T | Misuse of Column Two code with Column One code |
| 96127 | 36591 | CPT Manual or CMS manual coding instruction |
| 96127 | 36592 | CPT Manual or CMS manual coding instruction |
Documentation That Holds Up on Appeal
MDM elements, or total time on the date of service including chart review, orders, and documentation. Pick one method and support it fully.
An electronic care plan, two or more chronic conditions, patient consent, and a monthly log of clinical staff minutes.
A health risk assessment, problem list, and screening schedule. G0438 is the first AWV and G0439 each subsequent year.
The discharge date, the 2-business-day interactive contact, medication reconciliation, and the face-to-face date.
The continuing-care relationship rationale in the note. It is not automatic on every visit.
Revenue Internal Medicine Practices Leave on the Table
Never enrolling eligible patients in CCM (99490 or 99491), which is recurring monthly revenue most internal medicine panels qualify for.
Omitting G2211 on the longitudinal established-patient visits you already bill. It is added revenue for work already done.
Billing a covered AWV as a non-covered physical and writing off the difference.
Missing the same-day AWV plus problem-oriented E/M, with modifier 25, when both are documented.
Internal Medicine Billing FAQ
Time or MDM for E/M leveling in 2026?
Either. Choose the method that best reflects the visit. Time now includes non-face-to-face work on the date of service such as chart review, orders, and documentation, which often supports a higher level than face-to-face alone.
When can I bill G2211?
On an office or outpatient E/M when you are the continuing focal point for the patient's overall care. Do not bill it with modifier 25 on the same E/M for a same-day procedure.
What makes CCM (99490) audit-proof?
Patient consent, two or more chronic conditions expected to last 12 months or longer, an electronic care plan, and a monthly log proving 20 minutes or more of clinical staff time.
Does AWV versus annual physical matter for denials?
Yes. Medicare covers the AWV (G0438 or G0439) but statutorily excludes a routine physical. Billing the physical code yields a non-covered denial.
Stop Losing Internal Medicine Revenue to Preventable Denials
Our AAPC-certified internal medicine coders apply every rule on this sheet to your claims. Call 888-701-6090 for a free billing assessment.