Comprehensive RCM for Internal Medicine.

Internal medicine billing services cover the broadest patient population and the widest code set in outpatient medicine — from annual wellness visits to chronic care management to same-day urgent encounters. Getting each category right requires billing discipline that most practices don’t have the capacity to maintain in-house.

In internal medicine, under-billing is just as common as denials — and just as costly.

The 2021 E/M documentation guideline changes gave internal medicine practices more flexibility in how they support E/M level selection — time or MDM, whichever better reflects the encounter. But many practices haven’t updated their documentation habits to take advantage of the new framework for codes 99202–99215, and as a result they’re systematically under coding complex visits. Meanwhile, Chronic Care Management (99490), Annual Wellness Visits (G0438/G0439), Remote Patient Monitoring (99457/99458), and Transitional Care Management (99495/99496) represent hundreds of thousands in potential annual revenue that most internal medicine practices either don’t bill at all or bill inconsistently. Our full RCM services capture all of it

E/M Leveling Under the 2021 Guidelines

The 2021 CPT revision simplified outpatient E/M coding: Level 3 (99203/99213) maps to low MDM or 30/20 minutes; Level 4 (99204/99214) maps to moderate MDM or 45/25 minutes; Level 5 (99205/99215) maps to high MDM or 60/40 minutes. The new MDM table is cleaner than the 1995/1997 frameworks, but it still requires providers to document the number and complexity of problems, data reviewed, and risk of complications — not just clinical notes. Practices that haven't retrained their providers on the new MDM elements are systematically undercoding Level 4 and Level 5 visits on patients who clearly qualify.

Chronic Care Management (CCM)

CCM is the highest-value underbilled service in most internal medicine practices. Code 99490 covers 20 minutes of clinical staff care management per month for patients with two or more chronic conditions; add-on 99439 covers each additional 20 minutes; 99491 covers 30 minutes of direct physician time for complex patients. A 100-patient CCM program billed consistently can generate $15,000–$20,000 in monthly revenue with no additional in-office visits. The documentation infrastructure — written care plan, 24/7 access, care coordination — requires setup, but we handle the billing framework and monthly tracking.

Annual Wellness Visit vs. Preventive E/M vs. Sick Visit

The AWV (G0438 for the initial visit, G0439 for subsequent years) is a Medicare-only benefit distinct from the traditional preventive physical. It doesn't include a physical exam — it covers health risk assessment and preventive planning. When a patient presents for their AWV and raises a separate complaint, a problem-focused E/M (99212–99215 with modifier -25) can be billed alongside the AWV. When a new patient wants both a preventive physical (99381–99397) and an E/M for an established condition, both are billable with modifier -25 on the E/M. Most practices either don't know the distinction or don't consistently apply modifier -25, losing the problem-focused encounter entirely.

Transitional Care Management and RPM

Transitional Care Management (99495: face-to-face within 14 days post-discharge, moderate complexity; 99496: within 7 days, high complexity) is systematically under billed because it requires contact within two business days of discharge and documentation of care coordination — steps that require a workflow internal medicine practices don't typically have. Remote Patient Monitoring codes 99454 (device supply/monitoring), 99457 (first 20 minutes monthly), and 99458 (each additional 20 minutes) represent a growing revenue opportunity for practices managing hypertension, diabetes, and COPD patients remotely. We build the billing infrastructure for both.

In a high-volume IM clinic, "health" is defined by clean data and automated efficiency. We aim for these benchmarks:

99% First-Pass Clean Claim Rate

Internal medicine claims fail most often on E/M level documentation gaps, missing AWV modifier -25, and CCM documentation deficiencies. We catch all three before the claim reaches the payer.

E/M Optimization Across the Patient Panel

We review a sample of your E/M distribution monthly — comparing your Level 3/4/5 ratio against the MDM complexity of your patient panel. Systematic undercoding is identified and corrected with documentation guidance, not just billing fixes.

CCM and RPM Monthly Revenue Capture

Every eligible patient in your CCM and RPM programs is billed accurately each month. We track care management time, confirm documentation thresholds are met, and file monthly claims on schedule.

A/R Under 30 Days

Internal medicine payer mixes typically include Medicare, Medicaid, Medicare Advantage, and commercial plans — each with different claim requirements. Our 24/7 team works the full mix without pause.

Our Specialized Process

E/M Documentation Review

We review your E/M level distribution monthly and provide documentation guidance when the clinical complexity of your patient panel doesn't match your billing patterns. Systematic undercoding at Level 4 and Level 5 is identified and corrected — not just at onboarding, but as an ongoing process.

CCM/TCM/AWV Program Management

We set up and manage the monthly billing cycle for CCM, TCM, and AWV programs — tracking eligible patients, confirming documentation thresholds, and filing claims on schedule. These programs require billing infrastructure that most internal medicine teams don't have the capacity to build in-house.

Modifier -25 Capture

Every encounter where a preventive service and a problem-focused E/M occur on the same day is reviewed for correct modifier -25 application. No more preventive visit days where the accompanying sick visit revenue disappears.

Split/Shared Visit Management

Tracking of HEDIS and quality measures.

For practices using NPs or PAs, we apply the 2024 split/shared visit rules — substantive portion = majority of total face-to-face time — and document the billing provider correctly on every shared encounter. Incident-to billing rules are applied where appropriate, and compliance risks are managed proactively.

Internal Medicine Ready Integration.

We work inside the EHRs that manage the heavy data of a primary care clinic. Our team is expert-certified in:

eClinicalWorks | Athenahealth | Greenway Health | NextGen | Practice Fusion

Frequently Asked Questins

How do you handle billing when a patient has both a wellness visit and a sick visit?

A Medicare Annual Wellness Visit (G0438/G0439) and a problem-focused E/M can both be billed on the same day. The E/M requires modifier -25 and must be documented as a separately identifiable service beyond the scope of the wellness visit. A standard preventive physical and an E/M for a separate complaint can similarly be billed together with modifier -25. We apply the correct billing structure based on the payer — Medicare AWV rules differ from commercial preventive visit rules.

What's the difference between CCM and TCM billing?

Can you help implement RPM billing for chronic disease patients?

How do you handle incident-to billing for NP and PA services?

What are the Principal Care Management (PCM) codes and how do they differ from CCM?

Is your internal medicine revenue underperforming?

Internal medicine is the backbone of primary care. Your revenue cycle should match the breadth and complexity of what you do every day. Happy Billing’s internal medicine RCM specialists handle E/M leveling, CCM, AWV, RPM, and TCM so your practice captures what it earns — visit by visit, month by month. For practices with overlapping referral networks, explore our Cardiology billing services, Gastroenterology billing services, and Neurology billing services.