High-performing billing partners provide full-service billing for primary care, family medicine, and internal medicine practices — accurate E&M coding, Annual Wellness Visit billing, Chronic Care Management, and complete AR management. Most primary care practices are leaving 15–25% of Medicare revenue unbilled through missed AWV and CCM codes alone.
Primary care billing requires mastery of E&M documentation under the 2021 AMA guidelines, plus specialized knowledge of Medicare-only codes that most generalist billers miss entirely — Annual Wellness Visits (G0438/G0439), Chronic Care Management (99490/99491), Transitional Care Management (99495/99496), and Advance Care Planning (99497). A typical 3-physician primary care practice billing these codes correctly adds $8,000–$15,000 per month in legitimate Medicare revenue that they were previously leaving unbilled.
Medicare-covered preventive visit. Distinct from E&M. Can be billed same day as E&M with modifier -25. Fewer than 40% of eligible visits are billed with G0438/G0439 — most are incorrectly billed as office visits.
For Medicare patients with 2+ chronic conditions. 20 minutes of care management per calendar month. Fewer than 20% of eligible primary care practices bill CCM — the remaining 80% leave an average of $10,000+/month unbilled.
Post-hospital discharge follow-up within 14 days (99495) or 7 days (99496). Requires contact attempt within 2 business days of discharge. Significantly higher RVU value than a standard office visit for the same time.
Billable for face-to-face discussions of advance directives. Can be billed same day as E&M or AWV. Waived Medicare cost-sharing when billed with AWV. Rarely billed despite being widely performed.
Post-2021 E&M revision, MDM complexity now drives code selection. Many practices default to 99213 out of habit when the documented MDM clearly supports 99214. Audit of 100 charts typically finds 30–40% undercoded.
2021 AMA E&M guidelines applied correctly — MDM-based and time-based coding. Regular E&M audits to identify undercoding patterns without creating overcoding risk.
AWV (G0438/G0439), IPPE (G0402), depression screening (G0444), alcohol screening (G0442), and all Medicare preventive service codes billed correctly and completely.
Chronic Care Management (99490/99491), Remote Patient Monitoring (99453/99454/99457), and Principal Care Management (99424/99425) — the fastest-growing revenue opportunity in primary care.
Complex same-day billing rules — AWV + E&M, preventive + problem-focused, multiple problems in one visit — applied correctly to maximize revenue without triggering payer edits.
In-office procedure billing — EKG, spirometry, wound care, skin procedures — plus lab service billing under the CLIA waiver or PPM certificate your practice holds.
High-volume primary care patient billing with automated statements, payment plan setup, and professional collections for deductible and copay balances.
Primary care revenue leaks aren't caused by billing errors in the traditional sense — the claims submit cleanly and pay. The problem is that the wrong codes are being billed, or valid codes aren't being billed at all, and the practice never gets a denial that signals the problem. These are the five patterns where primary care practices consistently leave legitimate revenue uncollected.
When a Medicare patient comes in for their annual wellness visit, the correct billing code is G0438 (first AWV) or G0439 (subsequent AWV) — not 99213 or 99214. AWV codes pay $175–$250 and have no patient cost-sharing. Office visit codes pay $100–$150 and come with a copay. Practices that habitually bill office visits for wellness appointments are simultaneously collecting less money and charging the patient more than Medicare intended. In a practice with 300 active Medicare patients, this single coding error costs $22,000–$36,000 per year in foregone revenue.
CCM (99490/99491) is billable for any Medicare patient with two or more chronic conditions expected to last at least 12 months — hypertension, diabetes, depression, COPD. The threshold is low enough that 60–80% of a typical primary care Medicare panel qualifies. The billing requirement is 20 minutes of documented care management work per calendar month, which clinical staff are already performing. Fewer than 20% of eligible primary care practices actually bill CCM. The remaining 80% are providing the service and absorbing the cost without collecting the revenue.
Since the 2021 AMA E&M revision, code selection is based on medical decision making (MDM) complexity or total time — not history and physical exam bullets. A visit managing a patient with Type 2 diabetes, hypertension, and depression with prescription drug management now reliably supports 99214 under the new MDM criteria, even if the note doesn't have five ROS items. Practices that haven't retrained providers on the 2021 guidelines routinely use 99213 for visits that qualify as 99214 — a $40–$65 underbilling per visit that compounds across hundreds of weekly encounters.
TCM (99495/99496) pays $165–$235 for post-discharge follow-up within 14 days (99495) or 7 days (99496) of a hospital, SNF, or observation discharge. It requires a contact attempt within 2 business days and a face-to-face visit within the applicable timeframe. Primary care practices that see discharged patients for follow-up are performing TCM-qualifying work for every one of those visits — but billing a standard office visit instead. In a practice seeing 8–10 post-discharge patients per month, this error leaves $1,320–$2,350/month uncollected every month.
ACP (99497/99498) is billable for face-to-face discussions about advance directives, health care proxies, and end-of-life planning. These conversations happen in primary care routinely — especially with elderly Medicare patients — but are almost never billed. ACP pays approximately $86 for the first 30 minutes and can be billed on the same day as an office visit or AWV. Medicare even waives the patient cost-sharing when billed with the AWV. For a practice having 5 qualifying ACP conversations per week, that's approximately $22,000 per year in documented but unbilled revenue.
Written & Reviewed By
Ajay — CEO, Aayur Solutions
Nearly two decades in US medical billing and revenue cycle management across DME, behavioral health, dental, pain management, and multi-specialty practices. Founder of the American Billing Association resource hub.
A free billing audit identifies your missed AWV, CCM, and E&M coding opportunities — and calculates exactly how much additional revenue is available from work you're already doing.