Primary care billing is uniquely difficult because it combines the highest patient volume of any specialty with the most complex preventive vs. sick visit billing rules. When a patient comes in for a wellness visit but also discusses a chronic condition, splitting the preventive and problem-oriented services correctly, and applying modifier 25 the right way, is one of the most consistently mishandled billing scenarios in primary care. The result is systematic underbilling or denial across thousands of visits per year.
Primary care medical billing demands real proficiency in preventive vs. sick visit billing, correct modifier 25 usage, Annual Wellness Visit coding (G0438/G0439, paired with ICD-10 codes Z00.00 and Z00.01) versus preventive visit coding (99381–99397), and chronic care management billing (99490, 99491, 99487). Errors in splitting preventive and problem-oriented services, or missed chronic care management time documentation, can cause systematic underbilling across thousands of visits a year, and can prompt coding audits. Our primary care billing track record backs a full support offering: coding education, timely billing updates, and recovery of previously denied claims.
Billed Right has provided primary care billing support since 2006, serving practices across the US from our base in Longwood, Florida.
Common Pain Areas
- Preventive vs. sick visit billing confusion can result in systematic underbilling across thousands of visits per year.
- Modifier 25 misapplication can trigger denials or invite payer audits depending on which way it's wrong.
- Chronic care management billing gaps can leave recurring, reimbursable care coordination time unbilled every month.
- Annual wellness visit vs. preventive visit coding errors can turn a no-cost-share Medicare benefit into a denied or patient-billed claim.
- High claim volume leading to unbilled or delayed services can quietly compound into significant lost revenue.
Primary Care Solutions
- Fast denial management and follow-up on any denied wellness visit, E/M, or chronic care management claim. Once an alert fires, we follow up within 24-48 hours and appeal denied claims on the same timeline.
- Key Performance Indicators (KPI) that show whether your practice is hitting its business objectives.
- We work with all major EMR (electronic medical records)
- Remote login for easy access.
- Quick and smooth transition.
- No negative impact on your daily operation.
- Bilingual representatives are available.
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Top Denial Reasons
Preventive Visit Billed Same Day as E/M Without Modifier 25
Billing a preventive visit alongside an E/M service on the same day without modifier 25 on the E/M line gets that line denied as included in the preventive visit.
AWV Coded as Preventive Visit or Vice Versa
The Medicare Annual Wellness Visit and a standard preventive visit are distinct benefits with different codes, and mixing them up is a routine, avoidable denial.
Chronic Care Management Not Billed Monthly
CCM requires a documented time log each month, and documentation gaps mean reimbursable care coordination time goes unbilled.
E/M Level Not Supported by MDM Documentation
The billed E/M level has to be supported by documented medical decision making, and undocumented complexity gets downcoded or denied.
Same-Day Procedure Not Billed Due to Global Period Confusion
Misreading a procedure's global period can lead to a same-day service being left unbilled when it was actually separately reimbursable.
Payer-Specific Considerations
Medicare covers Annual Wellness Visits (G0438 initial, G0439 subsequent) at no cost share, but these are frequently confused with preventive visits (99381–99397), which do carry cost share under Medicare. Billing one as the other creates either an unnecessary patient bill or a denial. Medicare also covers chronic care management (99490, 99491, 99487) for patients with two or more chronic conditions, but requires documented patient consent and monthly time documentation before it will pay the claim. Commercial payers vary widely on preventive service coverage and cost sharing based on ACA requirements, so the same preventive visit code can be fully covered by one payer and partially cost-shared by another.
What to Expect
Billing Review
We audit recent wellness visit, E/M, preventive service, and chronic care management claims and show you exactly where revenue is leaking.
Onboarding & EHR Setup
Payer setup and integration with your existing EHR/PM system: no rip-and-replace.
Credentialing Check
We verify provider enrollment status and handle re-credentialing if needed.
Claims Submission Begins
Correctly coded claims go out under full account management, same business day.
Denial Monitoring & Appeals
Denials are flagged and appealed within 24–48 hours of the alert.
Monthly Reporting
KPI dashboards show collections, A/R days, and denial trends every month.
Results Reflected in Our KPIs
Our medical billing team keeps claims moving and follows up on rejections so nothing sits stalled. That's how our primary care billing expertise translates into fewer denials and a tighter revenue cycle.
Frequently Asked Questions
Bill the Annual Wellness Visit or preventive visit code (G0438/G0439 or 99381-99397) for the wellness component, and a separate E/M code (99213-99215) for the problem-oriented service, appended with modifier 25 on the E/M code. Documentation has to clearly separate the two services. If the note doesn't distinguish what was addressed for the wellness visit versus the chronic condition, the E/M line gets denied as included in the preventive visit.
Chronic care management (99490, 99491, 99487) requires the patient to have two or more chronic conditions expected to last at least 12 months, documented patient consent, and a minimum amount of non-face-to-face care coordination time logged each month. Missing the consent documentation or the monthly time log is the most common reason CCM claims get denied even when the care was actually provided.
The Medicare Annual Wellness Visit (G0438 for the first visit, G0439 for subsequent visits) is a Medicare-specific benefit focused on a personalized prevention plan, billed with no patient cost share. A preventive visit (99381-99397) is the broader age-based preventive exam most commercial payers cover, and coding one as the other is a routine, avoidable denial.
Modifier 25 is appended to a separately identifiable E/M service performed on the same day as another procedure or preventive visit, and it's only appropriate when the documentation supports a distinct, significant problem addressed beyond the other service. Appending it without clear supporting documentation is one of the most frequently audited billing patterns in primary care.
Medicare covers the Annual Wellness Visit (G0438/G0439) and a defined list of preventive screenings at no cost share, but the standard preventive visit codes (99381-99397) used by commercial payers aren't part of that no-cost list under Medicare. Billing them to Medicare as if they were is a common source of confusion and denials.
Most primary care E/M denials come down to three things: modifier 25 used without supporting documentation, the E/M level billed not matching the documented medical decision making, and wellness or preventive visit codes mixed up with sick-visit codes. Getting all three consistently right across a high patient volume is where most practices lose revenue.
“I have been very happy with Billed Right and have seen a significant increase in collections since switching to them 8 months ago. They are professional, efficient, and respond to all my questions and concerns thoroughly and promptly. I highly recommend them and have referred them to my colleagues.”
More on primary care billing.
Primary Care Coding Updates for 2026: Wellness Visit and CCM Changes
A rundown of the Annual Wellness Visit and chronic care management coding changes primary care practices need to know about this year.
ReadPrimary Care Modifier 25 and Wellness Visit Checklist
A quick self-audit checklist for modifier 25 usage and wellness visit vs. preventive visit coding before you submit a claim.
Get itPrimary Care Practice Reduces Denials and Recovers Lost Revenue
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ReadReady to Strengthen Your Primary Care Revenue Cycle?
Schedule a conversation with our primary care billing team. We will review your current claims, identify where revenue is slipping, and show you exactly what we would do differently.