Most billing problems announce themselves. A claim gets denied. A payment is delayed. An EOB comes back with a rejection code that requires follow-up.

The billing problem we see most often in established NP-owned practices does none of those things. It simply pays less than it should — quietly, consistently, at scale — and most practice owners never notice.

What Automatic Downcoding Is

Evaluation and Management (E&M) codes determine how a primary care visit is reimbursed. A 99215 — a high-complexity visit — reimburses at a meaningfully higher rate than a 99214 or 99213. The difference between a correctly coded 99215 and a 99213 can be $40 to $60 per visit on Medicare rates, more on commercial.

Some payers have implemented internal algorithms that automatically reduce the level of E&M code they pay out — regardless of what was submitted. No formal denial. No peer-to-peer review request. No explanation in the remittance. The claim comes back processed, the payment arrives, and the only signal that something is wrong is that the amount is lower than it should be.

In some cases the CPT code on the remittance doesn't change at all. The payer pays a 99214 rate against a submitted 99215 without noting the discrepancy. If you are not comparing expected reimbursement to actual payment line by line, you will not catch it.

Why Primary Care Is Especially Exposed

The complexity of a primary care visit is often invisible on a claim. A visit documented as a chief complaint of fatigue may also involve reviewing a month of glucose logs, adjusting an insulin regimen, monitoring a patient's CKD progression, reconciling five medications, and coordinating with a specialist. That visit legitimately supports a 99215. But if the documentation does not explicitly reflect that complexity in terms of Medical Decision Making — the problems addressed, the data reviewed, the risk of the management plan — it looks like a simple visit to a payer's algorithm.

This is not a documentation problem unique to NPs. It is endemic to primary care, where the work is relational and longitudinal in ways that fee-for-service coding was never designed to capture. But it is a problem that compounds at scale. A practice seeing 300 patients a week, with even 15% of high-complexity visits quietly downgraded, is losing meaningful revenue every month — revenue that represents care that was already delivered.

What the Pattern Looks Like in Practice

When we conduct billing audits for practices joining Duet's network, we look specifically for three patterns that indicate systematic underpayment rather than isolated errors.

Consistent downcode by payer. If a practice's 99215 acceptance rate is 70% with one commercial carrier and 30% with another, that is not a documentation problem — it is a payer behavior worth investigating. Payers vary significantly in how aggressively they apply internal downcode algorithms, and identifying which carriers are doing it is the first step toward addressing it.

Missed add-on codes. G2211 — the complexity add-on for longitudinal primary care relationships with Medicare patients — was introduced specifically to compensate primary care providers for the ongoing management work that a single visit code doesn't capture. Its adoption among NP-owned practices remains low, partly because documentation requirements are not widely understood and partly because some payers have been inconsistent in applying it. AWVs, CCM, and transitional care management codes carry similar patterns: billable, reimbursable, and frequently missed.

Time-based coding underutilization. When a visit's total time — including pre-visit chart review and post-visit documentation — exceeds the threshold for a higher E&M level, time-based coding can justify a code that MDM alone might not. Many practices default to MDM-based coding for every visit without considering whether time-based coding would better represent the work performed.

What Practices That Stay Ahead of This Do Differently

The practices in our network that maintain the strongest billing performance share a consistent set of habits.

They document Medical Decision Making explicitly — not as a narrative afterthought, but as a structured component of every note. The problems addressed, the data reviewed, the risk level of the management plan. These are the elements payer algorithms and auditors look at. They need to be present and clear.

They code every condition addressed in the visit, not just the headline complaint. A visit for a diabetic patient that also involves blood pressure management, medication reconciliation, and a depression screen is not a diabetes visit. It is a complex visit involving multiple chronic conditions, and the documentation should reflect that.

They audit remittances regularly — not just denials. A claim that paid is not necessarily a claim that paid correctly. Comparing expected reimbursement to actual payment by CPT code and by payer, on a monthly basis, surfaces the systematic patterns that isolated claim review will not.

And they treat patterns as payer behavior to push back on, not as fixed realities to absorb. When a carrier is consistently downgrading a specific code category without clinical justification, that is a contracting conversation — not just a billing one.

The Revenue Is Already There

The visits have been seen. The care has been delivered. The documentation, with some discipline, can accurately reflect the complexity of what happened in the room.

The gap between what NP-owned primary care practices are paid and what they are owed is not primarily a function of the 85% Medicare rule or payer hostility. A significant portion of it is recoverable — through coding accuracy, documentation discipline, denial management, and a systematic look at what the remittances actually show.

Duet conducts billing audits for NP-owned practices and works with established practices to close the gap between what's being billed and what's being collected. Talk to a Duet advisor about what a billing review would find in your practice →