Your E/M bell curve: how payers profile a solo practice
Summary
Payers compare each clinician's mix of E/M levels — how often a solo bills 99212 through 99215 — against a specialty-wide curve, and a distribution clustered heavily at 99214 and 99215 with few or no lower-level visits is what an automated profiling program flags, not any single claim. The flag only triggers a closer look, usually a records request; whether it becomes a real problem depends entirely on whether the medical decision making or time documented actually supports each level billed.
By Gale Editorial · Updated 2026-07-26. Every figure cited to a dated source. How we write.
What does 'E/M level distribution' actually mean, and what's normal?
An E/M level distribution is the spread of CPT codes a clinician bills across a set of visits — for an established-patient office visit, that means the mix of 99212, 99213, 99214, and 99215 over some period, usually a rolling year. Under the 2021-and-later framework, each of those levels is set by the medical decision making involved or by total time, not by how much history or exam gets documented 1Ref 1Centers for Medicare & Medicaid Services (2023).Evaluation and Management Services Guide.That E/M office-visit levels are selected by medical decision making or total time under the 2021+ framework and what must be documented — the basis for what a normal distribution reflects and what a records request checks.2Ref 2American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA's 2021 E/M revisions eliminated history and exam as level-setting elements for office visits in favor of MDM or time — explains why distributions legitimately shifted after 2021..
A normal solo practice curve, across most specialties, sits with the bulk of visits at 99213 and 99214, a smaller share at 99215, and at least some visits at 99212 for genuinely brief, low-complexity encounters. What draws attention is not any particular level being billed — every one of those codes is legitimate — but a curve that has shifted almost entirely to 99214 and 99215 with 99212 and 99213 nearly absent. The line between 99213 and 99214 in particular often comes down to a single medical decision making element, which is why it deserves its own close look separate from the overall distribution, especially compared to other clinicians billing the same specialty to the same payer.
How a payer builds the comparison
Payers and Medicare Administrative Contractors run automated comparisons of each provider's billed-code frequency against a peer group defined by specialty, and sometimes by geography, before any human reviewer looks at a single chart. This is a statistical flag, not an accusation: the software is looking for a distribution that sits meaningfully outside the range other clinicians in the same specialty produce, not evaluating whether any specific visit was coded correctly.
Because the comparison is peer-based, what counts as an outlier depends heavily on which peer group a solo gets compared against. A behavioral health prescriber or an internist managing a complex, multi-condition patient panel may legitimately skew toward higher levels more often than a generalist seeing routine follow-ups — but that context only gets applied once a human reviewer is looking at the chart, not at the automated flagging stage. Seeing your profile against the specialty curve for the first time is often the moment a distribution that felt normal suddenly looks unusual.
Why the 2021 rules changed what 'normal' looks like
Before 2021, E/M levels were set partly by how much history and physical exam the note documented, which meant a longer note tended to justify a higher level almost by itself. The 2021 revisions removed history and exam as level-setting elements for office and outpatient visits entirely, shifting the decision to medical decision making or total time 1Ref 1Centers for Medicare & Medicaid Services (2023).Evaluation and Management Services Guide.That E/M office-visit levels are selected by medical decision making or total time under the 2021+ framework and what must be documented — the basis for what a normal distribution reflects and what a records request checks.2Ref 2American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA's 2021 E/M revisions eliminated history and exam as level-setting elements for office visits in favor of MDM or time — explains why distributions legitimately shifted after 2021..
That change legitimately shifted distributions across the board — a clinician who previously under-coded because a note felt too short for a higher level, despite genuinely complex decision making, may now correctly bill higher levels more often. A payer's peer-comparison baseline needs time to catch up to that shift, which means a distribution that looks unusual against an older baseline may simply reflect accurate coding under the current rules.
Prepayment review versus postpayment: two different flags
A distribution flag can trigger review before a claim is ever paid — a prepayment review holds the claim and requests documentation before releasing payment — or after payment, through a postpayment records request that can lead to a takeback letter if the documentation doesn't support what was billed. The two differ mainly in timing and leverage: prepayment review delays cash flow on every affected claim going forward until the pattern clears, while postpayment review reaches back across claims already paid.
Either way, the underlying question is the same: does the medical decision making or time documented for each visit actually match the level billed? Some payer contracts also define their own audit and lookback clauses that specify how far back a postpayment review can reach, which is worth checking alongside the federal overpayment-return rule. A distribution that looks unusual but is fully supported by documentation should survive either kind of review; the risk sits entirely in the gap between what was billed and what the note actually shows.
What happens when the flag fires: the records request
A distribution-triggered review typically arrives as a request for a sample of charts — often a handful of visits at the higher-billed levels — with a deadline to submit the note, distinct from the routine chart pulls some payers run for quality reporting rather than billing accuracy. Medicare requires every service to be authenticated by a handwritten or electronic signature, and an attestation statement can cure a note where the signature itself is ambiguous or missing 3Ref 3Centers for Medicare & Medicaid Services (2023).Complying with Medicare Signature Requirements.That Medicare requires services to be authenticated by signature and that an attestation statement can cure an ambiguous or missing signature — relevant to responding to a records request triggered by a distribution flag..
Some Medicare Administrative Contractors also publish jurisdiction-specific documentation and signature guidance beyond the general Medicare rule — CGS Medicare is one example — worth checking if the request comes through Medicare rather than a commercial payer 4Ref 4CGS Medicare (2026).CGS Medicare.That this Medicare Administrative Contractor publishes jurisdiction-specific documentation and signature guidance — cited as one named example of MAC-specific guidance worth checking alongside the general Medicare rule.. A late or incomplete response to a records request is its own separate problem, independent of whatever the distribution flag was actually about, and it can turn a routine profiling review into a more adversarial one, potentially closer to how serious a UPIC investigation becomes than a routine documentation fix.
Checking your own curve before anyone else does
Most EHRs and clearinghouses can produce a report of billed CPT frequency by month or quarter; running that report and looking at the raw split across 99212 through 99215 is the same exercise a payer's algorithm runs, just from the other side. A solo whose report shows 99214 or 99215 on nearly every visit, with 99212 and 99213 essentially unused, is looking at exactly the pattern that draws automated attention — whether or not the underlying documentation is solid.
That check is worth running on its own schedule, not waiting for a records request to prompt it. If the distribution looks unusual, the next step is spot-checking a handful of the higher-level notes against the MDM elements or time log that level requires, before a payer does the same thing on its own timeline.
If the review finds a real overpayment: the 60-day clock
If a chart pull from a distribution-triggered review turns up a genuine coding error — a level billed that the documentation doesn't support — federal rule requires an identified Medicare overpayment to be reported and returned within 60 days of identification, with that clock paused while an OIG self-disclosure or an applicable appeal is pending 5Ref 5Office of the Federal Register (2026).42 CFR 401.305 — Requirements for reporting and returning of overpayments.The 60-day overpayment rule: an identified Medicare overpayment must be reported and returned within 60 days of identification, with the deadline suspended during a pending self-disclosure or appeal — the deadline that starts once a distribution-triggered review confirms a real error..
That deadline runs from when the overpayment is identified, not from when the review started, so the moment a self-audit or a payer's chart pull confirms an error is the moment the clock starts. Treating that 60-day window as a hard deadline, rather than something to address once the broader review concludes, keeps a documentation problem from becoming a second, separate compliance problem.
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- 1.Centers for Medicare & Medicaid Services (2023). Evaluation and Management Services Guide. CMS Medicare Learning Network (MLN006764). link ✓That E/M office-visit levels are selected by medical decision making or total time under the 2021+ framework and what must be documented — the basis for what a normal distribution reflects and what a records request checks.
- 2.American Medical Association (2023). CPT evaluation and management (E/M) revisions. American Medical Association (AMA). link ✓That the AMA's 2021 E/M revisions eliminated history and exam as level-setting elements for office visits in favor of MDM or time — explains why distributions legitimately shifted after 2021.
- 3.Centers for Medicare & Medicaid Services (2023). Complying with Medicare Signature Requirements. CMS Medicare Learning Network (MLN905364). link ✓That Medicare requires services to be authenticated by signature and that an attestation statement can cure an ambiguous or missing signature — relevant to responding to a records request triggered by a distribution flag.
- 4.CGS Medicare (2026). CGS Medicare. Medicare Administrative Contractor portal. link ✓That this Medicare Administrative Contractor publishes jurisdiction-specific documentation and signature guidance — cited as one named example of MAC-specific guidance worth checking alongside the general Medicare rule.
- 5.Office of the Federal Register (2026). 42 CFR 401.305 — Requirements for reporting and returning of overpayments. eCFR. link ✓The 60-day overpayment rule: an identified Medicare overpayment must be reported and returned within 60 days of identification, with the deadline suspended during a pending self-disclosure or appeal — the deadline that starts once a distribution-triggered review confirms a real error.
https://www.gale.care/for-providers/em-em-audit-distribution · 5 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.