Risk adjustment coding is the capture of the diagnoses that drive risk-adjusted payment. Under the CMS-HCC model used for Medicare Advantage and the HHS model used for ACA plans, certain chronic and serious conditions map to Hierarchical Condition Categories (HCCs), and those HCCs set a member's risk adjustment factor (RAF), which determines the plan's payment.
It is different from fee-for-service coding in one way that changes everything. A missed HCC does not trigger a denial. The claim pays, and the payment is simply lower than the member's actual acuity warranted, for the whole year, with no signal that anything went wrong.
Two rules make it hard. Chronic conditions have to be documented and coded every calendar year to keep counting. And RADV audits can claw back payment for any HCC the documentation does not support.
Four ways RAF accuracy is lost
- Uncaptured chronic conditions: A documented chronic condition that never gets coded is an HCC that never counts. The member's RAF understates their acuity.
- Missed annual recapture: HCCs reset every calendar year. A condition captured last year that is not recaptured this year drops off the RAF.
- Unsupported codes and RADV risk: Coding an HCC the documentation does not support is worse than missing one. RADV audits can claw the payment back.
- Specificity gaps: Many diagnoses only map to an HCC at a specific level of documentation. A vague code captures no HCC where a specific one would.
How MediCodio codes for risk adjustment
Step 01: Reads the full record for documented conditions
NLP reviews the encounter and the problem list for chronic and serious conditions that are documented and addressed.
Step 02: Maps diagnoses to HCCs at the right specificity
Documented conditions are coded to the specificity that captures the correct HCC, and conditions that are not supported are flagged rather than coded.
Step 03: Checks capture against the member's history
The system surfaces chronic conditions captured in prior years that have not been recaptured this year.
Step 04: Routes the judgement calls to a coder
Where documentation is ambiguous or an HCC carries RADV exposure, the chart holds in CoPilot for a credentialled coder.
Capture everything supported. Code nothing that is not.
Risk adjustment accuracy has to run in both directions, and MediCodio's two lanes are built for it. AutoPilot captures the clearly documented HCCs at volume. CoPilot holds the charts where a condition is named but the documentation may not support the code.
Every coded HCC carries the documentation passage and the rule that supports it, so capture can be defended in an audit rather than assumed.
Accuracy
MediCodio reports 98%+ first-pass coding accuracy across deployments since 2023, measured at the code level on production charts before any correction, against a reference review by AAPC- and AHIMA-credentialled coders (including CRC holders). Coverage spans 35+ specialties.