ICD-10 Z99.2
Billable / Specific HCC v28: 134Dependence on renal dialysis
About ICD-10-CM Z99.2
ICD-10-CM code Z99.2 represents Dependence on renal dialysis. This is a billable/specific code in the Factors Influencing Health Status chapter (block Z99). The 2026 edition of ICD-10-CM Z99.2 became effective on October 1, 2025.
Coding Tips for Z99.2
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Z99.2 is a CMS-HCC v28 risk-adjustment code (category 134). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Z99.2. Per CMS ICD-10-CM Tabular 2026.
- Hemodialysis status
- Peritoneal dialysis status
- Presence of arteriovenous shunt for dialysis
- Renal dialysis status NOS
Type 1 Excludes
Pure excludes, these codes can never be coded together with Z99.2. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- encounter for fitting and adjustment of dialysis catheter (Z49.0-)
Type 2 Excludes
Not included here, the excluded code is not part of Z99.2, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- noncompliance with renal dialysis (Z91.15-)
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for Z99.2
Local Coverage Determinations (LCDs) from CMS MACs that list Z99.2 as a covered diagnosis.
Showing top 10 of 75 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z99.2.
4 Aetna
4 Medicare
CPT Codes Commonly Billed with Z99.2
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 36821 AV fistula creation — ESRD, CKD stage 5, dialysis dependent, arterial stricture Nephrology
Convert Z99.2 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| Z99.2 | V4511 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Z99.2
Other codes in section Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).
ICD-10 Z99.2, Billing FAQ
Is ICD-10 code Z99.2 billable? +
Yes, Z99.2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to Z99.2? +
ICD-10 Z99.2 includes: Hemodialysis status; Peritoneal dialysis status; Presence of arteriovenous shunt for dialysis, and 1 more clinical synonyms.
What codes are Type 1 Excludes for Z99.2? +
Type 1 Excludes (never code together with Z99.2): encounter for fitting and adjustment of dialysis catheter (Z49.0-)
What codes are Type 2 Excludes for Z99.2? +
Type 2 Excludes (may be coded together when both conditions exist): noncompliance with renal dialysis (Z91.15-)
Does Z99.2 affect Medicare Advantage HCC risk adjustment? +
Yes. Z99.2 maps to CMS-HCC v28 category 134. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with Z99.2? +
Procedures frequently paired with Z99.2 include: 36821.
What ICD-9 codes does Z99.2 map to? +
Per CMS GEMs, Z99.2 maps to ICD-9 codes: V4511. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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