C92.91 ICD-10-CM Code: Myeloid leukemia, unspecified in remission
C92.91 maps to CMS-HCC V28 20. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
C92.91
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMyeloid leukemia, unspecified in remission
A type of myeloid blood cancer that cannot be more specifically classified but has responded to treatment and is in remission.
Buddy Insight
Myeloid leukemia, unspecified, in remission indicates that an unspecified myeloid leukemia has responded to treatment.
CMS-HCC V28
MappedHCC 20
Coefficient HCC 20: 1.136 (Community Non-Dual Aged (CNA))
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
MappedHCC 009
Code-level coefficient reference
ESRD/PACE
MappedHCC 9
Code-level coefficient reference
RXHCC
MappedHCC 19
Code-level coefficient reference
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for C92.91. Check the code and parent instructions in the Code Book.
Excludes 2
Official- Kaposi's sarcoma of lymph nodes (C46.3)Inherited from C81-C96
- secondary and unspecified neoplasm of lymph nodes (C77.-)Inherited from C81-C96
- secondary neoplasm of bone marrow (C79.52)Inherited from C81-C96
- secondary neoplasm of spleen (C78.89)Inherited from C81-C96
Related Codes
Includes
Official- granulocytic leukemiaInherited from C92
- myelogenous leukemiaInherited from C92
Excludes 1
Official- personal history of leukemia (Z85.6)Inherited from C92
Code First
OfficialNo Code First sequencing instructions are included in this display for C92.91. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for C92.91. Check the code and parent instructions in the Code Book.
Code Also
Official- , if applicable, pancytopenia (acquired) (D61.818)Inherited from C92
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is C92.91 an HCC code?
Yes. C92.91 (Myeloid leukemia, unspecified in remission) maps to HCC 20, Lung and Other Severe Cancers under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 1.136. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.
Coder answer: C92.91 is billable and maps to V28 HCC 20, Lung and Other Severe Cancers. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- C92.91
- Description
- Myeloid leukemia, unspecified in remission
- HCC (V28)
- HCC 20 — Lung and Other Severe Cancers
- RAF reference coefficient
- 1.136
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work C92.91 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for C92.91
For C92.91, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Coder workflow notes
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What This Code Means
C92.91 is the ICD-10-CM diagnosis code for myeloid leukemia, unspecified in remission. A type of myeloid blood cancer that cannot be more specifically classified but has responded to treatment and is in remission. C92.91 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of lymphoid, hematopoietic and related tissue (c81-c96).
Under the CMS-HCC V28 risk adjustment model, C92.91 maps to Lung and Other Severe Cancers (HCC 20) with a source-labeled community, non-dual, aged reference coefficient of 1.136. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.
Document the remission status clearly in the clinical notes. For C92.91, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for C92.91 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the remission status clearly in the clinical notes
- •Consider whether additional pathology testing could provide more specific subtype classification
Clinical Significance
Myeloid leukemia, unspecified, in remission indicates that an unspecified myeloid leukemia has responded to treatment. At the point of remission, the specific subtype should typically be well-established through prior diagnostic workup, making this unspecified code unusual. The code may be appropriate for historical diagnoses where the original subtype documentation is unavailable.
Documentation Requirements
- ✓Documentation must state remission explicitly.
- ✓Efforts should be made to determine and document the specific myeloid leukemia subtype through review of prior pathology reports and treatment history.
- ✓Current monitoring plan and method of remission assessment should be recorded.
- ✓Any available information to reclassify to a more specific code should be sought and documented.
Commonly Confused Codes
- •More specific remission codes are preferred: C92.01 (AML in remission), C92.11 (CML in remission), C92.41 (APL in remission), C92.51 (AMML in remission).
- •C92.21 (aCML in remission) and C92.61 (AML with 11q23 in remission) are other specific options.
- •Z85.6 (personal history of leukemia) should not be used while active monitoring continues.