D70.9 ICD-10-CM Code: Neutropenia, unspecified
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) / Other disorders of blood and blood-forming organs (D70-D77)
D70.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceNeutropenia, unspecified
A low white blood cell count where the underlying cause has not been determined or documented.
Buddy Insight
Neutropenia, unspecified, indicates a documented low absolute neutrophil count without further characterization of the cause.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
MappedHCC 47
RAF 0.472
ACA/HHS
00
RAF 0
ESRD/PACE
MappedHCC 47
RAF 0.0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D70.9 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D70.9 in this effective period.
Related Child Codes
Includes
Official- agranulocytosis
- decreased absolute neurophile count (ANC)
Excludes 1
Official- neutropenic splenomegaly (D73.81)
- transient neonatal neutropenia (P61.5)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D70.9 in this effective period.
Use Additional
Official- code for any associated:
- fever (R50.81)
Code Also
Official- , if applicable, mucositis (J34.81, K12.3-, K92.81, N76.81)
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is D70.9 an HCC code?
Yes. D70.9 maps to Disorders of Immunity under the V24 model but is not retained in V28.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for D70.9
For D70.9to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- 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
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed D70.9 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
D70.9 is the ICD-10-CM diagnosis code for neutropenia, unspecified. A low white blood cell count where the underlying cause has not been determined or documented. D70.9 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering other disorders of blood and blood-forming organs (d70-d77).
Under the older CMS-HCC V24 model, D70.9 maps to Disorders of Immunity (HCC 47) with a community, non-dual, aged base RAF weight of 0.472. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
This is the least specific neutropenia code; query the provider for more information about the cause. Because D70.9 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, and MEAT documentation criteria for D70.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is the least specific neutropenia code; query the provider for more information about the cause
- •Review the medical record thoroughly to determine if a more specific D70 code should be used instead
Clinical Significance
Neutropenia, unspecified, indicates a documented low absolute neutrophil count without further characterization of the cause. This nonspecific code should prompt diagnostic evaluation to determine the etiology, as management varies significantly based on the underlying cause. It should be replaced with a more specific neutropenia code once the workup is complete.
Documentation Requirements
- ✓Document the absolute neutrophil count, clinical context (incidental finding, recurrent infections, medication use), and the diagnostic evaluation plan.
- ✓Record peripheral blood smear findings and whether hematology referral has been made.
- ✓Update the diagnosis code when the specific cause is determined.