What is ICD-10 code D70.9?

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. It belongs to the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89). D70.9 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. D70.9 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. D70.9 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. D70.9 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does D70.9 map to under V28?

D70.9 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for D70.9?

D70.9 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for D70.9?

D70.9 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

What documentation supports D70.9?

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 D70.9 is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

2026 ICD-10-CM D70.9: Neutropenia, unspecified

D70.9 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupD70.9

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

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 guidance

Neutropenia, 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.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

Mapped

HCC 47

Disorders of Immunity

Code-level coefficient reference

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

D70Neutropenia D70.9Neutropenia, unspecified

Inclusion Terms

Official

No inclusion terms are included in this display for D70.9. Check the code and parent instructions in the Code Book.

Excludes 2

Official

autoimmune disease (systemic) NOS (M35.9)Inherited from D50-D89
certain conditions originating in the perinatal period (P00-P96)Inherited from D50-D89
complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from D50-D89
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Inherited from D50-D89
endocrine, nutritional and metabolic diseases (E00-E88)Inherited from D50-D89
human immunodeficiency virus [HIV] disease (B20)Inherited from D50-D89
injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from D50-D89
neoplasms (C00-D49)Inherited from D50-D89
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from D50-D89

Related Codes

Official

D70.0Congenital agranulocytosis D70.1Agranulocytosis secondary to cancer chemotherapy D70.2Other drug-induced agranulocytosis D70.3Neutropenia due to infection D70.4Cyclic neutropenia

Includes

Official

agranulocytosisInherited from D70
decreased absolute neurophile count (ANC)Inherited from D70

Excludes 1

Official

neutropenic splenomegaly (D73.81)Inherited from D70
transient neonatal neutropenia (P61.5)Inherited from D70

Code First

Official

No Code First sequencing instructions are included in this display for D70.9. Check the code and parent instructions in the Code Book.

Use Additional

Official

code for any associated:Inherited from D70
fever (R50.81)Inherited from D70

Code Also

Official

, if applicable, mucositis (J34.81, K12.3-, K92.81, N76.81)Inherited from D70

Buddy Documentation Tip

HCC Buddy guidance

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.

MEAT Support

HCC Buddy guidance

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.

Audit Caution

HCC Buddy guidance

Mild neutropenia (ANC 1000-1500) may be a normal variant in certain ethnic groups (benign ethnic neutropenia) — verify clinical significance before coding.

Do not assign this code for transient neutropenia that resolves without clinical impact.

Query the provider for the specific cause when workup has been completed.

Common Mistakes

HCC Buddy guidance

D70.0 (Congenital agranulocytosis) — when inherited cause is confirmed

D70.1-D70.2 (Drug-induced) — when medication-related

D70.3 (Infection-related) — when caused by infection

D70.8 (Other neutropenia) — when a specific acquired cause is identified.

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 D70.9 an HCC code?

D70.9 is not in the CMS-HCC V28 or V24 community payment model. D70.9 has a separate mapping under the CMS-HCC ESRD model (HCC 47 (Disorders of Immunity)); the applicable result needs member context.

Code: D70.9
Description: Neutropenia, unspecified
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

HCC Category Mapping

ESRDHCC 47, Disorders of Immunity

Not separately weighted

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 D70.9 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for D70.9

For D70.9, 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

Get the V28 mapping + MEAT cheat sheet

One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.

Free PDF. No card. Unsubscribe anytime.

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).

D70.9 has no mapping under the CMS-HCC V28 or V24 community payment models. D70.9 has a separate mapping under the CMS-HCC ESRD model (HCC 47 (Disorders of Immunity)); the applicable result needs member context. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.

This is the least specific neutropenia code; query the provider for more information about the cause.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, 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.