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E08.41 ICD-10-CM Code: Diabetes mellitus due to underlying condition with diabetic mononeuropathy

E08.41 maps to CMS-HCC V28 37. 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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Code lookupE08.41

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Diabetes mellitus (E08-E13)

E08.41

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Diabetes mellitus due to underlying condition with diabetic mononeuropathy

Diabetes caused by another medical condition that damages a single nerve or nerve group, causing weakness or pain in specific areas of the body.

Buddy the Bee presenting code insight

Buddy Insight

Diabetes mellitus due to an underlying condition with diabetic mononeuropathy represents isolated single nerve dysfunction caused by microvascular ischemia from secondary diabetes.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 37

Coefficient HCC 37: 0.166 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 020

Code-level coefficient reference

ESRD/PACE

HCC 18

Code-level coefficient reference

RXHCC

HCC 30

Code-level coefficient reference

Code Book Path

Official
E08Diabetes mellitus due to underlying conditionE08.4Diabetes mellitus due to underlying condition with neurological complicationsE08.41Diabetes mellitus due to underlying condition with diabetic mononeuropathy

Inclusion Terms

Official

No inclusion terms are included in this display for E08.41. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for E08.41. Check the code and parent instructions in the Code Book.

Related Codes

Official
E08.40Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecifiedE08.42Diabetes mellitus due to underlying condition with diabetic polyneuropathyE08.43Diabetes mellitus due to underlying condition with diabetic autonomic (poly)neuropathyE08.44Diabetes mellitus due to underlying condition with diabetic amyotrophyE08.49Diabetes mellitus due to underlying condition with other diabetic neurological complication

Includes

Official

No Includes notes are included in this display for E08.41. Check the code and parent instructions in the Code Book.

Excludes 1

Official
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E08
  • drug or chemical induced diabetes mellitus (E09.-)Inherited from E00-E89, E08
  • gestational diabetes (O24.4-)Inherited from E00-E89, E08
  • neonatal diabetes mellitus (P70.2)Inherited from E00-E89, E08
  • postpancreatectomy diabetes mellitus (E13.-)Inherited from E00-E89, E08
  • postprocedural diabetes mellitus (E13.-)Inherited from E00-E89, E08
  • secondary diabetes mellitus NEC (E13.-)Inherited from E00-E89, E08
  • type 1 diabetes mellitus (E10.-)Inherited from E00-E89, E08
  • type 2 diabetes mellitus (E11.-)Inherited from E00-E89, E08

Code First

Official
  • the underlying condition, such as:Inherited from E08
  • congenital rubella (P35.0)Inherited from E08
  • Cushing's syndrome (E24.-)Inherited from E08
  • cystic fibrosis (E84.-)Inherited from E08
  • malignant neoplasm (C00-C96)Inherited from E08
  • malnutrition (E40-E46)Inherited from E08
  • pancreatitis and other diseases of the pancreas (K85-K86.-)Inherited from E08

Use Additional

Official
  • code to identify control using:Inherited from E08
  • injectable non-insulin antidiabetic drugs (Z79.85)Inherited from E08
  • insulin (Z79.4)Inherited from E08
  • oral antidiabetic drugs (Z79.84)Inherited from E08
  • oral hypoglycemic drugs (Z79.84)Inherited from E08

Code Also

Official

No Code Also instructions are included in this display for E08.41. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Document the underlying condition causing diabetes, the specific nerve affected, onset and duration of symptoms, neurological examination findings including the distribution of sensory or motor deficits, and nerve conduction study results if performed.
Record whether the mononeuropathy is acute or chronic and the functional impact.

MEAT Support

HCC Buddy guidance
Document the underlying condition causing diabetes, the specific nerve affected, onset and duration of symptoms, neurological examination findings including the distribution of sensory or motor deficits, and nerve conduction study results if performed.
Record whether the mononeuropathy is acute or chronic and the functional impact.

Audit Caution

HCC Buddy guidance
Diabetic mononeuropathy must be distinguished from non-diabetic causes of single nerve palsy (compression, trauma, vascular).
The causal link to diabetes should be documented by the provider.
CN III palsy in diabetes characteristically spares the pupil, distinguishing it from posterior communicating artery aneurysm compression.

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 E08.41 an HCC code?

Yes. E08.41 (Diabetes mellitus due to underlying condition with diabetic mononeuropathy) maps to HCC 37, Diabetes with Chronic Complications under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.166. 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: E08.41 is billable and maps to V28 HCC 37, Diabetes with Chronic Complications. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
E08.41
Description
Diabetes mellitus due to underlying condition with diabetic mononeuropathy
HCC (V28)
HCC 37 — Diabetes with Chronic Complications
RAF reference coefficient
0.166
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 37, Diabetes with Chronic Complications
0.166
ESRDHCC 18, Diabetes with Chronic Complications
Not separately weighted
RxHCCHCC 30, Diabetes with Complications
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 E08.41 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for E08.41

For E08.41, 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

E08.41 is the ICD-10-CM diagnosis code for diabetes mellitus due to underlying condition with diabetic mononeuropathy. Diabetes caused by another medical condition that damages a single nerve or nerve group, causing weakness or pain in specific areas of the body. E08.41 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering diabetes mellitus (e08-e13).

Under the CMS-HCC V28 risk adjustment model, E08.41 maps to Diabetes with Chronic Complications (HCC 37) with a source-labeled community, non-dual, aged reference coefficient of 0.166. No V24 mapping is shown for E08.41; use the applicable model and payment year when reviewing the V28 mapping. 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 which specific nerve is affected to support medical necessity. For E08.41, 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 E08.41 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Document which specific nerve is affected to support medical necessity
  • •Distinguish from polyneuropathy which affects multiple nerves

Clinical Significance

Diabetes mellitus due to an underlying condition with diabetic mononeuropathy represents isolated single nerve dysfunction caused by microvascular ischemia from secondary diabetes. Common presentations include cranial nerve palsies (particularly CN III with pupil sparing), carpal tunnel syndrome, and other entrapment neuropathies. Unlike diabetic polyneuropathy, mononeuropathy often has an acute onset and may resolve spontaneously over weeks to months as collateral vascular supply develops.

Documentation Requirements

  • ✓Document the underlying condition causing diabetes, the specific nerve affected, onset and duration of symptoms, neurological examination findings including the distribution of sensory or motor deficits, and nerve conduction study results if performed.
  • ✓Record whether the mononeuropathy is acute or chronic and the functional impact.

Child Codes

E08.40Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecified
HCC 37
E08.41Diabetes mellitus due to underlying condition with diabetic mononeuropathy
HCC 37
E08.42Diabetes mellitus due to underlying condition with diabetic polyneuropathy
HCC 37
E08.43Diabetes mellitus due to underlying condition with diabetic autonomic (poly)neuropathy
HCC 37
E08.44Diabetes mellitus due to underlying condition with diabetic amyotrophy
HCC 37
E08.49Diabetes mellitus due to underlying condition with other diabetic neurological complication
HCC 37

Code Hierarchy

└E08Diabetes mellitus due to underlying condition└E08.4Diabetes mellitus due to underlying condition with neurological complications└E08.41Diabetes mellitus due to underlying condition with diabetic mononeuropathy
└E08.41Diabetes mellitus due to underlying condition with diabetic mononeuropathy

Also searched as

  • E08 41
  • E0841

For E08.41, 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.

E08.41 maps to CMS-HCC V28 category 37, Diabetes with Chronic Complications. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for E08.41. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work E08.41 in HCC Buddy

Open E08.41 in the Code Book for the full Index-to-Tabular path, MEAT checklist, and V28 HCC mapping, or in the Encoder to code from a keyword search. Pro includes 7 days to try everything, no card required.

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