What is ICD-10 code E10.41?

E10.41 is the ICD-10-CM diagnosis code for Type 1 diabetes mellitus with diabetic mononeuropathy. Type 1 diabetes with damage to a single nerve or nerve group, causing weakness or pain in a specific area of the body. E10.41 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. E10.41 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. E10.41 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. E10.41 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 E10.41 map to under V28?

E10.41 maps to CMS-HCC V28 HCC 37 (Diabetes with Chronic Complications). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM E10.41: Type 1 diabetes mellitus

E10.41 maps to CMS-HCC V28 37. A source-labeled RAF reference is available. Documentation must support MEAT. 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 lookupE10.41Effective periodFY2026 Apr Update (Apr 1-Sep 30)

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

E10.41

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

Type 1 diabetes mellitus with diabetic mononeuropathy

Type 1 diabetes with damage to a single nerve or nerve group, causing weakness or pain in a specific area of the body.

Buddy Insight

Type 1 diabetes mellitus with diabetic mononeuropathy involves damage to a single peripheral nerve, distinguishing it from the more common diffuse polyneuropathy.

CMS-HCC V28

Mapped

HCC 37

Diabetes with Chronic Complic...

Code-level coefficient reference

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

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

Mapped

HCC 30

Diabetes with Complications

Code-level coefficient reference

Code Book Path

Official

E10Type 1 diabetes mellitus

E10.4Type 1 diabetes mellitus with neurological complications

E10.41Type 1 diabetes mellitus with diabetic mononeuropathy

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for E10.41 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for E10.41 in this effective period.

Related Child Codes

Official

E10.40Type 1 diabetes mellitus with diabetic neuropathy, unspecified

E10.42Type 1 diabetes mellitus with diabetic polyneuropathy

E10.43Type 1 diabetes mellitus with diabetic autonomic (poly)neuropathy

E10.44Type 1 diabetes mellitus with diabetic amyotrophy

E10.49Type 1 diabetes mellitus with other diabetic neurological complication

Includes

Official

ICD-10-CM does not list Includes notes for E10.41 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for E10.41 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for E10.41 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for E10.41 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for E10.41 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Type 1 diabetes must be confirmed.

The specific nerve affected should be documented with corresponding clinical findings (motor deficits, sensory loss, pain distribution).

Electrodiagnostic studies (nerve conduction velocity, EMG) confirming focal nerve involvement should be referenced.

The provider must link the mononeuropathy to diabetes rather than entrapment, trauma, or other causes.

MEAT Support

HCC Buddy guidance

Type 1 diabetes must be confirmed.

The specific nerve affected should be documented with corresponding clinical findings (motor deficits, sensory loss, pain distribution).

Electrodiagnostic studies (nerve conduction velocity, EMG) confirming focal nerve involvement should be referenced.

The provider must link the mononeuropathy to diabetes rather than entrapment, trauma, or other causes.

Audit Caution

HCC Buddy guidance

Diabetic mononeuropathy must be distinguished from entrapment neuropathy occurring coincidentally in a diabetic patient. Third cranial nerve palsy in a diabetic patient may be mistaken for a cerebrovascular event

the pupil-sparing nature of diabetic third nerve palsy is a key distinguishing feature. The temporal course (often self-limited) helps differentiate from other causes.

Common Mistakes

HCC Buddy guidance

E10.42 (polyneuropathy) involves diffuse multi-nerve damage.

E10.40 (unspecified neuropathy) lacks specificity.

E10.43 (autonomic neuropathy) involves the involuntary nervous system.

G56-G58 (mononeuropathy codes by site) may be coded additionally for nerve specification but should not replace this combination code.

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 E10.41 an HCC code?

Yes. E10.41 (Type 1 diabetes mellitus 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: E10.41 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: E10.41
Description: Type 1 diabetes mellitus 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

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 E10.41 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT Criteria for E10.41

For E10.41 to 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 E10.41 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

E10.41 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus with diabetic mononeuropathy. Type 1 diabetes with damage to a single nerve or nerve group, causing weakness or pain in a specific area of the body. E10.41 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, E10.41 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 E10.41; use the applicable model and payment year when reviewing the V28 mapping. 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. 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 nerve is affected (e.g., cranial nerve, femoral nerve) when possible. Because E10.41 maps to an HCC category, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. 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 E10.41 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Document which nerve is affected (e.g., cranial nerve, femoral nerve) when possible
•Mononeuropathy is less common than polyneuropathy in diabetes but still significant

Clinical Significance

Type 1 diabetes mellitus with diabetic mononeuropathy involves damage to a single peripheral nerve, distinguishing it from the more common diffuse polyneuropathy. Common presentations include cranial nerve III palsy (causing ptosis and diplopia), carpal tunnel syndrome, ulnar neuropathy, or femoral neuropathy. Mononeuropathies in Type 1 diabetes are thought to result from vasa nervorum ischemia and often have acute or subacute onset, which may prompt urgent evaluation to exclude other causes such as stroke.

Documentation Requirements

✓Type 1 diabetes must be confirmed.
✓The specific nerve affected should be documented with corresponding clinical findings (motor deficits, sensory loss, pain distribution).
✓Electrodiagnostic studies (nerve conduction velocity, EMG) confirming focal nerve involvement should be referenced.
✓The provider must link the mononeuropathy to diabetes rather than entrapment, trauma, or other causes.

Commonly Confused Codes

•E10.42 (polyneuropathy) involves diffuse multi-nerve damage.
•E10.40 (unspecified neuropathy) lacks specificity.
•E10.43 (autonomic neuropathy) involves the involuntary nervous system.
•G56-G58 (mononeuropathy codes by site) may be coded additionally for nerve specification but should not replace this combination code.