Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

HCC 196 — Myasthenia Gravis without (Acute) Exacerbation and Other Myoneural Disorders

Other models: CMS-HCC V22 HCC 75 · RxHCC V08 HCC 153

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Lambert-Eaton syndrome in disease classified elsewhere is a billable ICD-10-CM diagnosis code (G70.81).

Sequencing, inclusion, and exclusion notes published for G70.81 in the official ICD-10-CM tabular list.

Conditions that can never be reported with this code; the two are mutually exclusive.

Underlying conditions that must be sequenced before this code.

Official ICD-10-CM classifications closest to G70.81 in its code family, with their registry titles.

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.