ICD-10 · PDGM grouping
G73 Disorders of myoneural junction and muscle in diseases classified elsewhere
All 3 codes in the G73 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
3
Can lead a claim
0
Cannot lead a claim
3
What CMS assigns to G73
None of the 3 codes is assigned a clinical group. None of the 3 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 3.
Code first
CMS grouper convention 9, on G73.1. Code first:
- neoplasm (C00-D49)
CMS grouper convention 39, on G73.3. Code first:
- neoplasm (C00-D49)
- thyrotoxicosis (E05.-)
- underlying disease, such as:
CMS grouper convention 40, on G73.7. Code first:
- glycogen storage disease (E74.0-)
- hyperparathyroidism (E21.0, E21.3)
- hypoparathyroidism (E20.-)
- lipid storage disorders (E75.-)
- underlying disease, such as:
Every code in G73
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| G73.1 | Lambert-Eaton syndrome in neoplastic disease | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosisManifestation code is not reportable as principal diagnosis | None | None |
| G73.3 | Myasthenic syndromes in other diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| G73.7 | Myopathy in diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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