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ICD-10-CM 2027 diagnosis code

G73.7Myopathy in diseases classified elsewhere

✓ Billable / specificManifestation — not principal

G73.7 is a valid, billable ICD-10-CM code for myopathy in diseases classified elsewhere. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G73.7

G73.7 is the ICD-10-CM diagnosis code for myopathy in diseases classified elsewhere. It belongs to category G73 (disorders of myoneural junction and muscle in diseases classified elsewhere), block G70-G73 (diseases of myoneural junction and muscle) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G73 (disorders of myoneural junction and muscle in diseases classified elsewhere), G73.7 is specifically for myopathy in diseases classified elsewhere. Related codes cover Lambert-Eaton syndrome in neoplastic disease (G73.1) and Myasthenic syndromes in other diseases classified elsewhere (G73.3).

Don't report G73.7 together with the conditions in its Excludes1 note: rheumatoid arthritis (M05.32), sarcoidosis (D86.87), scleroderma (M34.82), Sjögren syndrome (M35.03) and 1 more.

Code first underlying disease, such as: glycogen storage disease (E74.0-), hyperparathyroidism (E21.0, E21.3), hypoparathyroidism (E20.-) and lipid storage disorders (E75.-).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 359.5 (myopathy in endocrine diseases classified elsewhere).

Coding notes

Excludes1Not coded here — never report together with this code
Code firstSequence the underlying condition first
  • underlying disease, such as:
  • glycogen storage disease (E74.0-)
  • hyperparathyroidism (E21.0, E21.3)
  • hypoparathyroidism (E20.-)
  • lipid storage disorders (E75.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to G73.7.

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Codes whose notes reference G73.7

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 359.5Myopathy in endocrine diseases classified elsewhereapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about G73.7

Is G73.7 billable?

Yes. G73.7 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G73.7 be used as a principal diagnosis?

No. It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

Is G73.7 a CC or MCC?

No. G73.7 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G73.7 group to?

G73.7 is used in the MS-DRG v44.0 logic for MS-DRG 091 (Other Disorders of Nervous System with MCC), MS-DRG 092 (Other Disorders of Nervous System with CC) and MS-DRG 093 (Other Disorders of Nervous System without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for G73.7?

The CMS General Equivalence Mappings map G73.7 to ICD-9-CM 359.5.