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ICD-10-CM 2027 diagnosis code

G71.20Congenital myopathy, unspecified

✓ Billable / specificCC — complication/comorbidity

G71.20 is a valid, billable ICD-10-CM code for congenital myopathy, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2022 (effective October 1, 2021). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G71.20

G71.20 is the ICD-10-CM diagnosis code for congenital myopathy, unspecified. It belongs to category G71 (primary disorders of muscles), 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 G71.2, choose G71.20 (Congenital myopathy, unspecified) only when documentation doesn't support a more specific option: Nemaline myopathy (G71.21), centronuclear myopathy (G71.22) and other congenital myopathy (G71.29).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

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 was added in FY2021, effective October 1, 2020, and changed in FY2022.

Notes that apply from higher levels

Instructions written at a parent level also apply to G71.20.

› From G71.2 Congenital myopathies
Excludes2
  • arthrogryposis multiplex congenita (Q74.3)
› From G71 Primary disorders of muscles
Excludes2
  • arthrogryposis multiplex congenita (Q74.3)
  • metabolic disorders (E70-E88)
  • myositis (M60.-)

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

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to G71.20.

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.

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
  • FY2021 (effective 10/1/2020): Added
  • FY2022 (effective 10/1/2021): Title revised — was “Congenital myopathy, unspecifed”

Common questions about G71.20

Is G71.20 billable?

Yes. G71.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G71.20 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G71.20 as a principal diagnosis.

Is G71.20 a CC or MCC?

G71.20 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does G71.20 group to?

G71.20 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.