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ICD-10-CM 2027 diagnosis code

G93.1Anoxic brain damage, not elsewhere classified

✓ Billable / specificCC — complication/comorbidity

G93.1 is a valid, billable ICD-10-CM code for anoxic brain damage, not elsewhere classified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Cerebral anoxia.

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 G93.1

G93.1 is the ICD-10-CM diagnosis code for Anoxic brain damage, not elsewhere classified. It belongs to category G93 (other disorders of brain), block G89-G99 (other disorders of the nervous system) 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 G93 (other disorders of brain), G93.1 is specifically for Anoxic brain damage, not elsewhere classified. Related codes cover cerebral cysts (G93.0), benign intracranial hypertension (G93.2), Postviral and related fatigue syndromes (G93.3), other and unspecified encephalopathy (G93.4), compression of brain (G93.5), cerebral edema (G93.6), Reye's syndrome (G93.7), other specified disorders of brain (G93.8) and 1 more.

Don't report G93.1 together with the conditions in its Excludes1 note: cerebral anoxia due to anesthesia during labor and delivery (O74.3), cerebral anoxia due to anesthesia during the puerperium (O89.2) and neonatal anoxia (P84).

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), DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 01 (Diseases and Disorders of the Nervous System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 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 348.1 (Anoxic brain damage).

Coding notes

Excludes1Not coded here — never report together with this code
  • cerebral anoxia due to anesthesia during labor and delivery (O74.3)
  • cerebral anoxia due to anesthesia during the puerperium (O89.2)
  • neonatal anoxia (P84)

Notes that apply from higher levels

Instructions written at a parent level also apply to G93.1.

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

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to G93.1.

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.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 348.1Anoxic brain damageexact

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 G93.1

Is G93.1 billable?

Yes. G93.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G93.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G93.1 as a principal diagnosis.

Is G93.1 a CC or MCC?

G93.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does G93.1 group to?

G93.1 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), MS-DRG 093 (Other Disorders of Nervous System without CC/MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). 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 G93.1?

The CMS General Equivalence Mappings map G93.1 to ICD-9-CM 348.1.