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ICD-10-CM 2027 diagnosis code

G96.01Cranial cerebrospinal fluid leak, spontaneous

✓ Billable / specificCC — complication/comorbidity

G96.01 is a valid, billable ICD-10-CM code for cranial cerebrospinal fluid leak, spontaneous. 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 Cerebrospinal fluid otorrhea, ICD-10 code for Cerebrospinal fluid rhinorrhea.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G96.01

G96.01 is the ICD-10-CM diagnosis code for cranial cerebrospinal fluid leak, spontaneous. It belongs to category G96 (other disorders of central nervous system), 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 G96.0 (cerebrospinal fluid leak), G96.01 is specifically for cranial cerebrospinal fluid leak, spontaneous. Related codes cover unspecified (G96.00), spinal cerebrospinal fluid leak, spontaneous (G96.02), other cranial cerebrospinal fluid leak (G96.08) and other spinal cerebrospinal fluid leak (G96.09).

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 was added in FY2021, effective October 1, 2020.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Otorrhea due to spontaneous cerebrospinal fluid CSF leak
  • Rhinorrhea due to spontaneous cerebrospinal fluid CSF leak
  • Spontaneous cerebrospinal fluid leak from skull base

Notes that apply from higher levels

Instructions written at a parent level also apply to G96.01.

› From G96.0 Cerebrospinal fluid leak
Excludes1
  • cerebrospinal fluid leak from spinal puncture (G97.0)
Code also
  • if applicable:
  • intracranial hypotension (G96.81-)

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

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to G96.01.

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

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
  • No changes since FY2021.

Common questions about G96.01

Is G96.01 billable?

Yes. G96.01 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G96.01 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G96.01 as a principal diagnosis.

Is G96.01 a CC or MCC?

G96.01 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does G96.01 group to?

G96.01 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.