2027 ICD-10-CM Diagnosis Code G96.810Intracranial hypotension, unspecified

ICD-10-CM Codes›G00–G99›G89-G99›G96

ICD-10-CM G96.810
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G96.810 is a billable ICD-10-CM diagnosis code for intracranial hypotension, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 70 through 72. Coders also document this condition as cerebrospinal fluid pressure finding. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G96.810
Billable Status
Yes — Valid for Submission
Code Describes
Intracranial hypotension, unspecified
Short Description
Intracranial hypotension, unspecified
Same as the full description in the CMS dataset.
Parent Code
G96.81
Intracranial hypotension

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG96Other disorders of central nervous system
This CodeG96.810Intracranial hypotension, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cerebrospinal fluid pressure finding
  • CSF pressure: low
  • Finding of intracranial pressure
  • Intracranial hypotension
  • Low intracranial pressure

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G96.810: its own notes plus those printed at G96.81 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From G96.81 Intracranial hypotension applies to 3 codes
  • any associated diagnoses, such as:
  • Brachial amyotrophy (G54.5)
  • Cerebrospinal fluid leak from spine (G96.02)
  • Cranial nerve disorders in diseases classified elsewhere (G53)
  • Nerve root and compressions in diseases classified elsewhere (G55)
  • Nonpyogenic thrombosis of intracranial venous system (I67.6)
  • Nontraumatic intracerebral hemorrhage (I61.-)
  • Nontraumatic subdural hemorrhage (I62.0-)
  • Other and unspecified cord compression (G95.2-)
  • Other secondary parkinsonism (G21.8)
  • Reversible cerebrovascular vasoconstriction syndrome (I67.841)
  • Spinal cord herniation (G95.89)
  • Stroke (I63.-)
  • Syringomyelia (G95.0)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G96.810, its category, or a range that includes it.

Code Also 2

These codes say G96.810 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • G96.0 Cerebrospinal fluid leak
    intracranial hypotension (G96.81-) names G96.81-, which includes this code
  • G96.11 Dural tear
    intracranial hypotension, if applicable (G96.81-) names G96.81-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS020
Other nervous system disorders (neither hereditary nor degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Intracranial Hypotension

    reduction of cerebrospinal fluid pressure characterized clinically by orthostatic headache and occasionally by an abducens nerve palsy; hearing loss; nausea; neck stiffness, and other symptoms. this condition may be spontaneous or secondary to cerebrospinal fluid leak; spinal puncture; neurosurgical procedures; dehydration; uremia; trauma (see also craniocerebral trauma); and other processes. chronic hypotension may be associated with subdural hematomas (see hematoma, subdural) or hygromas. (from semin neurol 1996 mar;16(1):5-10; adams et al., principles of neurology, 6th ed, pp637-8)

Code History & ChangesHistory

Replacement G96.810 replaces the following previously assigned code(s):

  • G96.8 - Other specified disorders of central nervous system
FY 2021AddedAdded to the ICD-10-CM code setEffective October 1, 2020.
FY 2022–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G96.810Overview

What is the ICD-10 code for intracranial hypotension, unspecified?

The ICD-10-CM code for intracranial hypotension, unspecified is G96.810 (sometimes written as G96810). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is G96.810 (Intracranial hypotension) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report intracranial hypotension, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G96.810 group to?

When intracranial hypotension, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 72, 70, 71, with relative weights from 0.7344 to 1.6089 depending on complications. Higher weights mean higher Medicare reimbursement.