What is ICD-10 code G96.810?

G96.810 is the ICD-10-CM diagnosis code for Intracranial hypotension, unspecified. Low pressure in the fluid surrounding the brain and spinal cord when the specific cause is not identified. It belongs to the ICD-10-CM chapter for diseases of the nervous system (g00-g99). G96.810 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. G96.810 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. G96.810 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. G96.810 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does G96.810 map to under V28?

G96.810 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for G96.810?

G96.810 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for G96.810?

G96.810 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

What documentation supports G96.810?

This is the default code when intracranial hypotension is documented without specifying spontaneous or other cause Review clinical notes to determine if G96.811 or G96.819 would be more specific G96.810 is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

2026 ICD-10-CM G96.810: Intracranial hypotension

G96.810 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

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Code lookupG96.810

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Other disorders of the nervous system (G89-G99)

G96.810

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Intracranial hypotension, unspecified

Low pressure in the fluid surrounding the brain and spinal cord when the specific cause is not identified.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

G96.8Other specified disorders of central nervous system G96.81Intracranial hypotension G96.810Intracranial hypotension, unspecified

Inclusion Terms

Official

No inclusion terms are included in this display for G96.810. Check the code and parent instructions in the Code Book.

Excludes 2

Official

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

Related Codes

Official

G96.811Intracranial hypotension, spontaneous G96.819Other intracranial hypotension

Includes

Official

No Includes notes are included in this display for G96.810. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for G96.810. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for G96.810. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for G96.810. Check the code and parent instructions in the Code Book.

Code Also

Official

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

Buddy Documentation Tip

HCC Buddy guidance

This is the default code when intracranial hypotension is documented without specifying spontaneous or other cause

Review clinical notes to determine if G96.811 or G96.819 would be more specific

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is G96.810 an HCC code?

No. G96.810 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: G96.810
Description: Intracranial hypotension, unspecified
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

G96.810 is the ICD-10-CM diagnosis code for intracranial hypotension, unspecified. Low pressure in the fluid surrounding the brain and spinal cord when the specific cause is not identified. G96.810 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering other disorders of the nervous system (g89-g99).

G96.810 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

This is the default code when intracranial hypotension is documented without specifying spontaneous or other cause.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for G96.810 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This is the default code when intracranial hypotension is documented without specifying spontaneous or other cause
•Review clinical notes to determine if G96.811 or G96.819 would be more specific

Child Codes

G96.810Intracranial hypotension, unspecified

G96.811Intracranial hypotension, spontaneous

G96.819Other intracranial hypotension

Code Hierarchy

└G96Other disorders of central nervous system └G96.8Other specified disorders of central nervous system └G96.81Intracranial hypotension └G96.810Intracranial hypotension, unspecified

└G96.810Intracranial hypotension, unspecified

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G96.810

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G96.810 code history

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

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G96.810

Is G96.810 an HCC code?

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What This Code Means

Coding Tips

Child Codes

Code Hierarchy

G96.810 code history

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