HealthAssure
HealthAssureGood Life
ICD10BillableValid for clinical use

ICD-10 Code G23.8: Other specified degenerative diseases of basal ganglia

G23.8 is a billable ICD-10 diagnosis code used to classify Other specified degenerative diseases of basal ganglia in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

  • May be used when a clinician documents other specified degenerative diseases of basal ganglia in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
6Diseases of the nervous system (G00-G99)
block
G20-G26Extrapyramidal and movement disorders
category
G23Other degenerative diseases of basal ganglia
currentG23

Official coding notes

Inclusion terms
  • Calcification of basal ganglia

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

NeurologistGeneral Physician

Coverage-related procedures and services

CPT 95921high
TESTING OF AUTONOMIC NERVOUS SYSTEM FUNCTION; CARDIOVAGAL INNERVATION (PARASYMPATHETIC FUNCTION), INCLUDING 2 OR MORE OF THE FOLLOWING: HEART RATE RESPONSE TO DEEP BREATHING WITH RECORDED R-R INTERVAL, VALSALVA RATIO, AND 30:15 RATIO
Source: CMS coverage guidance
CPT 95924high
TESTING OF AUTONOMIC NERVOUS SYSTEM FUNCTION; COMBINED PARASYMPATHETIC AND SYMPATHETIC ADRENERGIC FUNCTION TESTING WITH AT LEAST 5 MINUTES OF PASSIVE TILT
Source: CMS coverage guidance
CPT 95923high
TESTING OF AUTONOMIC NERVOUS SYSTEM FUNCTION; SUDOMOTOR, INCLUDING 1 OR MORE OF THE FOLLOWING: QUANTITATIVE SUDOMOTOR AXON REFLEX TEST (QSART), SILASTIC SWEAT IMPRINT, THERMOREGULATORY SWEAT TEST, AND CHANGES IN SYMPATHETIC SKIN POTENTIAL
Source: CMS coverage guidance
CPT 95922high
TESTING OF AUTONOMIC NERVOUS SYSTEM FUNCTION; VASOMOTOR ADRENERGIC INNERVATION (SYMPATHETIC ADRENERGIC FUNCTION), INCLUDING BEAT-TO-BEAT BLOOD PRESSURE AND R-R INTERVAL CHANGES DURING VALSALVA MANEUVER AND AT LEAST 5 MINUTES OF PASSIVE TILT
Source: CMS coverage guidance
CPT 92651high
AUDITORY EVOKED POTENTIALS; FOR HEARING STATUS DETERMINATION, BROADBAND STIMULI, WITH INTERPRETATION AND REPORT
Source: CMS coverage guidance
CPT 92652high
AUDITORY EVOKED POTENTIALS; FOR THRESHOLD ESTIMATION AT MULTIPLE FREQUENCIES, WITH INTERPRETATION AND REPORT
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
G23.8

Common synonyms

Other specified degenerative diseases of basal ganglia

Frequently asked questions

Code details

CodeG23.8
SystemICD10
Display nameOther specified degenerative diseases of basal ganglia
ChapterDiseases of the nervous system (G00-G99)
BlockExtrapyramidal and movement disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Atrophy, atrophic(of)Atrophy, atrophic(of)CalcificationDegeneration, degenerativeDegeneration, degenerativeDisease, diseasedDisease, diseasedDéjérine-Thomas atrophyFahr disease(of brain)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.