2027 ICD-10-CM Diagnosis Code G32.89Other specified degenerative disorders of nervous system in diseases classified elsewhere
ICD-10-CM Codes›G00–G99›G30-G32›G32
- Billable — Valid for Submission
- Chronic Condition
G32.89 is a billable ICD-10-CM diagnosis code for other specified degenerative disorders of nervous system in diseases classified elsewhere. 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. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (often hereditary or degenerative).
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G32.89.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cerebral degeneration associated with another disorder
- Cerebral degeneration associated with generalized lipidosis
- Cerebral degeneration due to cerebrovascular disease
- Cerebral degeneration due to hypothyroidism
- Cerebral degeneration due to neoplastic disease
- Cerebral degeneration due to progressive multifocal leukoencephalopathy
- Cerebral degeneration due to vitamin B12 deficiency
- Cerebral degeneration in Niemann-Pick disease
- Encephalopathy due to folate deficiency
- Encephalopathy due to multiple nutrient deficiencies
- Encephalopathy due to nutritional deficiency
- Encephalopathy due to vitamin B12 deficiency
- Encephalopathy due to vitamin deficiency
- Infantile inflammatory bowel disease with neurological involvement
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G32.89: its own notes plus those printed at G32.8 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Degenerative encephalopathy in diseases classified elsewhere
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- 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 First
The underlying condition named in the note is sequenced before this code.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
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.
Patient EducationClinical
Degenerative Nerve Diseases
Degenerative nerve diseases affect many of your body's activities, such as balance, movement, talking, breathing, and heart function. Many of these diseases are genetic. Sometimes the cause is a medical condition such as alcoholism, a tumor, or a stroke. Other causes may include toxins, chemicals, and viruses.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G32.89 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G32.89Overview
Is G32.89 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified degenerative disorders of nervous system in diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G32.89 group to?
On inpatient claims, other specified degenerative disorders of nervous system in diseases classified elsewhere maps to MS-DRG 72, 70, 71, with relative weights from 0.7344 to 1.6089 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G32.89 be a principal diagnosis?
No. This is a manifestation code: other specified degenerative disorders of nervous system in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Can G32.89 be reported with E51.2?
Not as a rule. The Excludes1 note at G32.8, which applies to G32.89, lists "superior hemorrhagic polioencephalitis [Wernicke's encephalopathy] (E51.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is coded first with G32.89?
The Code First note at G32.8, which applies to G32.89, reads: underlying disease, such as: amyloidosis cerebral degeneration (E85.-); cerebral degeneration (due to) hypothyroidism (E00.0-E03.9); cerebral degeneration (due to) neoplasm (C00-D49); cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-). When one of these applies, it is sequenced before G32.89.
