2026 ICD-10-CM Diagnosis Code G63Polyneuropathy in diseases classified elsewhere
ICD-10-CM Codes›G00–G99›G60-G65›G63
- Billable — Valid for Submission
- Chronic Condition
G63 is a billable ICD-10-CM diagnosis code for polyneuropathy in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). 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 Polyneuropathies.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G63.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bacterial infection of peripheral nerve
- Cytomegaloviral polyneuropathy
- Gouty neuritis
- Hepatic neuropathy
- Leprosy neuropathy
- Leprosy polyneuropathy
- Myxedema neuropathy
- Neurological disorder due to obesity
- Neurolymphomatosis
- Neuropathy associated with dysproteinemias
- Neuropathy associated with endocrine disorder
- Neuropathy associated with hypoglycemia
- Neuropathy caused by bacterial toxin
- Neuropathy due to folic acid deficiency
- Neuropathy due to nutritional deficiency
- Neuropathy due to obesity
- Neuropathy due to vitamin B deficiency
- Neuropathy in acromegaly
- Neuropathy in benign monoclonal gammopathy
- Neuropathy in blood dyscrasias
- Neuropathy in cryoglobulinemia
- Neuropathy in macroglobulinemia
- Neuropathy in renal failure
- Niacin deficiency
- Paraneoplastic neuropathy
- Paraneoplastic peripheral neuropathy
- Pellagra
- Pellagra neuropathy
- Peripheral neuropathy caused by toxin
- Peripheral neuropathy due to multiple micronutrient deficiencies
- Peripheral neuropathy due to obesity
- Peripheral neuropathy due to overweight
- POEMS syndrome
- Polyneuropathy associated with another disorder
- Polyneuropathy caused by drug
- Polyneuropathy co-occurrent and due to systemic connective tissue disorder
- Polyneuropathy due to classical cystic fibrosis
- Polyneuropathy due to disorder of parathyroid gland
- Polyneuropathy due to vitamin B deficiency
- Polyneuropathy in collagen malignant disease
- Polyneuropathy in collagen vascular disease
- Polyneuropathy in disseminated lupus erythematosus
- Polyneuropathy in pellagra
- Polyneuropathy in polyarteritis nodosa
- Polyneuropathy in rheumatoid arthritis
- Porphyric polyneuropathy
- Secondary peripheral neuropathy
- Sensory polyneuropathy
- Sensory polyneuropathy due to vitamin E deficiency
- Toxic polyneuropathy
- Uremic neuropathy
- Uremic polyneuropathy
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- underlying disease, such as:
- amyloidosis E85
- endocrine disease, except diabetes E00 E07 E15 E16 E20 E34
- metabolic diseases E70 E88
- neoplasm C00 D49
- nutritional deficiency E40 E64
Type 1 Excludes
- polyneuropathy (in):
- diabetes mellitus E08 E13
- diphtheria A36.83
- infectious mononucleosis complicated by polyneuropathy B27.0 B27.9
- Lyme disease A69.22
- mumps B26.84
- postherpetic B02.23
- rheumatoid arthritis M05.5
- scleroderma M34.83
- systemic lupus erythematosus M32.19
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Pellagra
a disease due to deficiency of niacin, a b-complex vitamin, or its precursor tryptophan. it is characterized by scaly dermatitis which is often associated with diarrhea and dementia (the three d's).Herpesvirus 2, Gallid
the type species of the genus mardivirus in the family herpesviridae. it is the etiologic agent of marek disease, infecting domestic fowl and wild birds.Neurolymphomatosis
infiltration of the nervous system by malignant lymphoma cells.POEMS Syndrome
a multisystemic disorder characterized by a sensorimotor polyneuropathy (polyneuropathies), organomegaly, endocrinopathy, monoclonal gammopathy, and pigmentary skin changes. other clinical features which may be present include edema; cachexia; microangiopathic glomerulopathy; pulmonary hypertension (hypertension, pulmonary); cutaneous necrosis; thrombocytosis; and polycythemia. this disorder is frequently associated with osteosclerotic myeloma. (from adams et al., principles of neurology, 6th ed, p1335; rev med interne 1997;18(7):553-62)Chronic Toxic Polyneuropathy
neuropathy affecting multiple nerves that is caused by prolonged exposure to toxic substances.Uremic Neuropathy
neuropathy resulting from uremia.Toxic Polyneuropathy
polyneuropathy that is caused by exposure to toxins.
Patient EducationClinical
Peripheral Nerve Disorders
Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs.
The full article covers:
- What are peripheral nerves?
- What are peripheral nerve disorders?
- What causes peripheral nerve disorders?
- What are the symptoms of peripheral nerve disorders?
- How are peripheral nerve disorders diagnosed?
- What are the treatments for peripheral nerve disorders?
- Can peripheral nerve disorders be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G63 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G63Overview
Is G63 (Polyneuropathy in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report polyneuropathy in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can G63 be a principal diagnosis?
No. This is a manifestation code: polyneuropathy in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of G63?
Under the General Equivalence Mappings, polyneuropathy in diseases classified elsewhere converts to ICD-9-CM 357.4 (neuropathy in other dis). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
