2027 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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 73 through 74. 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.
G63 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 75 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 75, ESRD (V21) category 75, ESRD (V24) category 75, and RxHCC Part D (V08) category 158 for payment year 2027.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G63.
Medicare Risk Adjustment (HCC)Billing
G63 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
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 associated with immunoglobulin M monoclonal gammopathy of uncertain significance
- Polyneuropathy caused by drug
- Polyneuropathy due to classical cystic fibrosis
- Polyneuropathy due to disorder of parathyroid gland
- Polyneuropathy due to systemic connective tissue disorder
- Polyneuropathy due to vitamin B deficiency
- 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G63: its own notes plus those printed at block G60-G65 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- polyneuropathy (in):
- diabetes mellitus (E08-E13 with .42)
- diphtheria (A36.83)
- infectious mononucleosis complicated by polyneuropathy (B27.0-B27.9 with fifth character 1)
- Lyme disease (A69.22)
- mumps (B26.84)
- postherpetic (B02.23)
- rheumatoid arthritis (M05.5-)
- scleroderma (M34.83)
- systemic lupus erythematosus (M32.19)
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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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
What is the ICD-10 code for polyneuropathy in diseases classified elsewhere?
The ICD-10-CM code for polyneuropathy in diseases classified elsewhere is G63. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does G63 group to?
On inpatient claims, polyneuropathy in diseases classified elsewhere maps to MS-DRG 74, 73, with relative weights from 1.0172 to 1.5773 depending on complications. Higher weights mean higher Medicare reimbursement.
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.
Can G63 be reported with A36.83?
Not as a rule. The Excludes1 note on G63 lists "diphtheria (A36.83)". 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).
Does G63 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. G63 mapped to HCC 75 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 75 (Myasthenia Gravis/Myoneural Disorders and Guillain-Barre Syndrome/Inflammatory and Toxic Neuropathy), ESRD (V21) category 75 (Polyneuropathy), ESRD (V24) category 75 (Myasthenia Gravis/Myoneural Disorders and Guillain-Barre Syndrome/Inflammatory and Toxic Neuropathy), and RxHCC Part D (V08) category 158 (Inflammatory and Toxic Neuropathy).
