ICD-10 G59
Billable / SpecificMononeuropathy in diseases classified elsewhere
About ICD-10-CM G59
ICD-10-CM code G59 represents Mononeuropathy in diseases classified elsewhere. This is a billable/specific code in the Nervous System chapter (block G59). The 2026 edition of ICD-10-CM G59 became effective on October 1, 2025.
Type 1 Excludes
Pure excludes, these codes can never be coded together with G59. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- diabetic mononeuropathy (E08-E13 with .41)
- syphilitic nerve paralysis (A52.19)
- syphilitic neuritis (A52.15)
- tuberculous mononeuropathy (A17.83)
Coding Notes
Code First
- underlying disease
Medicare LCD Coverage for G59
Local Coverage Determinations (LCDs) from CMS MACs that list G59 as a covered diagnosis.
Showing top 10 of 446 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G59.
2 Aetna
1 Cigna
5 Medicare
CPT Codes Commonly Billed with G59
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 64596 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64598 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64570 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64597 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64569 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64581 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64590 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64555 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64595 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64585 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
Convert G59 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| G59 | 3559 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G59
Other codes in section G50-G59 (Nerve, nerve root and plexus disorders).
ICD-10 G59, Billing FAQ
Is ICD-10 code G59 billable? +
Yes, G59 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for G59? +
Type 1 Excludes (never code together with G59): diabetic mononeuropathy (E08-E13 with .41); syphilitic nerve paralysis (A52.19); syphilitic neuritis (A52.15)
What CPT codes are commonly billed with G59? +
Procedures frequently paired with G59 include: 64596, 64598, 64570, 64597, 64569.
What ICD-9 codes does G59 map to? +
Per CMS GEMs, G59 maps to ICD-9 codes: 3559. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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