G57.91 Unspecified mononeuropathy of right lower limb

Billable ICD-10-CM code, FY2026.

Applies from G57 Mononeuropathies of lower limb

Excludes1 (never code together)

• current traumatic nerve disorder - see nerve injury by body region

MS-DRG index

Defines the logic of DRG(s) 073-074 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 355.8 Mononeuritis of lower limb, unspecified (approximate)

Code annotations containing back-references to G57.91

Back-references to G57

• Type 1 Excludes: M79.2 Neuralgia and neuritis, unspecified ("mononeuropathies (G56-G58)")

Nearby codes

• G57.81 Other specified mononeuropathies of right lower limb
• G57.82 Other specified mononeuropathies of left lower limb
• G57.83 Other specified mononeuropathies of bilateral lower limbs
• G57.9 Unspecified mononeuropathy of lower limb
• G57.90 Unspecified mononeuropathy of unspecified lower limb
• G57.91 Unspecified mononeuropathy of right lower limb (this code)
• G57.92 Unspecified mononeuropathy of left lower limb
• G57.93 Unspecified mononeuropathy of bilateral lower limbs