G57.72 Causalgia of left 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

Applies from G57.7 Causalgia of lower limb

Applicable to

• Complex regional pain syndrome II of lower limb

Excludes1 (never code together)

• complex regional pain syndrome I of lower limb (G90.52-)
• complex regional pain syndrome I of upper limb (G90.51-)
• complex regional pain syndrome II of upper limb (G56.4-)
• reflex sympathetic dystrophy of lower limb (G90.52-)
• reflex sympathetic dystrophy of upper limb (G90.51-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 355.71 Causalgia of lower limb (approximate)

Code annotations containing back-references to G57.72

Back-references to G57.7

• Type 1 Excludes: G56.4 Causalgia of upper limb ("complex regional pain syndrome II of lower limb (G57.7-)")
• Type 1 Excludes: G89.2 Chronic pain, not elsewhere classified ("causalgia, lower limb (G57.7-)")
• Type 1 Excludes: G89.2 Chronic pain, not elsewhere classified ("complex regional pain syndrome II, lower limb (G57.7-)")
• Type 1 Excludes: G90.5 Complex regional pain syndrome I (CRPS I) ("causalgia of lower limb (G57.7-)")
• Type 1 Excludes: G90.5 Complex regional pain syndrome I (CRPS I) ("complex regional pain syndrome II of lower limb (G57.7-)")
• Type 1 Excludes: M89.0 Algoneurodystrophy ("causalgia, lower limb (G57.7-)")
• Type 1 Excludes: M89.0 Algoneurodystrophy ("complex regional pain syndrome II, lower limb (G57.7-)")

Back-references to G57

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

Nearby codes

• G57.62 Lesion of plantar nerve, left lower limb
• G57.63 Lesion of plantar nerve, bilateral lower limbs
• G57.7 Causalgia of lower limb
• G57.70 Causalgia of unspecified lower limb
• G57.71 Causalgia of right lower limb
• G57.72 Causalgia of left lower limb (this code)
• G57.73 Causalgia of bilateral lower limbs
• G57.8 Other specified mononeuropathies of lower limb
• G57.80 Other specified mononeuropathies of unspecified lower limb
• G57.81 Other specified mononeuropathies of right lower limb
• G57.82 Other specified mononeuropathies of left lower limb