G56.20 is the authoritative medical code for Lesion of ulnar nerve, unspecified upper limb. This classification is used in medical billing and clinical recording to specify the clinical criteria for lesion of ulnar nerve, unspecified upper limb (ICD-10-CM G56.20), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Lesion of ulnar nerve, unspecified upper limb is a billable ICD-10-CM diagnosis code G56.20. Excludes1 (not coded here): current traumatic nerve disorder - see nerve injury by body region; current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region; neuralgia NOS M79.2; neuritis NOS M79.2; peripheral neuritis in pregnancy O26.82-; radiculitis NOS M54.1-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for G56.20 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- current traumatic nerve disorder - see nerve injury by body region
- current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
- neuralgia NOS M79.2
- neuritis NOS M79.2
- peripheral neuritis in pregnancy O26.82-
- radiculitis NOS M54.1-
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with G56.20?
Per Excludes1 instructions, G56.20 must not be reported with: current traumatic nerve disorder - see nerve injury by body region; current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region; neuralgia NOS (M79.2); neuritis NOS (M79.2).
Codes in This Family (35)
Official ICD-10-CM classifications in the same code family as G56.20, with their registry titles.
- G56 — Mononeuropathies of upper limb
- G56.0 — Carpal tunnel syndrome
- G56.00 — Carpal tunnel syndrome, unspecified upper limb
- G56.01 — Carpal tunnel syndrome, right upper limb
- G56.02 — Carpal tunnel syndrome, left upper limb
- G56.03 — Carpal tunnel syndrome, bilateral upper limbs
- G56.1 — Other lesions of median nerve
- G56.10 — Other lesions of median nerve, unspecified upper limb
- G56.11 — Other lesions of median nerve, right upper limb
- G56.12 — Other lesions of median nerve, left upper limb
- G56.13 — Other lesions of median nerve, bilateral upper limbs
- G56.2 — Lesion of ulnar nerve
- G56.21 — Lesion of ulnar nerve, right upper limb
- G56.22 — Lesion of ulnar nerve, left upper limb
- G56.23 — Lesion of ulnar nerve, bilateral upper limbs
- G56.3 — Lesion of radial nerve
- G56.30 — Lesion of radial nerve, unspecified upper limb
- G56.31 — Lesion of radial nerve, right upper limb
- G56.32 — Lesion of radial nerve, left upper limb
- G56.33 — Lesion of radial nerve, bilateral upper limbs
- G56.4 — Causalgia of upper limb
- G56.40 — Causalgia of unspecified upper limb
- G56.41 — Causalgia of right upper limb
- G56.42 — Causalgia of left upper limb
- G56.43 — Causalgia of bilateral upper limbs
- G56.8 — Other specified mononeuropathies of upper limb
- G56.80 — Other specified mononeuropathies of unspecified upper limb
- G56.81 — Other specified mononeuropathies of right upper limb
- G56.82 — Other specified mononeuropathies of left upper limb
- G56.83 — Other specified mononeuropathies of bilateral upper limbs
- G56.9 — Unspecified mononeuropathy of upper limb
- G56.90 — Unspecified mononeuropathy of unspecified upper limb
- G56.91 — Unspecified mononeuropathy of right upper limb
- G56.92 — Unspecified mononeuropathy of left upper limb
- G56.93 — Unspecified mononeuropathy of bilateral upper limbs
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: