G56.2 ICD-10-CA code: Lesion of ulnar nerve
G56.2 is the ICD-10-CA code for “Lesion of ulnar nerve” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G56.2Lesion of ulnar nerve
ICD-10-CA · Canada · Also written G562
Index terms
Entries in CIHI’s alphabetical index that lead to G56.2. Searching the index by the condition the note names is how coders reach this code.
- Compression, nerve, ulnar
- Mononeuritis, ulnar nerve
- Palsy, ulnar nerve (tardy)
- Disorder (of), nerve, ulnar
- Slipped, slipping, ulnar nerve, nontraumatic
- Neuropathy, neuropathic, entrapment, ulnar nerve
Notes for G56.2
As CIHI prints them, with any note G56.2 takes from the headings above it.
Includes
- Cubital tunnel syndromeTardy ulnar nerve palsyUlnar nerve entrapment
Excludes
Conditions classified elsewhere.
- Ulnar nerve compression or entrapment in diabetes mellitus (E10.40/G59.0*) (E11.40/G59.0*) (E13.40/G59.0*) (E14.40/G59.0*)
- Current traumatic nerve disorder - see nerve injury by body regionFrom G56 Mononeuropathies of upper limb
- Current traumatic nerve, nerve root and plexus disorders - see nerve injury by body regionneuralgia NOS (M79.2)neuritis NOS (M79.2)peripheral neuritis in pregnancy (O26.8)radiculitis NOS (M54.1)From G50-G59 Nerve, nerve root and plexus disorders
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)
Where G56.2 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G50-G59Nerve, nerve root and plexus disorders
- 3Category G56Mononeuropathies of upper limb
- 4Valid code G56.2Lesion of ulnar nerve
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code G56.2 mean?
G56.2 is the ICD-10-CA code for “Lesion of ulnar nerve” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G56.2 in ICD-10-CA?
G56.2 sits under G56 Mononeuropathies of upper limb, within G50-G59 Nerve, nerve root and plexus disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G56.2?
ICD-10-CA lists Includes, Excludes notes for G56.2, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.