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M01.23 ICD-10-CA code: Arthritis in Lyme disease, forearm

M01.23 is the ICD-10-CA code for “Arthritis in Lyme disease, forearm” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M01.23

Arthritis in Lyme disease, forearm

Short description: Arthritis in Lyme disease forearm

ICD-10-CA · Canada · Also written M0123

Notes for M01.23

As CIHI prints them, with any note M01.23 takes from the headings above it.

Includes

Excludes

Conditions classified elsewhere.

  • Arthropathy in sarcoidosis (M14.8*)postinfective and reactive arthropathy (M03.-*)From M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere
  • Certain:• conditions originating in the perinatal period (P00-P96)• disorders of the temporomandibular joint (K07.6)• infectious and parasitic diseases (A00-B99)compartment syndrome (T79.6)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 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Note

  • This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.From M00-M03 Infectious arthropathies
  • The following fifth characters represent the following sites of involvement:0 Multiple sites1 Shoulder region: clavical , scapula — joint acromioclavicular, glenohumeral, sternoclavicular2 Upper arm: humerus — elbow joint,3 Forearm: radius , ulna — wrist joint,4 Hand: carpus, fingers, metacarpus — joints between these bones,5 Pelvic region and thigh: buttock , femur , pelvis — joint hip , sacroiliac6 Lower leg: fibula , tibia — knee joint7 Ankle and foot: metatarsus, tarsus, toes — other joints in foot8 Other:head neck ribs skull trunk vertebral column9 Site unspecifiedFrom Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Where M01.23 sits

  1. 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. 2Block M00-M25Arthropathies
  3. 3Block M00-M03Infectious arthropathies
  4. 4Category M01Direct infections of joint in infectious and parasitic diseases classified elsewhere
  5. 5Subcategory M01.2Arthritis in Lyme disease
  6. 6Valid code M01.23Arthritis in Lyme disease, forearm

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.

See M01.23 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M01.23 mean?

M01.23 is the ICD-10-CA code for “Arthritis in Lyme disease, forearm” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M01.23 in ICD-10-CA?

M01.23 sits under M01.2 Arthritis in Lyme disease, within M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere, within M00-M03 Infectious arthropathies, within M00-M25 Arthropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).

What coding notes apply to M01.23?

ICD-10-CA lists Excludes, Note, Includes notes for M01.23, 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.

Codes beside M01.23

M01.20Arthritis in Lyme disease, multiple sitesM01.21Arthritis in Lyme disease, shoulder regionM01.22Arthritis in Lyme disease, upper armM01.24Arthritis in Lyme disease handM01.25Arthritis in Lyme disease, pelvic region and thighM01.26Arthritis in Lyme disease, lower legM01.27Arthritis in Lyme disease, ankle and footM01.28Arthritis in Lyme disease, other siteM01.29Arthritis in Lyme disease, unspecified site