2026 ICD-10-CM Diagnosis Code A18.02Tuberculous arthritis of other joints
ICD-10-CM Codes›A00–B99›A15-A19›A18
- Billable — Valid for Submission
- Chronic Condition
A18.02 is a billable ICD-10-CM diagnosis code for tuberculous arthritis of other joints. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 485 through 487, 548 through 550, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Infective arthritis and Tuberculosis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Arthritis of bilateral knee joints caused by bacteria
- Arthritis of left knee caused by bacteria
- Arthritis of right knee caused by bacteria
- Bilateral infective arthritis of knees
- Infection of musculoskeletal system caused by Mycobacterium tuberculosis
- Tuberculosis of bilateral knee joints
- Tuberculosis of bones and/or joints
- Tuberculosis of hip
- Tuberculosis of knee
- Tuberculosis of left knee joint
- Tuberculosis of right knee joint
- Tuberculous arthritis
- Tuberculous arthritis of hand caused by Mycobacterium tuberculosis
- Tuberculous arthritis of shoulder region caused by Mycobacterium tuberculosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Tuberculosis of hip (joint)
- Tuberculosis of knee (joint)
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Caries
- hip (tuberculous) - A18.02
- knee (tuberculous) - A18.02
- Chondritis - M94.8X9
- tuberculous NEC - A18.02
- Coxalgia, coxalgic (nontuberculous) - See Also: Pain, joint, hip;
- tuberculous - A18.02
- Cyst (colloid) (mucous) (simple) (retention)
- tuberculous - A18.02
- Disease, diseased - See Also: Syndrome;
- hip (joint) - M25.9
- tuberculous - A18.02
- Inflammation, inflamed, inflammatory (with exudation)
- knee (joint) - M13.169
- tuberculous - A18.02
- Morbus - See Also: Disease;
- coxae senilis - M16.9
- tuberculous - A18.02
- Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) - A15.9
- ankle (joint) (bone) - A18.02
- arthritis (chronic) (synovial) - A18.02
- cartilage - A18.02
- coxae - A18.02
- coxalgia - A18.02
- elbow - A18.02
- genu - A18.02
- hip (joint) (disease) (bone) - A18.02
- joint - A18.02
- knee (joint) - A18.02
- shoulder (joint) - A18.02
- sternoclavicular joint - A18.02
- swelling, joint (see also category M01) - See Also: Tuberculosis, joint; - A18.02
- symphysis pubis - A18.02
- articular - A18.02
- wrist (joint) - A18.02
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)
- tuberculous
- Caries
- hip (tuberculous)
- Caries
- knee (tuberculous)
- Chondritis
- tuberculous NEC
- Coxalgia, coxalgic(nontuberculous)
- tuberculous
- Cyst(colloid) (mucous) (simple) (retention)
- Baker's
- tuberculous
- Disease, diseased
- hip (joint)
- tuberculous
- Inflammation, inflamed, inflammatory(with exudation)
- knee (joint)
- tuberculous
- Morbus
- coxae senilis
- tuberculous
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- bone
- hip
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- bone
- knee
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- hip
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- joint NEC
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- joint NEC
- hip
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- joint NEC
- knee
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- joint NEC
- specified NEC
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- knee
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- ankle (joint) (bone)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- arthritis (chronic) (synovial)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- bone
- hip
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- bone
- knee
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- cartilage
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- coxae
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- coxalgia
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- elbow
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- genu
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- hip (joint) (disease) (bone)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- joint
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- knee (joint)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- shoulder (joint)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- sternoclavicular joint
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- swelling, joint (see also category M01)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- symphysis pubis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- synovitis
- articular
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- wrist (joint)
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Infectious Arthritis
Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial, viral, or fungal infection that spreads from another part of the body. Symptoms of infectious arthritis include:
Read the full article at MedlinePlus
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Convert A18.02 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A18.02Overview
Is A18.02 (Tuberculosis of bones and joints) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report tuberculous arthritis of other joints on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does A18.02 group to?
When tuberculous arthritis of other joints is the principal diagnosis on an inpatient stay, it groups to MS-DRG 485, 486, 487, 548, 549, 550, 974, 975, 976, with relative weights from 0.8741 to 3.2271 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of A18.02?
Under the General Equivalence Mappings, tuberculous arthritis of other joints converts to ICD-9-CM 015.10 (TB of hip-unspec), 015.20 (TB of knee-unspec), and 015.80 (TB of joint NEC-unspec). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
