2026 ICD-10-CM Diagnosis Code A18.01Tuberculosis of spine
ICD-10-CM Codes›A00–B99›A15-A19›A18
- Billable — Valid for Submission
- Chronic Condition
A18.01 is a billable ICD-10-CM diagnosis code for tuberculosis of spine. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 456 through 458, 539 through 541, 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.
- Infection of cervicothoracic region of spine caused by Mycobacterium tuberculosis
- Infection of multiple sites of spine caused by Mycobacterium tuberculosis
- Infection of musculoskeletal system caused by Mycobacterium tuberculosis
- Infection of sacrum
- Infection of thoracic spine
- Infection of thoracolumbar region of spine caused by Mycobacterium tuberculosis
- Pott's curvature
- Secondary kyphosis
- Tuberculosis of cervical spine
- Tuberculosis of lumbar spine
- Tuberculosis of lumbosacral spine
- Tuberculosis of the bones of multiple sites
- Tuberculosis of thoracic spine
- Tuberculosis of vertebral column
- Tuberculous abscess
- Tuberculous abscess of sacrum
- Tuberculous spinal cord compression
- Vertebral abscess
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Pott's disease or curvature of spine
- Tuberculous arthritis
- Tuberculous osteomyelitis of spine
- Tuberculous spondylitis
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.
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) - L02.91
- bone (subperiosteal) - See Also: Osteomyelitis, specified type NEC;
- spinal (tuberculous) - A18.01
- joint - See: Arthritis, pyogenic or pyemic;
- spine (tuberculous) - A18.01
- lumbar (tuberculous) - A18.01
- sacrum (tuberculous) - A18.01
- spine (column) (tuberculous) - A18.01
- vertebra (column) (tuberculous) - A18.01
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) - M19.90
- spine - See Also: Spondylosis;
- tuberculous - A18.01
- tuberculous - A18.02
- spine - A18.01
- Caries
- sacrum (tuberculous) - A18.01
- spine, spinal (column) (tuberculous) - A18.01
- vertebra (column) (tuberculous) - A18.01
- Chondritis - M94.8X9
- intervertebral - A18.01
- Pott's (spinal) - A18.01
- spine (acquired) (angular) (idiopathic) (incorrect) (postural) - See: Dorsopathy, deforming;
- tuberculosis (Pott's curvature) - A18.01
- tuberculous - A18.01
- Disease, diseased - See Also: Syndrome;
- spine - See Also: Spondylopathy;
- tuberculous - A18.01
- lumbar, tuberculous - A18.01
- spine
- tuberculous - A18.01
- Kyphoscoliosis, kyphoscoliotic (acquired) - See Also: Scoliosis; - M41.9
- tuberculous - A18.01
- Kyphosis, kyphotic (acquired) - M40.209
- tuberculous - A18.01
- tuberculous - A18.01
- Necrosis, necrotic (ischemic) - See Also: Gangrene;
- vertebra - See Also: Osteonecrosis, by type, vertebra;
- tuberculous - A18.01
- Pott's - A18.01
- Pott's
- curvature (spinal) - A18.01
- disease or paraplegia - A18.01
- spinal curvature - A18.01
- Scoliosis (acquired) (postural) - M41.9
- tuberculous - A18.01
- Spondylitis (chronic) - See Also: Spondylopathy, inflammatory;
- tuberculosis - A18.01
- tuberculous - A18.01
- Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) - A15.9
- arthritis (chronic) (synovial) - A18.02
- spine or vertebra (column) - A18.01
- sacrum - A18.01
- spine or vertebral column - A18.01
- intervertebral - A18.01
- curvature, spine - A18.01
- vertebral - A18.01
- kyphosis, kyphoscoliosis - A18.01
- lordosis - A18.01
- sacroiliac (joint) - A18.01
- sacrum - A18.01
- scoliosis - A18.01
- spine, spinal (column) - A18.01
- spondylitis - A18.01
- spine or vertebra - A18.01
- tenosynovitis - A18.09
- spine or vertebra - A18.01
- vertebra (column) - A18.01
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- bone (subperiosteal)
- spinal (tuberculous)
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- joint
- spine (tuberculous)
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- lumbar (tuberculous)
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- sacrum (tuberculous)
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- spine (column) (tuberculous)
- Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- vertebra (column) (tuberculous)
- Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)
- spine
- tuberculous
- Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute)
- tuberculous
- spine
- Caries
- sacrum (tuberculous)
- Caries
- spine, spinal (column) (tuberculous)
- Caries
- vertebra (column) (tuberculous)
- Chondritis
- tuberculous NEC
- intervertebral
- Curvature
- Pott's (spinal)
- Curvature
- spine (acquired) (angular) (idiopathic) (incorrect) (postural)
- due to or associated with
- tuberculosis (Pott's curvature)
- Curvature
- spine (acquired) (angular) (idiopathic) (incorrect) (postural)
- tuberculous
- Disease, diseased
- spine
- tuberculous
- Fistula(cutaneous)
- lumbar, tuberculous
- Granuloma
- spine
- tuberculous
- Kyphoscoliosis, kyphoscoliotic(acquired)
- tuberculous
- Kyphosis, kyphotic(acquired)
- tuberculous
- Lordosis
- tuberculous
- Necrosis, necrotic(ischemic)
- vertebra
- tuberculous
- Paraplegia(lower)
- Pott's
- Pott's
- curvature (spinal)
- Pott's
- disease or paraplegia
- Pott's
- spinal curvature
- Rust's disease(tuberculous cervical spondylitis)
- Scoliosis(acquired) (postural)
- tuberculous
- Spondylitis(chronic)
- in (due to)
- tuberculosis
- Spondylitis(chronic)
- tuberculous
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- bone
- sacrum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- bone
- spinal
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- bone
- vertebra
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- joint NEC
- vertebral
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- lumbar (spine)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- sacrum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- abscess (respiratory)
- spine or vertebra (column)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- arthritis (chronic) (synovial)
- spine or vertebra (column)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- bone
- sacrum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- bone
- spine or vertebral column
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- cartilage
- intervertebral
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- curvature, spine
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- joint
- vertebral
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- kyphosis, kyphoscoliosis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- lordosis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- sacroiliac (joint)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- sacrum
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- scoliosis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- spine, spinal (column)
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- spondylitis
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- synovitis
- spine or vertebra
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- tenosynovitis
- spine or vertebra
- Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
- vertebra (column)
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- spine (tuberculous)
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Tuberculous Abscess
an abscess resulting from infection by mycobacterium tuberculosis.
Patient EducationClinical
Spine Injuries and Disorders
Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A18.01 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A18.01Overview
Is A18.01 (Tuberculosis of bones and joints) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report tuberculosis of spine on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does A18.01 group to?
When tuberculosis of spine is the principal diagnosis on an inpatient stay, it groups to MS-DRG 456, 457, 458, 539, 540, 541, 974, 975, 976, with relative weights from 0.7715 to 8.4034 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of A18.01?
Under the General Equivalence Mappings, tuberculosis of spine converts to ICD-9-CM 015.00 (TB of vertebra-unspec), 015.00 (TB of vertebra-unspec), and 737.40 (spin curv NOS in oth dis). 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.
