DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A18 Tuberculosis of other organs

  • Header · not billable

A18 is not billable. The category heads 32 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

  • Acnitis (primary) → A18.4
  • Adrenalism, tuberculous → A18.7
  • Keratoscleritis, tuberculous → A18.52

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A15-A19 Tuberculosis (A15-A19)
  3. A18 Tuberculosis of other organs
Billable codes
32
Subdivisions
9
CC / MCC codes
31 / 1
HCC V28 codes
0
New FY2027
0
Index entries
463

Codes in A18

  1. A18.0
    Tuberculosis of bones and joints
    Header
  2. A18.01
    Tuberculosis of spine
    BillableCC
    Inclusion terms 4

    Inclusion terms

    • Pott's disease or curvature of spine
    • Tuberculous arthritis
    • Tuberculous osteomyelitis of spine
    • Tuberculous spondylitis
  3. A18.02
    Tuberculous arthritis of other joints
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculosis of hip (joint)
    • Tuberculosis of knee (joint)
  4. A18.03
    Tuberculosis of other bones
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculous mastoiditis
    • Tuberculous osteomyelitis
  5. A18.09
    Other musculoskeletal tuberculosis
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Tuberculous myositis
    • Tuberculous synovitis
    • Tuberculous tenosynovitis
  6. A18.1
    Tuberculosis of genitourinary system
    Header
  7. A18.10
    Tuberculosis of genitourinary system, unspecified
    BillableCC
  8. A18.11
    Tuberculosis of kidney and ureter
    BillableCC
  9. A18.12
    Tuberculosis of bladder
    BillableCC
  10. A18.13
    Tuberculosis of other urinary organs
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Tuberculous urethritis
  11. A18.14
    Tuberculosis of prostate
    BillableCC
  12. A18.15
    Tuberculosis of other male genital organs
    BillableCC
  13. A18.16
    Tuberculosis of cervix
    BillableCC
  14. A18.17
    Tuberculous female pelvic inflammatory disease
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculous endometritis
    • Tuberculous oophoritis and salpingitis
  15. A18.18
    Tuberculosis of other female genital organs
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Tuberculous ulceration of vulva
  16. A18.2
    Tuberculous peripheral lymphadenopathy
    BillableCC
    Inclusion terms 1, Excludes2 3

    Inclusion terms

    • Tuberculous adenitis

    Excludes2

    • tuberculosis of bronchial and mediastinal lymph nodes (A15.4) A15.4
    • tuberculosis of mesenteric and retroperitoneal lymph nodes (A18.39) A18.39
    • tuberculous tracheobronchial adenopathy (A15.4) A15.4
  17. A18.3
    Tuberculosis of intestines, peritoneum and mesenteric glands
    Header
  18. A18.31
    Tuberculous peritonitis
    BillableMCC
    Inclusion terms 1

    Inclusion terms

    • Tuberculous ascites
  19. A18.32
    Tuberculous enteritis
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculosis of anus and rectum
    • Tuberculosis of intestine (large) (small)
  20. A18.39
    Retroperitoneal tuberculosis
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculosis of mesenteric glands
    • Tuberculosis of retroperitoneal (lymph glands)
  21. A18.4
    Tuberculosis of skin and subcutaneous tissue
    BillableCC
    Inclusion terms 6, Excludes2 2

    Inclusion terms

    • Erythema induratum, tuberculous
    • Lupus exedens
    • Lupus vulgaris NOS
    • Lupus vulgaris of eyelid
    • Scrofuloderma
    • Tuberculosis of external ear

    Excludes2

    • lupus erythematosus (L93.-) L93
    • systemic lupus erythematosus (M32.-) M32
  22. A18.5
    Tuberculosis of eye
    Header
    Excludes2 1

    Excludes2

    • lupus vulgaris of eyelid (A18.4) A18.4
  23. A18.50
    Tuberculosis of eye, unspecified
    BillableCC
  24. A18.51
    Tuberculous episcleritis
    BillableCC
  25. A18.52
    Tuberculous keratitis
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculous interstitial keratitis
    • Tuberculous keratoconjunctivitis (interstitial) (phlyctenular)
  26. A18.53
    Tuberculous chorioretinitis
    BillableCC
  27. A18.54
    Tuberculous iridocyclitis
    BillableCC
  28. A18.59
    Other tuberculosis of eye
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Tuberculous conjunctivitis
  29. A18.6
    Tuberculosis of (inner) (middle) ear
    BillableCC
    Inclusion terms 1, Excludes2 2

    Inclusion terms

    • Tuberculous otitis media

    Excludes2

    • tuberculosis of external ear (A18.4) A18.4
    • tuberculous mastoiditis (A18.03) A18.03
  30. A18.7
    Tuberculosis of adrenal glands
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Tuberculous Addison's disease
  31. A18.8
    Tuberculosis of other specified organs
    Header
  32. A18.81
    Tuberculosis of thyroid gland
    BillableCC
  33. A18.82
    Tuberculosis of other endocrine glands
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculosis of pituitary gland
    • Tuberculosis of thymus gland
  34. A18.83
    Tuberculosis of digestive tract organs, not elsewhere classified
    BillableCC
    Excludes1 1

    Excludes1

    • tuberculosis of intestine (A18.32) A18.32
  35. A18.84
    Tuberculosis of heart
    BillableCC
    Inclusion terms 4

    Inclusion terms

    • Tuberculous cardiomyopathy
    • Tuberculous endocarditis
    • Tuberculous myocarditis
    • Tuberculous pericarditis
  36. A18.85
    Tuberculosis of spleen
    BillableCC
  37. A18.89
    Tuberculosis of other sites
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Tuberculosis of muscle
    • Tuberculous cerebral arteritis

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Block A15-A19 instructions (Includes 1, Excludes1 7, Use additional code 1): printed on the block page.

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Rust's disease (tuberculous cervical spondylitis) → A18.01
  • Poncet's disease (tuberculous rheumatism) → A18.09
  • Caseation lymphatic gland (tuberculous) → A18.2
  • Scrofula, scrofulosis (tuberculosis of cervical lymph glands) → A18.2
  • Acnitis (primary) → A18.4
  • Bazin's disease (primary) (tuberculous) → A18.4
  • Lichenoides tuberculosis (primary) → A18.4
  • Scrofulide (primary) (tuberculous) → A18.4
  • Scrofuloderma, scrofulodermia (any site) (primary) → A18.4
  • Scrofulosus lichen (primary) (tuberculous) → A18.4
  • Tuberculid, tuberculide (indurating, subcutaneous) (lichenoid) (miliary) (papulonecrotic) (primary) (skin) → A18.4
  • Keratoscleritis, tuberculous → A18.52
  • Adrenalism, tuberculous → A18.7
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)lumbar (tuberculous) → A18.01
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)sacrum (tuberculous) → A18.01
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)spine (column) (tuberculous) → A18.01
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)vertebra (column) (tuberculous) → A18.01
  • Cariessacrum (tuberculous) → A18.01
  • Cariesspine, spinal (column) (tuberculous) → A18.01
  • Cariesvertebra (column) (tuberculous) → A18.01
  • CurvaturePott's (spinal) → A18.01
  • Fistula (cutaneous)lumbar, tuberculous → A18.01
  • Kyphoscoliosis, kyphoscoliotic (acquired)tuberculous → A18.01
  • Kyphosis, kyphotic (acquired)tuberculous → A18.01
  • Lordosistuberculous → A18.01
  • Paraplegia (lower)Pott's → A18.01
  • Pott'scurvature (spinal) → A18.01
  • Pott'sdisease or paraplegia → A18.01
  • Pott'sspinal curvature → A18.01
  • Scoliosis (acquired) (postural)tuberculous → A18.01
  • Spondylitis (chronic)tuberculous → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)curvature, spine → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)kyphosis, kyphoscoliosis → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)lordosis → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)sacroiliac (joint) → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)sacrum → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)scoliosis → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)spine, spinal (column) → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)spondylitis → A18.01
  • Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)vertebra (column) → A18.01

423 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy