A18.39 Retroperitoneal tuberculosis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Tuberculosis of mesenteric glands
• Tuberculosis of retroperitoneal (lymph glands)

MS-DRG index

Defines the logic of DRG(s) 371-373 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 014.80 Other tuberculosis of intestines, peritoneum, and mesenteric glands, unspecified (approximate)

Code annotations containing back-references to A18.39

Back-references to A18.39

• Type 2 Excludes: A18.2 Tuberculous peripheral lymphadenopathy ("tuberculosis of mesenteric and retroperitoneal lymph nodes (A18.39)")

Back-references to A18

• Type 2 Excludes: A31 Infection due to other mycobacteria ("tuberculosis (A15-A19)")

Diagnosis Index entries for A18.39

• Lymphadenitis › mesenteric (acute) (chronic) (nonspecific) (subacute) › tuberculous
• Tabes, tabetic › mesenterica
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › abdomen (lymph gland)
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › lymph gland or node (peripheral) › abdomen
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › lymph gland or node (peripheral) › mesenteric
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › lymph gland or node (peripheral) › retroperitoneal
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › mesentery, mesenteric (gland or node)
• Tuberculosis, tubercular, tuberculous (calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative) › retroperitoneal (lymph gland or node)

Nearby codes

• A18.18 Tuberculosis of other female genital organs
• A18.2 Tuberculous peripheral lymphadenopathy
• A18.3 Tuberculosis of intestines, peritoneum and mesenteric glands
• A18.31 Tuberculous peritonitis
• A18.32 Tuberculous enteritis
• A18.39 Retroperitoneal tuberculosis (this code)
• A18.4 Tuberculosis of skin and subcutaneous tissue
• A18.5 Tuberculosis of eye
• A18.50 Tuberculosis of eye, unspecified
• A18.51 Tuberculous episcleritis
• A18.52 Tuberculous keratitis