ICD-10-CM Code For Tuberculosis Of Other Organs: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A18 includes diagnoses for extrapulmonary tuberculosis involving sites such as bones and joints, lymph nodes, genitourinary system, skin, and the central nervous system. These ICD-10-CM diagnosis codes are used to document organ-specific tuberculosis manifestations, capturing severity, site of infection, and clinical complexity relevant to this group. Accurate coding within the ICD-10-CM A18 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM A18: Tuberculosis Of Other Organs Overview

The ICD-10-CM A18 group represents tuberculosis infections affecting organs and sites other than the lungs, such as bones, lymph nodes, genitourinary system, and central nervous system. These codes describe extrapulmonary manifestations of Mycobacterium tuberculosis complex and related species. Accurate coding is important for complete clinical documentation and supports appropriate reimbursement for care related to organ-specific tuberculosis management.

When to Use

Use a code from this group when clinical documentation confirms tuberculosis infection localized to an organ or site other than the lungs. Select the code that identifies the specific organ involvement and any laterality or complications documented in the medical record.

ICD-10-CM Codes

32 rows

ICD-10-CM Code	Description
A18.01	Tuberculosis of spine
A18.02	Tuberculous arthritis of other joints
A18.03	Tuberculosis of other bones
A18.09	Other musculoskeletal tuberculosis
A18.10	Tuberculosis of genitourinary system, unspecified
A18.11	Tuberculosis of kidney and ureter
A18.12	Tuberculosis of bladder
A18.13	Tuberculosis of other urinary organs
A18.14	Tuberculosis of prostate
A18.15	Tuberculosis of other male genital organs
A18.16	Tuberculosis of cervix
A18.17	Tuberculous female pelvic inflammatory disease
A18.18	Tuberculosis of other female genital organs
A18.2	Tuberculous peripheral lymphadenopathy
A18.31	Tuberculous peritonitis
A18.32	Tuberculous enteritis
A18.39	Retroperitoneal tuberculosis
A18.4	Tuberculosis of skin and subcutaneous tissue
A18.50	Tuberculosis of eye, unspecified
A18.51	Tuberculous episcleritis

Showing 1–20 of 32

DRG Codes

43 rows

DRG Code	Description
124	Other Disorders of the Eye with MCC or Thrombolytic Agent
125	Other Disorders of the Eye without MCC
154	Other Ear, Nose, Mouth and Throat Diagnoses with MCC
155	Other Ear, Nose, Mouth and Throat Diagnoses with CC
156	Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
456	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
457	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
458	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
485	Knee Procedures with Principal Diagnosis of Infection with MCC
486	Knee Procedures with Principal Diagnosis of Infection with CC
487	Knee Procedures with Principal Diagnosis of Infection without CC/MCC
539	Osteomyelitis with MCC
540	Osteomyelitis with CC
541	Osteomyelitis without CC/MCC
548	Septic Arthritis with MCC
549	Septic Arthritis with CC
550	Septic Arthritis without CC/MCC

Showing 1–20 of 43

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset high fever, severe headache, neck stiffness, and altered mental status after several weeks of progressive constitutional symptoms. Cerebrospinal fluid analysis and PCR confirm tuberculous meningitis, prompting hospital admission for anti-tuberculosis therapy and close neurologic monitoring; a code for tuberculous meningitis is assigned. Typical codes: A18.01, A18.02
A middle-aged patient with a history of pulmonary tuberculosis now reports chronic dysphagia, progressive weight loss, and hoarseness; upper endoscopy and biopsy reveal tuberculous involvement of the esophagus and larynx. This represents extrapulmonary, chronic organ-specific tuberculosis requiring antimicrobial therapy and possible surgical consultation, so an esophageal or laryngeal TB code is used. Typical codes: A18.10, A18.11
An immunocompromised elderly patient is hospitalized for progressive swelling and fluctuance of the cervical lymph nodes with draining sinuses; aspiration and culture grow Mycobacterium tuberculosis, indicating tuberculous lymphadenitis as a complication contributing to the current admission. A lymph node TB code is assigned to capture this extrapulmonary infectious complication. Typical codes: A18.31, A18.32

Related Codes

A15-RESPIRATORY-TUBERCULOSIS

ICD-10-CM Code For Respiratory Tuberculosis: Group Overview

A17-TUBERCULOSIS-OF-NERVOUS-SYSTEM

ICD-10-CM Code For Tuberculosis Of Nervous System: Group Overview

A19-MILIARY-TUBERCULOSIS

ICD-10-CM Code For Miliary Tuberculosis: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

32 rows

ICD-10-CM Code	Description
A18.01	Tuberculosis of spine
A18.02	Tuberculous arthritis of other joints
A18.03	Tuberculosis of other bones
A18.09	Other musculoskeletal tuberculosis
A18.10	Tuberculosis of genitourinary system, unspecified
A18.11	Tuberculosis of kidney and ureter
A18.12	Tuberculosis of bladder
A18.13	Tuberculosis of other urinary organs
A18.14	Tuberculosis of prostate
A18.15	Tuberculosis of other male genital organs
A18.16	Tuberculosis of cervix
A18.17	Tuberculous female pelvic inflammatory disease
A18.18	Tuberculosis of other female genital organs
A18.2	Tuberculous peripheral lymphadenopathy
A18.31	Tuberculous peritonitis
A18.32	Tuberculous enteritis
A18.39	Retroperitoneal tuberculosis
A18.4	Tuberculosis of skin and subcutaneous tissue
A18.50	Tuberculosis of eye, unspecified
A18.51	Tuberculous episcleritis

Showing 1–20 of 32

DRG Codes

43 rows

DRG Code	Description
124	Other Disorders of the Eye with MCC or Thrombolytic Agent
125	Other Disorders of the Eye without MCC
154	Other Ear, Nose, Mouth and Throat Diagnoses with MCC
155	Other Ear, Nose, Mouth and Throat Diagnoses with CC
156	Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC
371	Major Gastrointestinal Disorders and Peritoneal Infections with MCC
372	Major Gastrointestinal Disorders and Peritoneal Infections with CC
373	Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
456	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
457	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
458	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
485	Knee Procedures with Principal Diagnosis of Infection with MCC
486	Knee Procedures with Principal Diagnosis of Infection with CC
487	Knee Procedures with Principal Diagnosis of Infection without CC/MCC
539	Osteomyelitis with MCC
540	Osteomyelitis with CC
541	Osteomyelitis without CC/MCC
548	Septic Arthritis with MCC
549	Septic Arthritis with CC
550	Septic Arthritis without CC/MCC

Showing 1–20 of 43

Typical Clinical Scenarios

An adult presents to the emergency department with acute onset high fever, severe headache, neck stiffness, and altered mental status after several weeks of progressive constitutional symptoms. Cerebrospinal fluid analysis and PCR confirm tuberculous meningitis, prompting hospital admission for anti-tuberculosis therapy and close neurologic monitoring; a code for tuberculous meningitis is assigned. Typical codes: A18.01, A18.02
A middle-aged patient with a history of pulmonary tuberculosis now reports chronic dysphagia, progressive weight loss, and hoarseness; upper endoscopy and biopsy reveal tuberculous involvement of the esophagus and larynx. This represents extrapulmonary, chronic organ-specific tuberculosis requiring antimicrobial therapy and possible surgical consultation, so an esophageal or laryngeal TB code is used. Typical codes: A18.10, A18.11
An immunocompromised elderly patient is hospitalized for progressive swelling and fluctuance of the cervical lymph nodes with draining sinuses; aspiration and culture grow Mycobacterium tuberculosis, indicating tuberculous lymphadenitis as a complication contributing to the current admission. A lymph node TB code is assigned to capture this extrapulmonary infectious complication. Typical codes: A18.31, A18.32

Related Codes

A15-RESPIRATORY-TUBERCULOSIS

ICD-10-CM Code For Respiratory Tuberculosis: Group Overview

A17-TUBERCULOSIS-OF-NERVOUS-SYSTEM

ICD-10-CM Code For Tuberculosis Of Nervous System: Group Overview

A19-MILIARY-TUBERCULOSIS

ICD-10-CM Code For Miliary Tuberculosis: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Tuberculosis Of Other Organs: Group Overview

Sign up for ICD-10-CM Code For Tuberculosis Of Other Organs: Group Overview policy alerts

ICD-10-CM A18: Tuberculosis Of Other Organs Overview

ICD-10-CM Code For Tuberculosis Of Other Organs: Group Overview

Sign up for ICD-10-CM Code For Tuberculosis Of Other Organs: Group Overview policy alerts

ICD-10-CM A18: Tuberculosis Of Other Organs Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes identify extrapulmonary tuberculosis sites in the A18 group?

How does accurate coding within ICD-10-CM A18 support reimbursement and claims?

Which DRGs commonly relate to tuberculosis of the spine or musculoskeletal sites in A18?

What A18 codes correspond to genitourinary and female reproductive tuberculosis?

Which A18 codes cover ocular, endocrine, and other less common extrapulmonary sites?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes identify extrapulmonary tuberculosis sites in the A18 group?

How does accurate coding within ICD-10-CM A18 support reimbursement and claims?

Which DRGs commonly relate to tuberculosis of the spine or musculoskeletal sites in A18?

What A18 codes correspond to genitourinary and female reproductive tuberculosis?

Which A18 codes cover ocular, endocrine, and other less common extrapulmonary sites?

References