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ICD-10-CM 2027 diagnosis code

A18.01Tuberculosis of spine

✓ Billable / specificCC — complication/comorbidity

A18.01 is a valid, billable ICD-10-CM code for tuberculosis of spine. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Rust's disease.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A18.01

A18.01 is the ICD-10-CM diagnosis code for tuberculosis of spine. It belongs to category A18 (tuberculosis of other organs), block A15-A19 (tuberculosis) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A18.0 (tuberculosis of bones and joints), A18.01 is specifically for tuberculosis of spine. Related codes cover tuberculous arthritis of other joints (A18.02), tuberculosis of other bones (A18.03) and other musculoskeletal tuberculosis (A18.09).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC, relative weight 7.6244), DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC, relative weight 5.3668), DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC, relative weight 4.0388), DRG 539 (Osteomyelitis with MCC, relative weight 1.9385), DRG 540 (Osteomyelitis with CC, relative weight 1.3079), DRG 541 (Osteomyelitis without CC/MCC, relative weight 0.8297) and 3 more, in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 015.00 (tuberculosis of vertebral column, unspecified), 015.00 (tuberculosis of vertebral column, unspecified), 015.00 (tuberculosis of vertebral column, unspecified) and 8 more.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Pott's disease or curvature of spine
  • Tuberculous arthritis
  • Tuberculous osteomyelitis of spine
  • Tuberculous spondylitis

Notes that apply from higher levels

Instructions written at a parent level also apply to A18.01.

Broader instructions also apply from A15-A19 Tuberculosis and Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

40 entries

Terms in the official ICD-10-CM index that lead to A18.01.

Codes whose notes reference A18.01

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue

ICD-9-CM equivalent

Converter →
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate, combination
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate, combination
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate, combination
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate, combination
  • 015.00Tuberculosis of vertebral column, unspecifiedapproximate, combination
  • 711.48Arthropathy associated with other bacterial diseases, other specified sitesapproximate, combination
  • 720.81Inflammatory spondylopathies in diseases classified elsewhereapproximate, combination
  • 730.88Other infections involving bone in diseases classified elsewhere, other specified sitesapproximate, combination
  • 737.40Curvature of spine, unspecified, associated with other conditionsapproximate, combination
  • 737.42Lordosis associated with other conditionsapproximate, combination

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about A18.01

Is A18.01 billable?

Yes. A18.01 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A18.01 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A18.01 as a principal diagnosis.

Is A18.01 a CC or MCC?

A18.01 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does A18.01 group to?

A18.01 is used in the MS-DRG v44.0 logic for MS-DRG 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC), MS-DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC), MS-DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC), MS-DRG 539 (Osteomyelitis with MCC), MS-DRG 540 (Osteomyelitis with CC), MS-DRG 541 (Osteomyelitis without CC/MCC) and 3 more. Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for A18.01?

The CMS General Equivalence Mappings map A18.01 to ICD-9-CM 015.00, 015.00, 015.00, 015.00 and 7 more.