A18.81 – Tuberculosis of thyroid gland
ICD-10-CM 2027 diagnosis code · Tuberculosis
ICD-10-CM code
A18.81
- Code
A18.81(claims format:A1881)- Description
- Tuberculosis of thyroid gland
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A15-A19 Tuberculosis
- Parent codes
- A18 › A18.8
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block A15-A19
Includes:
- infections due to Mycobacterium tuberculosis and Mycobacterium bovis
Excludes1 (not coded here):
- congenital tuberculosis (P37.0)
- nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-)
- pneumoconiosis associated with tuberculosis, any type in A15 (J65)
- positive PPD (R76.11)
- positive tuberculin skin test without active tuberculosis (R76.11)
- sequelae of tuberculosis (B90.-)
- silicotuberculosis (J65)
Use additional code:
- code, if applicable, for associated cachexia (E88.A)
Index terms for A18.81
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in A18.8
Frequently asked questions
What is ICD-10 code A18.81?
A18.81 is the ICD-10-CM code for tuberculosis of thyroid gland, in the block A15-A19 (Tuberculosis).
Is A18.81 a billable code?
Yes. A18.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does A18.81 belong to?
It belongs to category A18 – Tuberculosis of other organs.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.