ICD-10 Code for Plague
The ICD-10-CM code for plague is A20.9 — Plague, unspecified. This is the code the Alphabetic Index gives for plague with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A20.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which plague code should you use?
The Alphabetic Index lists 7 codes under Plague. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| abortive | A20.8 | Other forms of plague | |
| ambulatory | A20.8 | Other forms of plague | |
| asymptomatic | A20.8 | Other forms of plague | |
| bubonic | A20.0 | Bubonic plague | |
| cellulocutaneous | A20.1 | Cellulocutaneous plague | |
| cutaneobubonic | A20.1 | Cellulocutaneous plague | |
| lymphatic gland | A20.0 | Bubonic plague | |
| meningitis | A20.3 | Plague meningitis | |
| pharyngeal | A20.8 | Other forms of plague | |
| pneumonic | A20.2 | Pneumonic plague | |
| pulmonary, pulmonic | A20.2 | Pneumonic plague | |
| septicemic | A20.7 | Septicemic plague | |
| tonsillar | A20.8 | Other forms of plague |
Plague tonsillar
| septicemic | A20.7 | Septicemic plague |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources