Is A56.4 a billable ICD-10-CM code?

Yes. A56.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does A56.4 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).

A56.4

A56.4 — Chlamydial infection of pharynx

Billable / specific codeICD-10-CM

A56.4 is a billable, specific ICD-10-CM code for chlamydial infection of pharynx. It is valid for submission on a claim.

Risk adjustment

A56.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How A56.4 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A56.4.

Chlamydia, chlamydial›pharyngitis
Pharyngitis›chlamydial
Infection, infected, infective›Chlamydia, chlamydial›pharynx
Disease, diseased›venereal›chlamydial NEC›pharynx

Related codes at this level

Codes that share A56. If A56.4 is not quite right, the correct code is usually one of these.

Questions about A56.4

Is A56.4 a billable ICD-10-CM code?: Yes. A56.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does A56.4 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).