Is Z13.858 a billable ICD-10-CM code?

Yes. Z13.858 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Z13.858 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons encountering health services for examinations (Z00-Z13).

What cannot be coded together with Z13.858?

Z13.858 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z13.858 (Z13) and apply to it just the same.

Z13.858

Z13.858 — Encounter for screening for other nervous system disorders

Billable / specific codeICD-10-CMPOA exempt

Z13.858 is a billable, specific ICD-10-CM code for encounter for screening for other nervous system disorders. It is valid for submission on a claim.

Excludes1 inherited from the categories above Z13.858

These are not written on Z13.858, but they bind it: a note on a category applies to every code beneath it. Billing Z13.858 with anything listed here is a denial.

Written on Z13 — Encounter for screening for other diseases and disorders

encounter for diagnostic examination-code to sign or symptom

Excludes2 inherited from the categories above Z13.858

Also inherited, and the opposite of Excludes1: these conditions are not part of Z13.858, but a patient can have both, so you may code both.

Written on Z13.8 — Encounter for screening for other specified diseases and disorders

screening for malignant neoplasms (Z12.-)

Risk adjustment

Z13.858 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 Z13.858 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 Z13.858.

Screening›nervous system disorders NEC

Code history

Z13.858 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Z13.85. If Z13.858 is not quite right, the correct code is usually one of these.

Z13.850Encounter for screening for traumatic brain injury

Questions about Z13.858

Is Z13.858 a billable ICD-10-CM code?: Yes. Z13.858 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Z13.858 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons encountering health services for examinations (Z00-Z13).
What cannot be coded together with Z13.858?: Z13.858 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z13.858 (Z13) and apply to it just the same.