Is R45.851 a billable ICD-10-CM code?

Yes. R45.851 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R45.851 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46).

What cannot be coded together with R45.851?

R45.851 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 R45.851 (R45.85) and apply to it just the same.

R45.851

R45.851 — Suicidal ideations

Billable / specific codeICD-10-CM

R45.851 is a billable, specific ICD-10-CM code for suicidal ideations. It is valid for submission on a claim.

Excludes1 inherited from the categories above R45.851

These are not written on R45.851, but they bind it: a note on a category applies to every code beneath it. Billing R45.851 with anything listed here is a denial.

Written on R45.85 — Homicidal and suicidal ideations

suicide attempt (T14.91)

Other codes that can never be billed with R45.851

These codes carry an Excludes1 note pointing at R45.851. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R45.851 alone.

F07.0Personality change due to known physiological condition

Risk adjustment

R45.851 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.

Medicare coverage

R45.851 is named in 18 Medicare coverage policies — 18 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54799Billing and Coding: Urine Drug Testing
A56614Billing and Coding: Psychiatric Inpatient Hospitalization
A56850Billing and Coding: Psychiatric Partial Hospitalization Programs
A56865Billing and Coding: Psychiatric Inpatient Hospitalization

How R45.851 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 R45.851.

Ideation›suicidal

Code history

R45.851 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 R45.85. If R45.851 is not quite right, the correct code is usually one of these.

R45.850Homicidal ideations

Questions about R45.851

Is R45.851 a billable ICD-10-CM code?: Yes. R45.851 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R45.851 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46).
What cannot be coded together with R45.851?: R45.851 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 R45.851 (R45.85) and apply to it just the same.