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ICD-10-CM 2027 diagnosis code

R45.851Suicidal ideations

✓ Billable / specificCC — complication/comorbidity

R45.851 is a valid, billable ICD-10-CM code for suicidal ideations. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R45.851

R45.851 is the ICD-10-CM diagnosis code for suicidal ideations. It belongs to category R45 (symptoms and signs involving emotional state), block R40-R46 (symptoms and signs involving cognition, perception, emotional state and behavior) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R45.85 (Homicidal and suicidal ideations), R45.851 is specifically for suicidal ideations. Related codes cover Homicidal ideations (R45.850).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as V62.84 (suicidal ideation).

Notes that apply from higher levels

Instructions written at a parent level also apply to R45.851.

› From R45.85 Homicidal and suicidal ideations
Excludes1

Broader instructions also apply from R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to R45.851.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R45.851

Is R45.851 billable?

Yes. R45.851 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R45.851 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R45.851 as a principal diagnosis.

Is R45.851 a CC or MCC?

R45.851 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does R45.851 group to?

R45.851 is used in the MS-DRG v44.0 logic for MS-DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R45.851?

The CMS General Equivalence Mappings map R45.851 to ICD-9-CM V62.84.