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ICD-10-CM 2027 diagnosis code

R45.86Emotional lability

✓ Billable / specific

R45.86 is a valid, billable ICD-10-CM code for emotional lability. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Emotional lability.

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 R45.86

R45.86 is the ICD-10-CM diagnosis code for emotional lability. 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 R45.8 (other symptoms and signs involving emotional state), R45.86 is specifically for emotional lability. Related codes cover low self-esteem (R45.81), Worries (R45.82), excessive crying of child, adolescent or adult (R45.83), Anhedonia (R45.84), Homicidal and suicidal ideations (R45.85), Impulsiveness (R45.87), nonsuicidal self-harm (R45.88) and other symptoms and signs involving emotional state (R45.89).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 883 (Disorders of Personality and Impulse Control, relative weight 1.7697), 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 799.24 (emotional lability).

Notes that apply from higher levels

Instructions written at a parent level also apply to R45.86.

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

2 entries

Terms in the official ICD-10-CM index that lead to R45.86.

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.

MDC 19 · Mental Diseases and Disorders

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 R45.86

Is R45.86 billable?

Yes. R45.86 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R45.86 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R45.86 as a principal diagnosis.

Is R45.86 a CC or MCC?

No. R45.86 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R45.86 group to?

R45.86 is used in the MS-DRG v44.0 logic for MS-DRG 883 (Disorders of Personality and Impulse Control). 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 R45.86?

The CMS General Equivalence Mappings map R45.86 to ICD-9-CM 799.24.