ICD-10-CM 2027 diagnosis code
R41.89Other symptoms and signs involving cognitive functions and awareness
R41.89 is a valid, billable ICD-10-CM code for other symptoms and signs involving cognitive functions and awareness. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth symptoms and signs w cognitive functions and awareness
Looking up by condition? See ICD-10 code for Trance, ICD-10 code for Akinetic mutism.
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 R41.89
R41.89 is the ICD-10-CM diagnosis code for other symptoms and signs involving cognitive functions and awareness. It belongs to category R41 (other symptoms and signs involving cognitive functions and awareness), 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 R41.8, choose R41.89 (Other symptoms and signs involving cognitive functions and awareness) only when documentation doesn't support a more specific option: age-related cognitive decline (R41.81), Altered mental status, unspecified (R41.82), borderline intellectual functioning (R41.83), other specified cognitive deficit (R41.84) and Anosognosia (R41.85).
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 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), 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 799.59 (other signs and symptoms involving cognition).
Notes that apply from higher levels
Instructions written at a parent level also apply to R41.89.
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
7 entriesTerms in the official ICD-10-CM index that lead to R41.89.
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 →- 799.59Other signs and symptoms involving cognitionexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about R41.89
Is R41.89 billable?
- Yes. R41.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R41.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R41.89 as a principal diagnosis.
Is R41.89 a CC or MCC?
- No. R41.89 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does R41.89 group to?
- R41.89 is used in the MS-DRG v44.0 logic for MS-DRG 884 (Organic Disturbances and Intellectual Disability). 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 R41.89?
- The CMS General Equivalence Mappings map R41.89 to ICD-9-CM 799.59.