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ICD-10-CM 2027 diagnosis code

R41.85Anosognosia

✓ Billable / specific

R41.85 is a valid, billable ICD-10-CM code for anosognosia. 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 Anosognosia.

Code last changed in FY2025 (effective October 1, 2024). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R41.85

R41.85 is the ICD-10-CM diagnosis code for Anosognosia. 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 (other symptoms and signs involving cognitive functions and awareness), R41.85 is specifically for Anosognosia. Related codes cover age-related cognitive decline (R41.81), Altered mental status, unspecified (R41.82), borderline intellectual functioning (R41.83), other specified cognitive deficit (R41.84) and other symptoms and signs involving cognitive functions and awareness (R41.89).

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 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 was added in FY2025, effective October 1, 2024.

Notes that apply from higher levels

Instructions written at a parent level also apply to R41.85.

› From R41 Other symptoms and signs involving cognitive functions and awareness
Excludes1
  • dissociative [conversion] disorders (F44.-)
  • mild cognitive impairment of uncertain or unknown etiology (G31.84)

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 R41.85.

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.

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
  • FY2025 (effective 10/1/2024): Added
  • No changes since FY2025.

Common questions about R41.85

Is R41.85 billable?

Yes. R41.85 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R41.85 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R41.85 as a principal diagnosis.

Is R41.85 a CC or MCC?

No. R41.85 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R41.85 group to?

R41.85 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.