R41.82 – Altered mental status, unspecified

ICD-10-CM 2027 diagnosis code · Symptoms and signs involving cognition, perception, emotional state and behavior

Billable code

ICD-10-CM code R41.82

Code: R41.82 (claims format: R4182)
Description: Altered mental status, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior
Parent codes: R41 › R41.8

Notes for R41.82

Applicable to:

Change in mental status NOS

Excludes1 (not coded here):

altered level of consciousness (R40.-)
altered mental status due to known condition - code to condition
delirium NOS (R41.0)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R41 – Other symptoms and signs involving cognitive functions and awareness

Excludes1 (not coded here):

dissociative [conversion] disorders (F44.-)
mild cognitive impairment of uncertain or unknown etiology (G31.84)

Block R40-R46

Excludes2 (not included here):

symptoms and signs constituting part of a pattern of mental disorder (F01-F99)

Index terms for R41.82

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in R41.8

R41.81 – Age-related cognitive declineBillable
R41.83 – Borderline intellectual functioningBillable
R41.84 – Other specified cognitive deficitHeader
R41.85 – AnosognosiaBillable
R41.89 – Other symptoms and signs involving cognitive functions and awarenessBillable

Frequently asked questions

What is ICD-10 code R41.82?

R41.82 is the ICD-10-CM code for altered mental status, unspecified, in the block R40-R46 (Symptoms and signs involving cognition, perception, emotional state and behavior).

Is R41.82 a billable code?

Yes. R41.82 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R41.82 belong to?

It belongs to category R41 – Other symptoms and signs involving cognitive functions and awareness.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.