ICD-10 R41.82
Billable / SpecificAltered mental status, unspecified
About ICD-10-CM R41.82
ICD-10-CM code R41.82 represents Altered mental status, unspecified. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R41). The 2026 edition of ICD-10-CM R41.82 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under R41.82. Per CMS ICD-10-CM Tabular 2026.
- Change in mental status NOS
Type 1 Excludes
Pure excludes, these codes can never be coded together with R41.82. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- altered level of consciousness (R40.-)
- altered mental status due to known condition - code to condition
- delirium NOS (R41.0)
Medicare LCD Coverage for R41.82
Local Coverage Determinations (LCDs) from CMS MACs that list R41.82 as a covered diagnosis.
Showing top 10 of 874 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R41.82.
2 Cigna
5 Medicare
CPT Codes Commonly Billed with R41.82
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert R41.82 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| R41.82 | 78097 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R41.82
Other codes in section R40-R46 (Symptoms and signs involving cognition, perception, emotional state and behavior).
ICD-10 R41.82, Billing FAQ
Is ICD-10 code R41.82 billable? +
Yes, R41.82 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to R41.82? +
ICD-10 R41.82 includes: Change in mental status NOS.
What codes are Type 1 Excludes for R41.82? +
Type 1 Excludes (never code together with R41.82): altered level of consciousness (R40.-); altered mental status due to known condition - code to condition; delirium NOS (R41.0)
What ICD-9 codes does R41.82 map to? +
Per CMS GEMs, R41.82 maps to ICD-9 codes: 78097. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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