ICD-10 R06.5
Billable / SpecificMouth breathing
About ICD-10-CM R06.5
ICD-10-CM code R06.5 represents Mouth breathing. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R06). The 2026 edition of ICD-10-CM R06.5 became effective on October 1, 2025.
Type 2 Excludes
Not included here, the excluded code is not part of R06.5, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- dry mouth NOS (R68.2)
Medicare LCD Coverage for R06.5
Local Coverage Determinations (LCDs) from CMS MACs that list R06.5 as a covered diagnosis.
Showing top 10 of 21 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R06.5.
1 Medicare
CPT Codes Commonly Billed with R06.5
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Convert R06.5 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 |
|---|---|---|
| R06.5 | 78499 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R06.5
Other codes in section R00-R09 (Symptoms and signs involving the circulatory and respiratory systems).
ICD-10 R06.5, Billing FAQ
Is ICD-10 code R06.5 billable? +
Yes, R06.5 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 2 Excludes for R06.5? +
Type 2 Excludes (may be coded together when both conditions exist): dry mouth NOS (R68.2)
What CPT codes are commonly billed with R06.5? +
Procedures frequently paired with R06.5 include: 42820, 30520.
What ICD-9 codes does R06.5 map to? +
Per CMS GEMs, R06.5 maps to ICD-9 codes: 78499. 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 July 16, 2026.
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