ICD-10 R79.1
Billable / SpecificAbnormal coagulation profile
About ICD-10-CM R79.1
ICD-10-CM code R79.1 represents Abnormal coagulation profile. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R79). The 2026 edition of ICD-10-CM R79.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under R79.1. Per CMS ICD-10-CM Tabular 2026.
- Abnormal or prolonged bleeding time
- Abnormal or prolonged coagulation time
- Abnormal or prolonged partial thromboplastin time [PTT]
- Abnormal or prolonged prothrombin time [PT]
- Low von Willebrand factor
Type 1 Excludes
Pure excludes, these codes can never be coded together with R79.1. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- coagulation defects (D68.-)
Type 2 Excludes
Not included here, the excluded code is not part of R79.1, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- abnormality of fluid, electrolyte or acid-base balance (E86-E87)
Medicare LCD Coverage for R79.1
Local Coverage Determinations (LCDs) from CMS MACs that list R79.1 as a covered diagnosis.
Showing top 10 of 35 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R79.1.
2 Medicare
CPT Codes Commonly Billed with R79.1
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 R79.1 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 |
|---|---|---|
| R79.1 | 79092 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R79.1
Other codes in section R70-R79 (Abnormal findings on examination of blood, without diagnosis).
ICD-10 R79.1, Billing FAQ
Is ICD-10 code R79.1 billable? +
Yes, R79.1 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 R79.1? +
ICD-10 R79.1 includes: Abnormal or prolonged bleeding time; Abnormal or prolonged coagulation time; Abnormal or prolonged partial thromboplastin time [PTT], and 2 more clinical synonyms.
What codes are Type 1 Excludes for R79.1? +
Type 1 Excludes (never code together with R79.1): coagulation defects (D68.-)
What codes are Type 2 Excludes for R79.1? +
Type 2 Excludes (may be coded together when both conditions exist): abnormality of fluid, electrolyte or acid-base balance (E86-E87)
What ICD-9 codes does R79.1 map to? +
Per CMS GEMs, R79.1 maps to ICD-9 codes: 79092. 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 June 1, 2026.
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