ICD-10 R83.3
Billable / SpecificAbnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid
About ICD-10-CM R83.3
ICD-10-CM code R83.3 represents Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R83). The 2026 edition of ICD-10-CM R83.3 became effective on October 1, 2025.
Medicare LCD Coverage for R83.3
Local Coverage Determinations (LCDs) from CMS MACs that list R83.3 as a covered diagnosis.
Showing top 10 of 28 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R83.3.
1 Medicare
CPT Codes Commonly Billed with R83.3
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 R83.3 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 |
|---|---|---|
| R83.3 | 7920 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R83.3
Other codes in section R83-R89 (Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis).
ICD-10 R83.3, Billing FAQ
Is ICD-10 code R83.3 billable? +
Yes, R83.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does R83.3 map to? +
Per CMS GEMs, R83.3 maps to ICD-9 codes: 7920. 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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