ICD-10 G90.529
Billable / Specific CCComplex regional pain syndrome I of unspecified lower limb
About ICD-10-CM G90.529
ICD-10-CM code G90.529 represents Complex regional pain syndrome I of unspecified lower limb. This is a billable/specific code in the Nervous System chapter (block G90). The 2026 edition of ICD-10-CM G90.529 became effective on October 1, 2025.
Coding Tips for G90.529
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G90.529 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Inpatient DRG Impact, CC
codes Complex regional pain syndrome I of unspecified lower limb. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for G90.529
Local Coverage Determinations (LCDs) from CMS MACs that list G90.529 as a covered diagnosis.
Showing top 10 of 61 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G90.529.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with G90.529
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 G90.529 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 |
|---|---|---|
| G90.529 | 33722 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G90.529
Other codes in section G89-G99 (Other disorders of the nervous system).
ICD-10 G90.529, Billing FAQ
Is ICD-10 code G90.529 billable? +
Yes, G90.529 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is G90.529 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does G90.529 map to? +
Per CMS GEMs, G90.529 maps to ICD-9 codes: 33722. 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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