ICD-10 B58.01
Billable / Specific CCToxoplasma chorioretinitis
About ICD-10-CM B58.01
ICD-10-CM code B58.01 represents Toxoplasma chorioretinitis. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block B58). The 2026 edition of ICD-10-CM B58.01 became effective on October 1, 2025.
Coding Tips for B58.01
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
B58.01 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.
Inpatient DRG Impact, CC
codes Toxoplasma chorioretinitis. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for B58.01
Local Coverage Determinations (LCDs) from CMS MACs that list B58.01 as a covered diagnosis.
Showing top 10 of 23 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B58.01.
5 Medicare
2 Aetna
CPT Codes Commonly Billed with B58.01
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 92235 CMS LCD: Billing and Coding: Ophthalmic Angiography (Fluorescein and Indocyanine Green) CMS LCD
- 92240 CMS LCD: Billing and Coding: Ophthalmic Angiography (Fluorescein and Indocyanine Green) CMS LCD
- 92242 CMS LCD: Billing and Coding: Ophthalmic Angiography (Fluorescein and Indocyanine Green) CMS LCD
- 92228 CMS LCD: Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography) CMS LCD
- 92201 CMS LCD: Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography) CMS LCD
- 92202 CMS LCD: Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography) CMS LCD
- 92250 CMS LCD: Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography) CMS LCD
- 92227 CMS LCD: Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography) CMS LCD
Convert B58.01 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 |
|---|---|---|
| B58.01 | 1302 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To B58.01
Other codes in section B50-B64 (Protozoal diseases).
ICD-10 B58.01, Billing FAQ
Is ICD-10 code B58.01 billable? +
Yes, B58.01 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is B58.01 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 CPT codes are commonly billed with B58.01? +
Procedures frequently paired with B58.01 include: 92235, 92240, 92242, 92228, 92201.
What ICD-9 codes does B58.01 map to? +
Per CMS GEMs, B58.01 maps to ICD-9 codes: 1302. 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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