2027 ICD-10-CM Diagnosis Code B58.01Toxoplasma chorioretinitis
ICD-10-CM Codes›A00–B99›B50-B64›B58
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B58.01 is a billable ICD-10-CM diagnosis code for toxoplasma chorioretinitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125, 791, 793, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections; and Retinal and vitreous conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired disseminated toxoplasmosis
- Acute toxoplasmosis chorioretinitis
- Bilateral retinitis of eyes caused by Toxoplasma gondii
- Bilateral Toxoplasma choroiditis
- Chorioretinitis of bilateral eyes caused by Toxoplasma gondii
- Chorioretinitis of left eye caused by Toxoplasma gondii
- Chorioretinitis of right eye caused by Toxoplasma gondii
- Choroiditis of left eye caused by Toxoplasma gondii
- Choroiditis of right eye caused by Toxoplasma gondii
- Focal chorioretinitis due to acquired disseminated toxoplasmosis
- Inactive toxoplasmosis chorioretinitis
- Infection causing inflammation of optic nerve
- Multisystemic disseminated toxoplasmosis
- Parasitic chorioretinitis
- Parasitic infection of cranial nerve
- Posterior uveitis due to infectious disease
- Punctate outer retinal toxoplasmosis
- Reactivation of toxoplasmosis chorioretinitis
- Retinitis of left eye caused by Toxoplasma
- Retinitis of right eye caused by Toxoplasma
- Toxoplasma choroiditis
- Toxoplasma neuroretinitis
- Toxoplasma retinitis
- Toxoplasmosis chorioretinitis
- Uveitis of bilateral eyes caused by Toxoplasma gondii
- Uveitis of left eye caused by Toxoplasma gondii
- Uveitis of right eye caused by Toxoplasma gondii
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B58.01: its own notes plus those printed at B58, block B50-B64, and Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- infection due to Toxoplasma gondii
- diseases generally recognized as communicable or transmissible
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B58.01, its category, or a range that includes it.
Applicable To 1
These notes mention B58.01.
- O98.6 Protozoal diseases complicating pregnancy, childbirth and the puerperium
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Chorioretinitis See Also: Inflammation, chorioretinal;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Toxoplasmosis
the acquired form of infection by toxoplasma gondii in animals and man.
Patient EducationClinical
Eye Infections
Your eyes can get infections from bacteria, fungi, or viruses. Eye infections can occur in different parts of the eye and can affect just one eye or both. Two common eye infections are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B58.01 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B58.01Overview
What is the ICD-10 code for toxoplasma chorioretinitis?
The ICD-10-CM code for toxoplasma chorioretinitis is B58.01 (sometimes written as B5801). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B58.01 (Toxoplasma oculopathy) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report toxoplasma chorioretinitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B58.01 group to?
When toxoplasma chorioretinitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 974, 125, 976, 975, 124, with relative weights from 0.7699 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B58.01 a CC or MCC?
CMS lists B58.01 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.
Can B58.01 be reported with P37.1?
Not as a rule. The Excludes1 note at B58, which applies to B58.01, lists "congenital toxoplasmosis (P37.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
