2027 ICD-10-CM Diagnosis Code B73.09Onchocerciasis with other eye involvement
ICD-10-CM Codes›A00–B99›B65-B83›B73
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B73.09 is a billable ICD-10-CM diagnosis code for onchocerciasis with other eye involvement. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869. 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 13 closely related codes. Coders also document this condition as ocular onchocerciasis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders; and Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Ocular onchocerciasis
- Onchocerca chorioretinitis
- Parasitic chorioretinitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B73.09: its own notes plus those printed at B73 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.
- onchocerca volvulus infection
- onchocercosis
- river blindness
- diseases generally recognized as communicable or transmissible
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Infestation of eyelid due to onchocerciasis
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 B73.09, its category, or a range that includes it.
Excludes2 1
These codes carry an Excludes2 note naming B73.09: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 1
These codes say to code first a condition named in the note, and B73.09 is one of the conditions named.
- K67 Disorders of peritoneum in infectious diseases classified elsewhere
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
onchocerciasis B73.09
eyelid B73.09
microfilaria streptocerca See: Onchocerciasis;
eyelid B73.09
Onchocerciasis, onchocercosis B73.1
eyelid B73.09
specified NEC B73.09
eyelid B73.09
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Onchocerciasis
infection with nematodes of the genus onchocerca. characteristics include the presence of firm subcutaneous nodules filled with adult worms, pruritus, and ocular lesions.
Patient EducationClinical
Parasitic Diseases
Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B73.09 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B73.09Overview
What is the ICD-10 code for onchocerciasis with other eye involvement?
The ICD-10-CM code for onchocerciasis with other eye involvement is B73.09 (sometimes written as B7309). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B73.09 (Onchocerciasis with eye disease) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report onchocerciasis with other eye involvement on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B73.09 group to?
When onchocerciasis with other eye involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 869, 868, with relative weights from 0.6784 to 2.1855 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B73.09 a CC or MCC?
CMS lists B73.09 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 13 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B73.09?
Under the General Equivalence Mappings, onchocerciasis with other eye involvement converts to ICD-9-CM 125.3 (onchocerciasis). The mapping is approximate, so confirm the match fits the documentation.
