2026 ICD-10-CM Diagnosis Code H16.423Pannus (corneal), bilateral
ICD-10-CM Codes›H00–H59›H15-H22›H16
- Billable — Valid for Submission
- Chronic Condition
H16.423 is a billable ICD-10-CM diagnosis code for pannus (corneal), bilateral. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as bilateral corneal pannus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral corneal pannus
- Bilateral neovascularization of corneas
- Corneal pannus
- Corneal pannus of left eye
- Corneal pannus of right eye
- Neovascularization of left cornea
- Neovascularization of right cornea
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Pannus
a genus of cyanobacteria in the family synechococcaceae that is free-floating and occurs in various water environments attaching to algae and submersed plants.Cyanobacteria
a phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing chlorophyll a and carrying out oxygenic photosynthesis. cyanobacteria are the only known organisms capable of fixing both carbon dioxide (in the presence of light) and nitrogen. cell morphology can include nitrogen-fixing heterocysts and/or resting cells called akinetes. formerly called blue-green algae, cyanobacteria were traditionally treated as algae.
Patient EducationClinical
Corneal Disorders
Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H16.423 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H16.423Overview
Is H16.423 (Pannus (corneal)) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pannus (corneal), bilateral on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does H16.423 group to?
When pannus (corneal), bilateral is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H16.423?
Under the General Equivalence Mappings, pannus (corneal), bilateral converts to ICD-9-CM 370.62 (corneal pannus). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
