Diseases of the eye and adnexa (H00–H59) ICD-10-CM
Chapter 7 of the ICD-10-CM classification spans codes H00–H59 and contains 3,466 diagnosis codes for diseases of the eye and adnexa, of which 2,677 are billable. The chapter is organized into 12 sections listed below, each linking to its code ranges and individual codes.
Chapter Coding Notes
Note: Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Excludes2: certain conditions originating in the perinatal period (P04-P96), certain infectious and parasitic diseases (A00-B99), complications of pregnancy, childbirth and the puerperium (O00-O9A), congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99), diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-), endocrine, nutritional and metabolic diseases (E00-E88), injury (trauma) of eye and orbit (S05.-), injury, poisoning and certain other consequences of external causes (S00-T88), neoplasms (C00-D49), symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
Sections in This Chapter 12 ranges · 3,466 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About Chapter 7
Chapter 7 in the ICD-10-CM system covers diseases of the eye and adnexa, encompassing a range of conditions affecting the eye itself and its surrounding structures, such as eyelids and tear ducts. Codes in the range H00–H59 are used to classify these disorders.
This chapter includes codes for common eye conditions like conjunctivitis, keratitis, and glaucoma, as well as disorders of the lens and retina. It also covers inflammatory, infectious, and structural problems affecting the eye's external parts. By accurately coding conditions in this range, medical coders and healthcare professionals can document and manage diseases that impact vision and eye health effectively. Understanding this chapter is essential for those involved in ophthalmology, optometry, and related specialties, as it organizes a broad spectrum of eye-related diagnoses to improve patient care and treatment tracking.
Questions About This Page
How many codes are in the H00-H59 range?
The H00-H59 range contains 3,466 ICD-10-CM diagnosis codes in FY 2026. 2,677 of them are billable, and the rest are category headers that organize the chapter.
What conditions does H00-H59 cover?
The range covers diseases of the eye and adnexa. The sections listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
