H11.00Unspecified pterygium of eye

H11.00 is the ICD-10-CM diagnosis code for unspecified pterygium of eye. It belongs to category H11 (other disorders of conjunctiva), block H10-H11 (disorders of conjunctiva) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within H11.0, choose H11.00 (Unspecified pterygium of eye) only when documentation doesn't support a more specific option: amyloid pterygium (H11.01), central pterygium of eye (H11.02), Double pterygium of eye (H11.03), peripheral pterygium of eye, stationary (H11.04), peripheral pterygium of eye, progressive (H11.05) and recurrent pterygium of eye (H11.06).

To report this condition, pick the subcode that matches the documentation: H11.001 (eye), H11.002 (eye), H11.003 (bilateral) and H11.009 (eye).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.