2027 ICD-10-CM Diagnosis Code H18.721Corneal staphyloma, right eye
ICD-10-CM Codes›H00–H59›H15-H22›H18
- Billable — Valid for Submission
- Not Chronic
H18.721 is a billable ICD-10-CM diagnosis code for corneal staphyloma, right eye. 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. Coders also document this condition as corneal ectasia of right eye. 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.
- Corneal ectasia of right eye
- Corneal staphyloma
- Corneal staphyloma of right eye
- Uveal prolapse
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H18.721: its own notes plus those printed at H18.7 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.
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.
- 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)
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 H18.721 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H18.721Overview
What is the ICD-10 code for corneal staphyloma, right eye?
The ICD-10-CM code for corneal staphyloma, right eye is H18.721 (sometimes written as H18721). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H18.721 (Corneal staphyloma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report corneal staphyloma, right eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H18.721 group to?
When corneal staphyloma, right eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H18.721?
Under the General Equivalence Mappings, corneal staphyloma, right eye converts to ICD-9-CM 371.73 (corneal staphyloma). The mapping is approximate, so confirm the match fits the documentation.
