2027 ICD-10-CM Diagnosis Code H18.463Peripheral corneal degeneration, bilateral
ICD-10-CM Codes›H00–H59›H15-H22›H18
- Billable — Valid for Submission
- Not Chronic
H18.463 is a billable ICD-10-CM diagnosis code for peripheral corneal degeneration, bilateral. 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. 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 dellen
- Bilateral corneal ectasia of eyes
- Bilateral degeneration of peripheral cornea of bilateral eyes
- Bilateral pellucid marginal degeneration of cornea of eye
- Bilateral Terrien's marginal degeneration of peripheral corneas
- Corneal dellen
- Corneal ectasia of left eye
- Corneal ectasia of right eye
- Corneal thinning
- Degeneration of peripheral cornea of left eye
- Degeneration of peripheral cornea of right eye
- Dellen of cornea of left eye
- Dellen of cornea of right eye
- Pellucid marginal corneal degeneration
- Pellucid marginal degeneration of cornea of left eye
- Pellucid marginal degeneration of cornea of right eye
- Terrien's marginal degeneration of cornea
- Terrien's marginal degeneration of peripheral cornea of left eye
- Terrien's marginal degeneration of peripheral cornea of right eye
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H18.463: its own notes plus those printed at H18.4 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 H18.463 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H18.463Overview
What is the ICD-10 code for peripheral corneal degeneration, bilateral?
The ICD-10-CM code for peripheral corneal degeneration, bilateral is H18.463 (sometimes written as H18463). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H18.463 (Peripheral corneal degeneration) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report peripheral corneal degeneration, bilateral on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H18.463 group to?
When peripheral corneal degeneration, bilateral 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.
Can H18.463 be reported with a code from H16.0?
Not as a rule. The Excludes1 note at H18.4, which applies to H18.463, lists "Mooren's ulcer (H16.0-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of H18.463?
Under the General Equivalence Mappings, peripheral corneal degeneration, bilateral converts to ICD-9-CM 371.48 (peripheral cornea degen). The mapping is approximate, so confirm the match fits the documentation.
