2027 ICD-10-CM Diagnosis Code H17.823Peripheral opacity of cornea, bilateral

ICD-10-CM Codes›H00–H59›H15-H22›H17

ICD-10-CM H17.823
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H17.823 is a billable ICD-10-CM diagnosis code for peripheral opacity of cornea, 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. Coders also document this condition as bilateral degeneration of peripheral cornea of bilateral eyes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.

Code Identity

ICD-10-CM Code
H17.823
Billable Status
Yes — Valid for Submission
Code Describes
Peripheral opacity of cornea, bilateral
Short Description
Peripheral opacity of cornea, bilateral
Same as the full description in the CMS dataset.
Parent Code
H17.82
Peripheral opacity of cornea

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH17Corneal scars and opacities
This CodeH17.823Peripheral opacity of cornea, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral degeneration of peripheral cornea of bilateral eyes
  • Degeneration of peripheral cornea of left eye
  • Degeneration of peripheral cornea of right eye
  • Opacity of cornea of bilateral eyes
  • Peripheral opacity of bilateral corneas
  • Peripheral opacity of cornea
  • Peripheral opacity of left cornea
  • Peripheral opacity of right cornea

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H17.823: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.

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.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • 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.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • 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.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name H17.823, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and H17.823 is one of the codes named.

  • L51 Erythema multiforme
    corneal scars and opacities (H17.-) names H17.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes

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 H17.823 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
371.02 Periph opacity of cornea
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H17.823Overview

What is the ICD-10 code for peripheral opacity of cornea, bilateral?

The ICD-10-CM code for peripheral opacity of cornea, bilateral is H17.823 (sometimes written as H17823). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H17.823 (Peripheral opacity of cornea) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report peripheral opacity of cornea, bilateral on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H17.823 group to?

When peripheral opacity of cornea, 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.

What is the ICD-9 equivalent of H17.823?

Under the General Equivalence Mappings, peripheral opacity of cornea, bilateral converts to ICD-9-CM 371.02 (periph opacity of cornea). The mapping is approximate, so confirm the match fits the documentation.