2027 ICD-10-CM Diagnosis Code H35.173Retrolental fibroplasia, bilateral

ICD-10-CM Codes›H00–H59›H30-H36›H35

ICD-10-CM H35.173
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H35.173 is a billable ICD-10-CM diagnosis code for retrolental fibroplasia, 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 Retinal and vitreous conditions.

Code Identity

ICD-10-CM Code
H35.173
Billable Status
Yes — Valid for Submission
Code Describes
Retrolental fibroplasia, bilateral
Short Description
Retrolental fibroplasia, bilateral
Same as the full description in the CMS dataset.
Parent Code
H35.17
Retrolental fibroplasia

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH35Other retinal disorders
This CodeH35.173Retrolental fibroplasia, bilateral

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H35.173: its own notes plus those printed at H35 and 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 H35 Other retinal disorders applies to 175 codes
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.

Clinical ClassificationClinical

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

CCSR EYE005
Retinal and vitreous conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Retinopathy of Prematurity

    a bilateral retinopathy occurring in premature infants treated with excessively high concentrations of oxygen, characterized by vascular dilatation, proliferation, and tortuosity, edema, and retinal detachment, with ultimate conversion of the retina into a fibrous mass that can be seen as a dense retrolental membrane. usually growth of the eye is arrested and may result in microophthalmia, and blindness may occur. (dorland, 27th ed)

Patient EducationClinical

Retinal Disorders

Retinal disorders are conditions that affect the retina, the thin light-sensitive tissue at the back of your eye. The retina senses light and sends signals to your brain so you can see.

The full article covers:

  • What are retinal disorders?
  • What causes retinal disorders?
  • What are common retinal disorders?
  • What are the symptoms of retinal disorders?
  • How are retinal disorders diagnosed?
  • How are retinal disorders treated?
  • Can retinal disorders be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H35.173 to ICD-9-CMHistory

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

ICD-9-CM
362.21 Retrolental fibroplasia
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 H35.173Overview

What is the ICD-10 code for retrolental fibroplasia, bilateral?

The ICD-10-CM code for retrolental fibroplasia, bilateral is H35.173 (sometimes written as H35173). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H35.173 (Retrolental fibroplasia) a billable code?

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

What MS-DRG does H35.173 group to?

When retrolental fibroplasia, 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 H35.173?

Under the General Equivalence Mappings, retrolental fibroplasia, bilateral converts to ICD-9-CM 362.21 (retrolental fibroplasia). The mapping is approximate, so confirm the match fits the documentation.