2027 ICD-10-CM Diagnosis Code H30.23Posterior cyclitis, bilateral

ICD-10-CM Codes›H00–H59›H30-H36›H30

ICD-10-CM H30.23
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H30.23 is a billable ICD-10-CM diagnosis code for posterior cyclitis, 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 posterior cyclitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Retinal and vitreous conditions and Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H30.23
Billable Status
Yes — Valid for Submission
Code Describes
Posterior cyclitis, bilateral
Short Description
Posterior cyclitis, bilateral
Same as the full description in the CMS dataset.
Parent Code
H30.2
Posterior cyclitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH30Chorioretinal inflammation
This CodeH30.23Posterior cyclitis, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral posterior cyclitis
  • Intermediate uveitis
  • Left posterior cyclitis
  • Posterior cyclitis
  • Right posterior cyclitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H30.23: 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 H30.23, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming H30.23: its condition is not part of those codes, and both may be reported when the patient has both.

  • H20.1 Chronic iridocyclitis
    posterior cyclitis (H30.2-) names H30.2-, which includes this code
  • H20.8 Other iridocyclitis
    posterior cyclitis (H30.2-) names H30.2-, which includes this code

Clinical ClassificationClinical

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

CCSR EYE005
Retinal and vitreous conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR EYE004
Uveitis and ocular inflammation
Default principal diagnosis: inpatient Yes · outpatient Yes

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 H30.23 to ICD-9-CMHistory

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

ICD-9-CM
363.21 Pars planitis
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 H30.23Overview

What is the ICD-10 code for posterior cyclitis, bilateral?

The ICD-10-CM code for posterior cyclitis, bilateral is H30.23 (sometimes written as H3023). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H30.23 (Posterior cyclitis) a billable code?

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

What MS-DRG does H30.23 group to?

When posterior cyclitis, 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 H30.23?

Under the General Equivalence Mappings, posterior cyclitis, bilateral converts to ICD-9-CM 363.21 (pars planitis). The mapping is approximate, so confirm the match fits the documentation.