2027 ICD-10-CM Diagnosis Code H30.121Disseminated chorioretinal inflammation, peripheral right eye

ICD-10-CM Codes›H00–H59›H30-H36›H30

ICD-10-CM H30.121
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H30.121 is a billable ICD-10-CM diagnosis code for disseminated chorioretinal inflammation, peripheral 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. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 56 closely related codes. Coders also document this condition as disseminated chorioretinitis of right eye. 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
H30.121
Billable Status
Yes — Valid for Submission
Code Describes
Disseminated chorioretinal inflammation, peripheral right eye
Short Description
Disseminated chorioretin inflammation, peripheral right eye
Parent Code
H30.12
Disseminated chorioretinal inflammation, peripheral

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH30Chorioretinal inflammation
This CodeH30.121Disseminated chorioretinal inflammation, peripheral right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disseminated chorioretinitis of right eye
  • Disseminated peripheral chorioretinitis
  • Peripheral disseminated choroiditis
  • Peripheral disseminated choroiditis of right eye
  • Right disseminated peripheral chorioretinitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H30.121: its own notes plus those printed at H30.1 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 H30.1 Disseminated chorioretinal inflammation applies to 20 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 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 H30.121 to ICD-9-CMHistory

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

ICD-9-CM
363.12 Periph disem choroiditis
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 H30.121Overview

What is the ICD-10 code for disseminated chorioretinal inflammation, peripheral right eye?

The ICD-10-CM code for disseminated chorioretinal inflammation, peripheral right eye is H30.121 (sometimes written as H30121). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H30.121 (Disseminated chorioretinal inflammation, peripheral) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disseminated chorioretinal inflammation, peripheral right eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H30.121 group to?

When disseminated chorioretinal inflammation, peripheral 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.

Is H30.121 a CC or MCC?

CMS lists H30.121 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 56 closely related codes in its exclusion list.

What is the ICD-9 equivalent of H30.121?

Under the General Equivalence Mappings, disseminated chorioretinal inflammation, peripheral right eye converts to ICD-9-CM 363.12 (periph disem choroiditis). The mapping is approximate, so confirm the match fits the documentation.