2027 ICD-10-CM Diagnosis Code H35.82Retinal ischemia
ICD-10-CM Codes›H00–H59›H30-H36›H35
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
H35.82 is a billable ICD-10-CM diagnosis code for retinal ischemia. 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 7 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Retinal and vitreous conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral ischemia of retina of eyes
- Central retinal vein occlusion
- Central retinal vein occlusion - ischemic
- Choroidal ischemia
- Ischemia of retina of left eye
- Ischemia of retina of right eye
- Ischemic maculopathy
- Ischemic maculopathy due to occlusion of retinal branch vein
- Macular ischemia due to central retinal vein occlusion
- Paracentral acute middle maculopathy
- Retinal ischemia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H35.82: its own notes plus those printed at H35.8, 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.
- 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name H35.82, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 H35.82 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H35.82Overview
What is the ICD-10 code for retinal ischemia?
The ICD-10-CM code for retinal ischemia is H35.82 (sometimes written as H3582). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H35.82 (Other specified retinal disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report retinal ischemia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H35.82 group to?
When retinal ischemia 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 H35.82 a CC or MCC?
CMS lists H35.82 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 7 closely related codes in its exclusion list.
What is the ICD-9 equivalent of H35.82?
Under the General Equivalence Mappings, retinal ischemia converts to ICD-9-CM 362.84 (retinal ischemia). The mapping is a direct match.
