2027 ICD-10-CM Diagnosis Code H31.20Hereditary choroidal dystrophy, unspecified
ICD-10-CM Codes›H00–H59›H30-H36›H31
- Billable — Valid for Submission
- Chronic Condition
H31.20 is a billable ICD-10-CM diagnosis code for hereditary choroidal dystrophy, unspecified. 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 autosomal dominant vitreoretinochoroidopathy. 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.
- Autosomal dominant vitreoretinochoroidopathy
- Boucher Neuhäuser syndrome
- Choroidal dystrophy
- Congenital chorioretinal degeneration
- Congenital ectopic lens
- Ectopia lentis, chorioretinal dystrophy, myopia syndrome
- Hereditary choroidal dystrophy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H31.20: its own notes plus those printed at H31.2 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 H31.20, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming H31.20: they are not reported together with it, unless the two conditions are unrelated.
Use Additional Code 1
These codes say to use an additional code from the note, and H31.20 is one of the codes named.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
chorioretinal See Also: Degeneration, choroid;
hereditary H31.20
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Eye Diseases
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Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H31.20 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H31.20Overview
What is the ICD-10 code for hereditary choroidal dystrophy, unspecified?
The ICD-10-CM code for hereditary choroidal dystrophy, unspecified is H31.20 (sometimes written as H3120). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H31.20 (Hereditary choroidal dystrophy) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report hereditary choroidal dystrophy, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H31.20 group to?
When hereditary choroidal dystrophy, unspecified 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 H31.20?
Under the General Equivalence Mappings, hereditary choroidal dystrophy, unspecified converts to ICD-9-CM 363.50 (hered choroid atroph NOS). The mapping is a direct match.
