2027 ICD-10-CM Diagnosis Code H31.109Choroidal degeneration, unspecified, unspecified eye
ICD-10-CM Codes›H00–H59›H30-H36›H31
- Billable — Valid for Submission
- Chronic Condition
H31.109 is a billable ICD-10-CM diagnosis code for choroidal degeneration, unspecified, unspecified 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. 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.
- Chorioretinal atrophy
- Chorioretinal degeneration
- Choroidal atrophy
- Choroidal atrophy and alopecia syndrome
- Choroidal degeneration
- Choroidal sclerosis
- Diffuse choroidal sclerosis
- Helicoid peripapillary chorioretinal degeneration
- Hereditary choroidal dystrophy
- Hyaline dystrophy of Bruch's membrane
- Macular choroidal sclerosis
- Microcornea
- Microcornea, myopic chorioretinal atrophy, telecanthus syndrome
- Peripapillary atrophy
- Peripheral exudative hemorrhagic chorioretinopathy
- Pigmented paravenous retinochoroidal atrophy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H31.109: its own notes plus those printed at H31.1 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.
- 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 H31.109, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming H31.109: 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 H31.109 is one of the codes named.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Eye Diseases
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Convert H31.109 to ICD-9-CMHistory
Code HistoryHistory
Questions About H31.109Overview
What is the ICD-10 code for choroidal degeneration, unspecified, unspecified eye?
The ICD-10-CM code for choroidal degeneration, unspecified, unspecified eye is H31.109 (sometimes written as H31109). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H31.109 (Unspecified choroidal degeneration) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report choroidal degeneration, unspecified, unspecified eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H31.109 group to?
When choroidal degeneration, unspecified, unspecified 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.
What is the ICD-9 equivalent of H31.109?
Under the General Equivalence Mappings, choroidal degeneration, unspecified, unspecified eye converts to ICD-9-CM 362.77 (bruch membrane dystrophy) and 363.40 (choroidal degen NOS). The mapping is approximate, so confirm the match fits the documentation.
