Valid for Submission
H21.309 is a billable diagnosis code used to specify a medical diagnosis of idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eye. The code H21.309 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code H21.309 might also be used to specify conditions or terms like cyst of anterior chamber of eye, cyst of ciliary body, cyst of iris, idiopathic cyst of anterior chamber of eye, idiopathic cyst of ciliary body , idiopathic cyst of iris, etc.
Unspecified diagnosis codes like H21.309 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H21.309 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Cyst of anterior chamber of eye
- Cyst of ciliary body
- Cyst of iris
- Idiopathic cyst of anterior chamber of eye
- Idiopathic cyst of ciliary body
- Idiopathic cyst of iris
- Primary iris cyst
- Secondary iris cyst
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|124||OTHER DISORDERS OF THE EYE WITH MCC||02||1.3988|
|125||OTHER DISORDERS OF THE EYE WITHOUT MCC||02||0.8354|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert H21.309 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code H21.309 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Some eye problems are minor and don't last long. But some can lead to a permanent loss of vision.
Common eye problems include
- Refractive errors
- Cataracts - clouded lenses
- Optic nerve disorders, including glaucoma
- Retinal disorders - problems with the nerve layer at the back of the eye
- Macular degeneration - a disease that destroys sharp, central vision
- Diabetic eye problems
- Conjunctivitis - an infection also known as pink eye
Your best defense is to have regular checkups, because eye diseases do not always have symptoms. Early detection and treatment could prevent vision loss. See an eye care professional right away if you have a sudden change in vision, if everything looks dim, or if you see flashes of light. Other symptoms that need quick attention are pain, double vision, fluid coming from the eye, and inflammation.
NIH: National Eye Institute
[Learn More in MedlinePlus]