Summary & Overview
HCPCS Level II M1326: Patients with Diagnosis of Hypotony
HCPCS Level II code M1326 denotes services for patients diagnosed with hypotony, a condition of abnormally low intraocular pressure that can threaten vision and require targeted ophthalmic assessment or intervention. Nationally, accurate coding for hypotony-related care supports appropriate tracking of ophthalmic quality measures and reimbursement for specialized evaluation or procedural management. Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what M1326 represents clinically, how major payers approach coverage in general terms, and the typical clinical contexts where the code is applied. The publication also outlines available benchmarks, common billing considerations, and relevant policy updates that affect national coding practices for ocular hypotony. The piece supplies clinical context about typical sites of service and service types tied to the code, and identifies areas where additional payer-specific detail or mapping to diagnosis codes may be needed. Data not available in the input is noted where payer-specific rules, ICD-10 mappings, and associated taxonomies are not provided.
Billing Code Overview
HCPCS Level II code M1326 is used for billing services for patients with a diagnosis of hypotony. The code represents clinical encounters or interventions directed at low intraocular pressure conditions that require assessment, monitoring, or treatment planning related to hypotony.
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Service type: Clinical evaluation and management or procedure-related services for hypotony
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Typical site of service: Ophthalmology clinic or surgical setting where diagnosis and management of ocular hypotony occur
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred to an ophthalmology clinic for evaluation and management of ocular hypotony (abnormally low intraocular pressure). The patient often presents with blurry vision, eye pain or discomfort, decreased visual acuity, or choroidal folds following recent glaucoma surgery, intraocular inflammation, or trauma. Clinical workflow includes intake vitals and ocular history, targeted ocular exam including visual acuity and slit-lamp examination, measurement of intraocular pressure with applanation tonometry, dilated fundus exam to assess for choroidal effusion or maculopathy, and imaging as indicated (optical coherence tomography, B-scan ultrasound). Management steps documented under this billing descriptor may include diagnostic assessment, topical or systemic medical therapy initiation, subconjunctival injections, surgical revision of filtering procedures, or observation with serial pressure checks. Procedure documentation should note the diagnosis of hypotony using M1326, the laterality, clinical findings, treatments rendered, informed consent, time spent counseling, and any applicable modifier (for example when services are reduced, discontinued, or performed under unusual circumstances). Typical site of service is an ophthalmology clinic or ambulatory surgical center; inpatient encounters may occur for complicated postoperative hypotony requiring urgent surgical intervention.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 |