Summary & Overview
CPT 92100: Serial Intraocular Pressure Monitoring
CPT code 92100 denotes serial intraocular pressure (IOP) measurements taken over a single day to document diurnal pressure changes or monitor response to glaucoma therapy. Nationally, this code supports clinical decision-making in glaucoma management and postoperative care where pressure variability influences treatment. It is commonly billed by ophthalmologists and optometrists in outpatient eye clinics and specialty practices.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and service setting, typical billing considerations, payer coverage context, and where CPT code 92100 fits among related ophthalmic diagnostic services. The publication highlights benchmark usage patterns, coding nuances relevant to serial IOP testing, and policy updates that affect coverage and documentation expectations. Data not available in the input for specific modifiers, taxonomies, ICD-10 pairings, and related codes are noted as such and are not inferred.
Billing Code Overview
CPT code 92100 covers multiple measurements of intraocular pressure taken over a single day to monitor response to treatment or to document pressure fluctuations throughout the day. This service involves repeated tonometry readings at defined intervals to assess diurnal variation or therapeutic effect.
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Service type: Diagnostic ophthalmic testing (serial intraocular pressure monitoring)
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Typical site of service: Ophthalmology clinic or outpatient eye care facility
Clinical & Coding Specifications
Clinical Context
A typical patient is a 65-year-old with primary open-angle glaucoma on topical intraocular pressure (IOP)–lowering medications who presents for evaluation of IOP control. The ophthalmic technician or nurse performs serial IOP measurements using applanation tonometry or a handheld tonometer at several time points during a single clinic day (for example, morning, mid-day, and afternoon) to document diurnal fluctuation or response to a medication change. The workflow: patient check-in and medication reconciliation; baseline visual acuity and brief slit-lamp exam by technician; baseline IOP measurement; subsequent IOP measurements taken over the course of the day as ordered by the treating ophthalmologist; documentation of each measurement with time stamps and any interventions; final interpretation and plan documented by the physician. Typical site of service is an ophthalmology clinic or ambulatory eye center where serial same-day IOP monitoring is performed to guide treatment decisions such as medication adjustment or consideration of procedural therapy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Principal or first-listed procedure | When 92100 is the primary procedure performed and billed for the encounter |