CPT code 92100: Serial tonometry2026 Medicare rate & RVUs in Delaware
Serial tonometry records repeated eye-pressure readings over an extended period to assess pressure variation in patients with suspected or known glaucoma.
Medicare pays $83.77 for 92100 in the office in Delaware (Delaware). Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 92100 covers
Serial tonometry captures intraocular pressure at multiple points over an extended period, rather than relying on a single reading. An ophthalmologist or optometrist may use it when evaluating suspected or established glaucoma, particularly when pressure fluctuation is clinically relevant. Readings are obtained in an eye-care setting, with the clinician interpreting the results and documenting a report.
Report 92100 when the service includes the repeated measurements and interpretation, not for a single pressure check. Documentation should identify the clinical reason for serial testing, the readings and times, the eye or eyes measured, and the interpretation. CMS prices this code as bilateral; adding modifier 50 does not increase payment.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
92100 in Delaware
| Payment locality | Office | Facility |
|---|---|---|
| Delaware | $83.77 | $26.02 |
How the 92100 rate is calculated
Each of 92100’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 92100
RVUs × geographic indexes × conversion factor
Work0.59
0.59 RVUs× 1.000 GPCI
Practice expense1.92
1.92 RVUs× 1.000 GPCI
Malpractice0.02
0.02 RVUs× 1.000 GPCI
Adjusted RVUs
2.5300
Conversion factor
$33.4009
Medicare rate
$84.50
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 92100
The CMS indicators that decide how 92100 is paid alongside other services.
CMS payment indicators · 92100
Serial tonometry
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 2 | Already bilateral by definition: paid once at 100%. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
92100 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 92133Optic nerve OCT
- 92133 captures optic nerve imaging by OCT. Choose 92100 for repeated intraocular pressure readings over time, not for the imaging study.
- 92145Corneal testing
- 92145 measures corneal hysteresis. It evaluates a different corneal response and does not represent serial intraocular pressure readings.
- 92020Gonioscopy
- 92020 reports gonioscopy, an examination of the drainage angle. It is distinct from repeated pressure measurement and interpretation under 92100.
92100 billing questions
When should 92100 be chosen instead of a single tonometry measurement?
Use 92100 when multiple intraocular pressure readings are obtained over an extended period and interpreted. A single pressure reading does not describe serial tonometry.
Can modifier 50 be used to increase payment for bilateral testing?
No. CMS prices 92100 as bilateral, and modifier 50 does not increase payment.
What documentation supports 92100?
Record the clinical reason for serial testing, the pressure readings and measurement times, the eye or eyes tested, and the clinician’s interpretation.
Is 92100 appropriate for every pressure check during a glaucoma visit?
No. The service must involve repeated pressure measurements over an extended period with interpretation, rather than only a routine single reading.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
Fee sheets
Put 92100 and the rest of your codes on one sheet
Build a fee sheet from your own code list at your locality, put your payer contracts beside Medicare, and see what changed each quarter.
Build my fee sheetOr price your code list free →