Billing code 92100: Serial tonometryMedicare rate & RVUs
Serial tonometry records repeated eye-pressure readings over an extended period to assess pressure variation in patients with suspected or known glaucoma.
Medicare pays $84.50 for 92100 nationally in the office and $26.05 in a hospital or facility. Local office rates run $75.14–$114.71.
Medicare rate · 92100
Serial tonometry
Swap in your local Medicare rate.
- Work RVUs
- 0.59
- Total RVUs
- 2.53
- Global days
- XXX
National rate · 2026
$84.50
Office setting, before claim adjustments.
See every locality for 92100 → · Billed by an NP, PA or therapist? →
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 10 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.
Where 92100 pays more and less
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
109 payment localities
$75.14 to $114.71
109 of 109 payment localities
92100 rates by state
Office rate range in each state. Select a state to see its payment localities.
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Local rates. Clear comparisons.
Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.
$75.14
$102.70
Color shows the midpoint of each state’s locality range.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | $98.23 | 1 |
| AL | $76.20 | 1 |
| AR | $75.14 | 1 |
| AZ | $82.42 | 1 |
| CA | $90.69–$114.71 | 29 |
| CO | $88.70 | 1 |
| CT | $89.98 | 1 |
| DC | $97.06 | 1 |
| DE | $83.77 | 1 |
| FL | $82.02–$88.15 | 3 |
| GA | $77.71–$85.72 | 2 |
| GU | $93.01 | 1 |
| HI | $93.01 | 1 |
| IA | $78.65 | 1 |
| ID | $79.02 | 1 |
| IL | $79.30–$86.89 | 4 |
| IN | $79.48 | 1 |
| KS | $78.02 | 1 |
| KY | $77.33 | 1 |
| LA | $77.10–$80.81 | 2 |
| MA | $88.08–$97.68 | 2 |
| MD | $85.42–$97.06 | 3 |
| ME | $79.12–$83.68 | 2 |
| MI | $79.01–$82.72 | 2 |
| MN | $85.89 | 1 |
| MO | $75.64–$81.43 | 3 |
| MS | $75.42 | 1 |
| MT | $84.50 | 1 |
| NC | $79.97 | 1 |
| ND | $84.11 | 1 |
| NE | $79.15 | 1 |
| NH | $87.05 | 1 |
| NJ | $91.26–$96.05 | 2 |
| NM | $79.32 | 1 |
| NV | $84.46 | 1 |
| NY | $81.10–$98.46 | 5 |
| OH | $78.93 | 1 |
| OK | $77.49 | 1 |
| OR | $84.05–$91.77 | 2 |
| PA | $79.21–$87.62 | 2 |
| PR | $85.20 | 1 |
| RI | $86.92 | 1 |
| SC | $79.53 | 1 |
| SD | $84.06 | 1 |
| TN | $78.36 | 1 |
| TX | $78.69–$88.19 | 8 |
| UT | $80.59 | 1 |
| VA | $83.22–$97.06 | 2 |
| VI | $85.20 | 1 |
| VT | $83.53 | 1 |
| WA | $88.00–$99.92 | 2 |
| WI | $81.35 | 1 |
| WV | $76.39 | 1 |
| WY | $84.33 | 1 |
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
Swap in your local Medicare rate.
Work 0.59Practice expense 1.92Malpractice 0.02
All indexes start 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
92100 vs 92133 vs 92145 vs 92020: national Medicare rates
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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
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