Quick answers
- Does Yvonne M. Tsai accept Medicare assignment?
- Yes. Medicare's clinician data says Yvonne M. Tsai accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Yvonne M. Tsai see?
- In 2024, CMS data shows 736 Original Medicare patients and 1,581 services for Yvonne M. Tsai. This counts Original Medicare only and measures volume, not quality.
- What is Yvonne M. Tsai's NPI number?
- 1518947969. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Yvonne M. Tsai, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 736 |
|---|---|
| Services billed to Medicare | 1,581 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient complete exam of visual system (92014)587 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)328 services
- Imaging of optic nerve (92133)203 services
- Imaging of retina (92134)184 services
- Exam of visual field with extended testing (92083)139 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure65%
- Arthritis40%
- Diabetes23%
- Anxiety22%
- Chronic kidney disease20%
Practice locations
Addresses where Yvonne M. Tsai is enrolled with Medicare (CMS data updated October 2, 2026).
- 472 Route 111Hampstead, NH 03841
- 472 State Route 111Hampstead, NH 03841 (603) 893‑2508
Specialties
- Ophthalmologyprimary
Other ophthalmologists in New Hampshire
Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Js Weill Medical College, Cornell University |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518947969 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians