Quick answers
- Does Kathryn J. Siu accept Medicare assignment?
- Yes. Medicare's clinician data says Kathryn J. Siu 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 Kathryn J. Siu see?
- In 2024, CMS data shows 22 Original Medicare patients and 47 services for Kathryn J. Siu. This counts Original Medicare only and measures volume, not quality.
- What is Kathryn J. Siu's NPI number?
- 1720772130. 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 Kathryn J. Siu, 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 | 22 |
|---|---|
| Services billed to Medicare | 47 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Test to assess middle ear function (92567)18 services
- Comprehensive hearing and speech recognition test (92557)16 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 blood pressure75%
- High cholesterol73%
- Arthritis50%
Practice locations
Addresses where Kathryn J. Siu is enrolled with Medicare (CMS data updated October 2, 2026).
- 9 Washington AveHamden, CT 06518 (203) 248‑8409
Group practices
Medicare enrollment lists Kathryn J. Siu as a member of this group (CMS data updated October 2, 2026).
- Ear Nose and Throat Specialists of Ct PC7 clinicians in the group
Specialties
- Qualified Audiologistprimary
Other audiologists in Hamden
Clinicians with the same Medicare primary specialty in Hamden, CT — not a recommendation.
Other clinicians in Ear Nose and Throat Specialists of Ct PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | AU |
|---|---|
| School | Washington University School Of Medicine |
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720772130 |
| 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