Ewen Chao, MD
NPI 1326434929 · Student in an Organized Health Care Education/Training Program · Stony Brook, NY
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ewen Chao, MD is a Student in an Organized Health Care Education/Training Program provider in Stony Brook, NY (NPI 1326434929).
Provider details
- NPI number
- 1326434929
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ciprofloxacin Hcl/Dexamethbrand: Ciprofloxacin-Dexamethasone | 23 | 18 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 20 | 19 |
| Ofloxacin | 19 | 17 |
| Fluticasone Propionate | 13 | — |
| Ipratropium Bromide | 13 | — |
| Ondansetronbrand: Ondansetron Odt | 13 | 11 |
| Dexamethasone | 11 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-09
- Last updated
- 2023-10-27
Frequently asked questions
- What is Ewen Chao's NPI number?
- Ewen Chao's National Provider Identifier (NPI) is 1326434929, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ewen Chao's specialty?
- Ewen Chao is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Ewen Chao located?
- Ewen Chao's practice location on file with NPPES is Department of Surgery, Stony Brook, NY 11794-8191.
- What is Ewen Chao's phone number?
- The practice phone number listed in the NPPES registry for Ewen Chao is (631) 444-1791.
- Does Ewen Chao accept Medicare?
- Ewen Chao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ewen Chao's NPI active?
- Yes — Ewen Chao's NPI (1326434929) is active in the NPPES registry as of the last update on 2023-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.