Ewen Audrey Chao, MD
Student in an Organized Health Care Education/Training Program · Stony Brook, NY
Ewen Audrey Chao, MD is a student in an organized health care education/training program with a practice address in Stony Brook, New York, and NPI 1326434929, issued on Apr 9, 2015. Check the license with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ewen Audrey Chao
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- Department OF Surgery, Stony Brook, NY 11794
- Phone
- (631) 444-1791
- Enumerated
- Apr 9, 2015
- Record last updated
- Oct 27, 2023
- Fax
- (631) 444-7689
- Medicare enrollment
- Enrolled (PECOS I20231122003460); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 37,241 in New York → Look up another NPI →
Also registered at Department OF Surgery
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Margolis, M.D.Vascular Surgery Physician1083907836
Verify Ewen Audrey Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average student in an organized health care education/training program in 2024
221 Medicare Part D claims for 104 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Ciprofloxacin-Dexamethasone23 claims
- Amoxicillin-Clavulanate Potass20 claims
- Ofloxacin19 claims
- Fluticasone Propionate13 claims
- Ipratropium Bromide13 claims
- Ondansetron Odt13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 98.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Southern California Permanente Medical GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ewen Audrey Chao among 37,241 student in an organized health care education/training program records in New York
Ewen Audrey Chao, MD is one of 37,241 student in an organized health care education/training program records with a practice address in New York. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 8% of them.
- NPI issued2015 · 8% of these records are older, 91% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 5% of these records are
- Graduated2015 · median 2018 among the 1,821 with a school on file
- Record last updated2023 · 24% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
884 student in an organized health care education/training program records list a practice address in Stony Brook
They are 884 of the 3,053 NPPES records with a practice address in Stony Brook, and 37,241 student in an organized health care education/training program records in New York.
All 37,241 in New York → Every provider in Stony Brook → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Jeff Chuang, MDStony Brook, NY 117941033379425
- Salma El Gendi, MDStony Brook, NY 117941659531168
- Vasileios Kostaras, MDStony Brook, NY 117941144487968
- Sabina Mir, MDStony Brook, NY 117941144492703
- David Orbach, MD, MSStony Brook, NY 117941104083989
- Danielo Perez, MDStony Brook, NY 117941851562656
- Niti Rayjada, MDStony Brook, NY 117941720259609
- Betty Samuel, DDSStony Brook, NY 117941952561342
Common questions
What is Ewen Audrey Chao, MD's NPI number?
Ewen Audrey Chao, MD's National Provider Identifier (NPI) is 1326434929, issued on Apr 9, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ewen Audrey Chao, MD located?
The NPPES record lists a practice address at Department OF Surgery, Stony Brook, NY, 11794. Phone: (631) 444-1791. Providers update this record themselves, so call before visiting.
How can I verify Ewen Audrey Chao, MD's license?
Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Ewen Audrey Chao, MD prescribe under Medicare Part D?
In 2024, Ewen Audrey Chao, MD had 221 Medicare Part D claims for 104 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
What is Ewen Audrey Chao, MD's MIPS final score?
The 2023 MIPS final score is 98.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.