Hoang-Oanh Thi Doan, DO
Internal Medicine Physician · Watertown, MA
Hoang-Oanh Thi Doan, DO is an internal medicine physician with a practice address in Watertown, Massachusetts, and NPI 1760843619, issued on Mar 18, 2016. Check the license (Massachusetts 278251, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Hoang-Oanh Thi Doan
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 278251 MA
Self-reported in NPPES; status is on the state search - Practice location
- 63 Pleasant St, Watertown, MA 02472
- Phone
- (617) 924-6484
- Enumerated
- Mar 18, 2016
- Record last updated
- Dec 13, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191107000746); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 63 Pleasant St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Chasse, PT, ATCOrthopedic Physical Therapist1962072249
- Rosana Chow, MDObstetrics & Gynecology Physician1376514588
- Paul Kasuba, MDInternal Medicine Physician1851389969
- Stacie Mercer, FNPFamily Nurse Practitioner1942992656
- Matthew O'Connor, DPTOrthopedic Physical Therapist1922657543
- Kelsey QualeyPhysical Therapist1083457386
Verify Hoang-Oanh Thi Doan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 278251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
261 Medicare Part D claims for 94 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Lisinopril36 claims
- Torsemide30 claims
- Amlodipine Besylate26 claims
- Furosemide22 claims
- Chlorthalidone12 claims
- Jardiance11 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.
Bills Medicare through one group practice
- Woburn Nephrology Associates PCStoneham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hoang-Oanh Thi Doan among 6,825 internal medicine physician records in Massachusetts
Hoang-Oanh Thi Doan, DO is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 77% of them.
- NPI issued2016 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2016 · median 2004 among the 4,103 with a school on file
- Record last updated2019 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 internal medicine physician records list a practice address in Watertown
They are 28 of the 873 NPPES records with a practice address in Watertown, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Watertown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mark Bauer, M.D.Watertown, MA 024721487625307
- David Cancian, MDWatertown, MA 024721962496539
- Andrew Cutler, MDWatertown, MA 024721437159720
- Paul Fergus, MDWatertown, MA 024721356336200
- Richard Galgano, D.O.Watertown, MA 024721225003569
- Paul Kasuba, MDWatertown, MA 024721851389969
- Robert Kelleher, MDWatertown, MA 024721891761714
- Joo Kim, M.D.Watertown, MA 024721497724173
Common questions
What is Hoang-Oanh Thi Doan, DO's NPI number?
Hoang-Oanh Thi Doan, DO's National Provider Identifier (NPI) is 1760843619, issued on Mar 18, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Hoang-Oanh Thi Doan, DO located?
The NPPES record lists a practice address at 63 Pleasant St, Watertown, MA, 02472. Phone: (617) 924-6484. Providers update this record themselves, so call before visiting.
How can I verify Hoang-Oanh Thi Doan, DO's license?
NPPES lists Massachusetts license number 278251, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hoang-Oanh Thi Doan, DO prescribe under Medicare Part D?
In 2024, Hoang-Oanh Thi Doan, DO had 261 Medicare Part D claims for 94 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.