Margaret Siu
Surgery Physician · Springfield, MA
Margaret Siu is a surgery physician with a practice address in Springfield, Massachusetts, and NPI 1427518455, issued on Mar 25, 2019. Check the license on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Margaret Siu
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- D0104111 MD
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut St, Springfield, MA 01199
- Phone
- (413) 794-0000
- Enumerated
- Mar 25, 2019
- Record last updated
- Jun 2, 2026
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 1,003 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Abad, MDStudent in an Organized Health Care Education/Training Program1063351823
- Ramsha Abbas, MBBSStudent in an Organized Health Care Education/Training Program1619679693
- Mohamed Abdelazeem, MDStudent in an Organized Health Care Education/Training Program1720606551
- Rishard Abdul, M.B.B.SCardiovascular Disease Physician1114412830
- Mohammed AbozenahStudent in an Organized Health Care Education/Training Program1457839805
- Saeed Abughazaleh, MDCardiovascular Disease Physician1427782762
Verify Margaret Siu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average surgery physician in 2024
64 Medicare Part D claims for 47 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Oxycodone Hcl29 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.
Margaret Siu among 1,003 surgery physician records in Massachusetts
Margaret Siu is one of 1,003 surgery physician records with a practice address in Massachusetts. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 82% of them.
- NPI issued2019 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Massachusetts
There are 1,003 surgery physician records in Massachusetts.
All 1,003 in Massachusetts → Every provider in Springfield → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- David Earle, MDSpringfield, MA 011991780779934
- Richard Engelman, MDSpringfield, MA 011991134203565
- Milagros Lopez GerenaSpringfield, MA 011991922460039
- Victoria Ruvkun, MDSpringfield, MA 011991609679018
- Parth SharmaSpringfield, MA 011991639568421
- Jonathan Winalski, MDSpringfield, MA 011991407483811
- Ya Zhou, M.D.Springfield, MA 011991750813648
- Fozan Aldulaijan, M.D.Pittsfield, MA 012011841505369
Common questions
What is Margaret Siu's NPI number?
Margaret Siu's National Provider Identifier (NPI) is 1427518455, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Siu located?
The NPPES record lists a practice address at 759 Chestnut St, Springfield, MA, 01199. Phone: (413) 794-0000. Providers update this record themselves, so call before visiting.
How can I verify Margaret Siu's license?
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 Margaret Siu prescribe under Medicare Part D?
In 2024, Margaret Siu had 64 Medicare Part D claims for 47 beneficiaries; the average among surgery physician prescribers was 147. 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.