Zafar I. Siddiqui, MD
Anesthesiology Physician · Westborough, MA
Zafar I. Siddiqui, MD is an anesthesiology physician with a practice address in Westborough, Massachusetts, and NPI 1134189624, issued on Mar 27, 2006. Check the license (Massachusetts 219575, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Zafar I. Siddiqui
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 219575 MA
Self-reported in NPPES; status is on the state search - Practice location
- 21 Thomas Newton Dr, Westborough, MA 01581
- Phone
- (508) 366-5012
- Enumerated
- Mar 27, 2006
- Record last updated
- Sep 20, 2022
- Medicaid ID
- 110035666A MA
- Medicare enrollment
- Enrolled (PECOS I20220725001591); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 2,089 in Massachusetts → Look up another NPI →
Verify Zafar I. Siddiqui in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 219575Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Amoskeag Anesthesia PLLCNashua, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zafar I. Siddiqui among 2,089 anesthesiology physician records in Massachusetts
Zafar I. Siddiqui, MD is one of 2,089 anesthesiology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 18% of them.
- NPI issued2006 · 18% of these records are older, 59% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1982 · median 2008 among the 1,472 with a school on file
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Massachusetts
There are 2,089 anesthesiology physician records in Massachusetts.
All 2,089 in Massachusetts → Every provider in Westborough → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- John Ewan, M.D.Dudley Hill, MA 015701386787851
- Stephanie Cintora, MDSouth Grafton, MA 015601609902097
- Mahmoud Aliouche, M.D.Worcester, MA 016051558343368
- Nicholas Barnard, M.D.Worcester, MA 016051811979628
- Agata Boland, M.D.Worcester, MA 016051154303964
- Kwok Chan, MDWorcester, MA 016051346211364
- David Drexler, M.D.Worcester, MA 016051669454484
- Stephen Kapaon, M.D.Worcester, MA 016051275515090
Common questions
What is Zafar I. Siddiqui, MD's NPI number?
Zafar I. Siddiqui, MD's National Provider Identifier (NPI) is 1134189624, issued on Mar 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Zafar I. Siddiqui, MD located?
The NPPES record lists a practice address at 21 Thomas Newton Dr, Westborough, MA, 01581. Phone: (508) 366-5012. Providers update this record themselves, so call before visiting.
How can I verify Zafar I. Siddiqui, MD's license?
NPPES lists Massachusetts license number 219575, 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.
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.