William Moore Vanneman, M.D.
Gastroenterology Physician · Winchester, MA
William Moore Vanneman, M.D. is a gastroenterology physician with a practice address in Winchester, Massachusetts, and NPI 1124075718, issued on May 28, 2006. Check the license (Massachusetts 38046, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Moore Vanneman
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 38046 MA
Self-reported in NPPES; status is on the state search - Practice location
- 955 Main St, Winchester, MA 01890
- Phone
- (781) 729-5855
- Enumerated
- May 28, 2006
- Record last updated
- Nov 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (781) 721-5891
- Medicaid ID
- 0160725 MA
- Medicare enrollment
- Enrolled (PECOS I20101215000308); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1970
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 955 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Moore Vanneman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 38046Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average gastroenterology physician in 2024
42 Medicare Part D claims for 22 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
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
- Berkshire Faculty Services IncPittsfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Moore Vanneman among 686 gastroenterology physician records in Massachusetts
William Moore Vanneman, M.D. is one of 686 gastroenterology physician records with a practice address in Massachusetts. 80% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1970 · median 2004 among the 491 with a school on file
- Record last updated2012 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Massachusetts
There are 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in Winchester → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sanjay Hegde, MDWinchester, MA 018901881756179
- Eric Libby, M.D.Winchester, MA 018901922048016
- Bertil Wolf, MDLynn, MA 019041871549535
- Michael Aaronson, MDBeverly, MA 019151366547739
- Michael Demarkles, MDBeverly, MA 019151376578534
- Richard Einhorn, MDBeverly, MA 019151639104896
- Martin Hahn, M.D.Beverly, MA 019151770698730
- Maria LonshteynBeverly, MA 019151720247653
Common questions
What is William Moore Vanneman, M.D.'s NPI number?
William Moore Vanneman, M.D.'s National Provider Identifier (NPI) is 1124075718, issued on May 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Moore Vanneman, M.D. located?
The NPPES record lists a practice address at 955 Main St, Winchester, MA, 01890. Phone: (781) 729-5855. Providers update this record themselves, so call before visiting.
How can I verify William Moore Vanneman, M.D.'s license?
NPPES lists Massachusetts license number 38046, 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 William Moore Vanneman, M.D. prescribe under Medicare Part D?
In 2024, William Moore Vanneman, M.D. had 42 Medicare Part D claims for 22 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.