NPPES file of Aug 9, 2026

William R. Beardslee, MD

Child & Adolescent Psychiatry Physician · Boston, MA

William R. Beardslee, MD is a child & adolescent psychiatry physician with a practice address in Boston, Massachusetts, and NPI 1386723484, issued on Nov 2, 2006. Check the license (Massachusetts 34475, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1386723484
Name
William R. Beardslee
Credential
MD
Primary taxonomy
Child & Adolescent Psychiatry Physician 2084P0804X
License number
34475 MA
Self-reported in NPPES; status is on the state search
Practice location
300 Longwood Ave, Boston, MA 02115
Phone
(617) 355-6087
Enumerated
Nov 2, 2006
Record last updated
Sep 11, 2025
Fax
(617) 730-0271
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest child & adolescent psychiatry physician records → All 336 in Massachusetts → Look up another NPI →

Also registered at 300 Longwood Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sylvia Abadir, MDPediatric Cardiology Physician1427366459
  2. Isabel Abbott, MDNeurology with Special Qualifications in Child Neurology Physician1033772579
  3. Kristin Abdelnour, PTPhysical Therapist1982821302
  4. Mohamed Abdelrahman, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1558050591
  5. Nadia Abdulrazak, N.P.Adult Health Nurse Practitioner1952616682
  6. Dhatri AbeyaratneStudent in an Organized Health Care Education/Training Program1437098233

Verify William R. Beardslee in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 34475    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

William R. Beardslee among 336 child & adolescent psychiatry physician records in Massachusetts

William R. Beardslee, MD is one of 336 child & adolescent psychiatry physician records with a practice address in Massachusetts. 51% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.

  • NPI issued2006 · 8% of these records are older, 53% newer
  • In a Medicare fileNo · 51% of these records are
  • In the CMS Doctors and Clinicians fileNo · 29% of these records are
  • Record last updated2025 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0804X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Child & Adolescent Psychiatry Physician providers in Massachusetts

There are 336 child & adolescent psychiatry physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 336 in Massachusetts → Every provider in Boston → Child & Adolescent Psychiatry Physician nationwide →

The 8 child & adolescent psychiatry physician records with the nearest ZIP codes

  1. Myron Belfer, M.D.Boston, MA 021151568409209
  2. Henrietta Cooper, MDBoston, MA 021151194798660
  3. David Demaso, MDBoston, MA 021151831163658
  4. Stacy Drury, M.D., PH.D.Boston, MA 021151316945116
  5. Tatjana Dujmic, M.D. PHDBoston, MA 021151336289099
  6. Georgina Garcia-Soiffer, MDBoston, MA 021151366407801
  7. Mary Margaret Gleason, MDBoston, MA 021151023136389
  8. Stuart Goldman, MDBoston, MA 021151467524991

Common questions

What is William R. Beardslee, MD's NPI number?

William R. Beardslee, MD's National Provider Identifier (NPI) is 1386723484, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William R. Beardslee, MD located?

The NPPES record lists a practice address at 300 Longwood Ave, Boston, MA, 02115. Phone: (617) 355-6087. Providers update this record themselves, so call before visiting.

How can I verify William R. Beardslee, MD's license?

NPPES lists Massachusetts license number 34475, 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. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.