NPPES file of Aug 9, 2026

William Sidelinger, MD

Child & Adolescent Psychiatry Physician · Worcester, MA

William Sidelinger, MD is a child & adolescent psychiatry physician with a practice address in Worcester, Massachusetts, and NPI 1467071209, issued on Apr 12, 2020. Check the license (Massachusetts 1023236, 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
1467071209
Name
William Sidelinger
Credential
MD
Primary taxonomy
Child & Adolescent Psychiatry Physician 2084P0804X
License number
1023236 MA
Self-reported in NPPES; status is on the state search
Practice location
309 Belmont St, Worcester, MA 01604
Phone
(508) 368-3300
Enumerated
Apr 12, 2020
Record last updated
Jun 16, 2025
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.
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8 nearest child & adolescent psychiatry physician records → All 336 in Massachusetts → Look up another NPI →

Also registered at 309 Belmont St

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

  1. Margaret AkintanPsychiatric/Mental Health Nurse Practitioner1639829880
  2. Regina Amorello, LICSWClinical Social Worker1154803153
  3. Ellen Annor, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1568339919
  4. Natalie Anumba, PH.D.Clinical Psychologist1497243133
  5. Jacqueline Barth, PA-CPhysician Assistant1750096202
  6. Jennifer Benger, PSY.D.Clinical Child & Adolescent Psychologist1346729514

Verify William Sidelinger 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 1023236    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

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William Sidelinger among 336 child & adolescent psychiatry physician records in Massachusetts

William Sidelinger, 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 2020, is newer than 94% of them.

  • NPI issued2020 · 94% of these records are older, 2% 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 Worcester → Child & Adolescent Psychiatry Physician nationwide →

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

  1. John Backman, M.D.Worcester, MA 016041801943816
  2. Xuejing Li, M.D.Worcester, MA 016041215342332
  3. Anne Lutz, M.D.Worcester, MA 016041356460505
  4. Bruce Meltzer, M.D.Worcester, MA 016041952466724
  5. Ludmilla Tonkonogy, MDWorcester, MA 016041659438026
  6. Nima Jahanforouz, DOWorcester, MA 016051730742826
  7. Sylvia Worrell, DOWorcester, MA 016051437475290
  8. David Cochran, M.D.Worcester, MA 016061952508020

Common questions

What is William Sidelinger, MD's NPI number?

William Sidelinger, MD's National Provider Identifier (NPI) is 1467071209, issued on Apr 12, 2020. An NPI identifies a provider in billing; it is not a license.

Where is William Sidelinger, MD located?

The NPPES record lists a practice address at 309 Belmont St, Worcester, MA, 01604. Phone: (508) 368-3300. Providers update this record themselves, so call before visiting.

How can I verify William Sidelinger, MD's license?

NPPES lists Massachusetts license number 1023236, 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.