Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Sidelinger, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1467071209

Dr. William Sidelinger, MD is a Child & Adolescent Psychiatry Physician in Worcester, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2020.

Licensed in
MA
In the registry since
2020
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

309 Belmont St
Worcester, MA 01604-1059
Phone: (508) 368-3300
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence 1023236 (MA)

Record details

NPI number1467071209
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 12, 2020
Last updated in NPPESJune 16, 2025
Certification dateJune 16, 2025
Mailing address1601 23rd Avenue South, Training Office Suite 3105 Vph, Nashville, TN 37212

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