John Pasquale Williams, MD
Child & Adolescent Psychiatry Physician · Bryn Mawr, PA
John Pasquale Williams, MD is a child & adolescent psychiatry physician with a practice address in Bryn Mawr, Pennsylvania, and NPI 1386700813, issued on Dec 29, 2006. Check the license (Pennsylvania MD429523, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John Pasquale Williams
- Credential
- MD
- Primary taxonomy
- Child & Adolescent Psychiatry Physician 2084P0804X
- License number
- MD429523 PA
Self-reported in NPPES; status is on the state search - Practice location
- 901 Glenbrook Ave, Bryn Mawr, PA 19010
- Phone
- (610) 880-0110
- Enumerated
- Dec 29, 2006
- Record last updated
- Apr 19, 2011 (not updated in 15 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest child & adolescent psychiatry physician records → All 398 in Pennsylvania → Look up another NPI →
Also registered at 901 Glenbrook Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dana Milakovic, PSYD, NCSPSchool Psychologist1699589655
- Gian MillesMental Health Counselor1487389797
- Deborah RojasMental Health Counselor1346905866
Verify John Pasquale Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD429523Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average child & adolescent psychiatry physician in 2024
245 Medicare Part D claims, against an average of 504 among the 3,545 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Vraylar39 claims
- Divalproex Sodium Er33 claims
- Sertraline Hcl28 claims
- Trifluoperazine Hcl28 claims
- Ziprasidone Hcl16 claims
- Benztropine Mesylate14 claims
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.
John Pasquale Williams among 398 child & adolescent psychiatry physician records in Pennsylvania
John Pasquale Williams, MD is one of 398 child & adolescent psychiatry physician records with a practice address in Pennsylvania. 57% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 70% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · 29% of these records are
- Record last updated2011 · 58% 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 Pennsylvania 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 Pennsylvania
There are 398 child & adolescent psychiatry physician records in Pennsylvania.
All 398 in Pennsylvania → Every provider in Bryn Mawr → Child & Adolescent Psychiatry Physician nationwide →
The 8 child & adolescent psychiatry physician records with the nearest ZIP codes
- Steven Rolfe, M.D.Bryn Mawr, PA 190101871719765
- Roomana Sheikh, M.D.Bryn Mawr, PA 190101801938857
- Jean Bai, M.D.Chester, PA 190131265631105
- Shane Danielson, M.D.Chester, PA 190131780706812
- Mary Lou Jazwinski, DOChester, PA 190131821169137
- Khin Khin, MDChester, PA 190131033249446
- Shelley Oxenhorn, MDChester, PA 190131427214121
- Shardha Sabesan, MDChester, PA 190131558437731
Common questions
What is John Pasquale Williams, MD's NPI number?
John Pasquale Williams, MD's National Provider Identifier (NPI) is 1386700813, issued on Dec 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Pasquale Williams, MD located?
The NPPES record lists a practice address at 901 Glenbrook Ave, Bryn Mawr, PA, 19010. Phone: (610) 880-0110. Providers update this record themselves, so call before visiting.
How can I verify John Pasquale Williams, MD's license?
NPPES lists Pennsylvania license number MD429523, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Pasquale Williams, MD prescribe under Medicare Part D?
In 2024, John Pasquale Williams, MD had 245 Medicare Part D claims; the average among child & adolescent psychiatry physician prescribers was 504. 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.