John Donald Williams
Physical Therapy Assistant · Silver Spring, MD
John Donald Williams is a physical therapy assistant with a practice address in Silver Spring, Maryland, and NPI 1659771269, issued on Sep 2, 2014. Check the license (Maryland A4164, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Donald Williams
- Primary taxonomy
- Physical Therapy Assistant 225200000X
- License number
- A4164 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3700 International Dr, Silver Spring, MD 20906
- Phone
- (301) 438-3023
- Enumerated
- Sep 2, 2014
- Record last updated
- Sep 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (301) 438-3024
- Entity
- Type 1 · individual
8 nearest physical therapy assistant records → All 1,294 in Maryland → Look up another NPI →
Also registered at 3700 International Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sandra Acs, OTOccupational Therapist1306199179
- Nicole Roy-Harrison, DPTPhysical Therapist1801263835
Verify John Donald Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license A4164Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John Donald Williams among 1,294 physical therapy assistant records in Maryland
John Donald Williams is one of 1,294 physical therapy assistant records with a practice address in Maryland. 0% 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 2014, is newer than 35% of them.
- NPI issued2014 · 35% of these records are older, 60% newer
- In a Medicare fileNo · 0% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2014 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225200000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Therapy Assistant providers in Maryland
There are 1,294 physical therapy assistant records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,294 in Maryland → Every provider in Silver Spring → Physical Therapy Assistant nationwide →
The 8 physical therapy assistant records with the nearest ZIP codes
- Alan AntonacciSilver Spring, MD 209061629652318
- Aaron CookSilver Spring, MD 209061124542048
- Bradley IllescasSilver Spring, MD 209061093355497
- Mohammed Jawara, PTASilver Spring, MD 209061659573491
- Deborah Kroggel, PTASilver Spring, MD 209061700093572
- Ryan Regner, PTASilver Spring, MD 209061053989616
- Sonya SchwabSilver Spring, MD 209061023351301
- Diana SwensonSilver Spring, MD 209061700216637
Common questions
What is John Donald Williams's NPI number?
John Donald Williams's National Provider Identifier (NPI) is 1659771269, issued on Sep 2, 2014. An NPI identifies a provider in billing; it is not a license.
Where is John Donald Williams located?
The NPPES record lists a practice address at 3700 International Dr, Silver Spring, MD, 20906. Phone: (301) 438-3023. Providers update this record themselves, so call before visiting.
How can I verify John Donald Williams's license?
NPPES lists Maryland license number A4164, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity 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. 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.