Michael Thomas Williams, DO
Emergency Medicine Physician · York, PA
Michael Thomas Williams, DO is an emergency medicine physician with a practice address in York, Pennsylvania, and NPI 1205097052, issued on Jun 24, 2008. Check the license (Pennsylvania OS015166, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Michael Thomas Williams
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- OS015166 PA
Self-reported in NPPES; status is on the state search - Practice location
- 325 S Belmont St, York, PA 17403
- Phone
- (800) 436-4326
- Enumerated
- Jun 24, 2008
- Record last updated
- Jul 10, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140812000176); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2008
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 325 S Belmont St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Thomas Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS015166Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% more Medicare Part D claims than the average emergency medicine physician in 2024
424 Medicare Part D claims for 280 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 113 claims were for opioids.
Most prescribed
- Oxycodone Hcl70 claims
- Albuterol Sulfate Hfa35 claims
- Cefuroxime33 claims
- Naloxone Hcl31 claims
- Oxycodone-Acetaminophen24 claims
- Methylprednisolone23 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Inphynet Contracting Services LLCTitusville, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Thomas Williams among 3,911 emergency medicine physician records in Pennsylvania
Michael Thomas Williams, DO is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 38% of them.
- NPI issued2008 · 38% of these records are older, 57% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2008 · median 2013 among the 2,231 with a school on file
- Record last updated2012 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
184 emergency medicine physician records list a practice address in York
They are 184 of the 4,575 NPPES records with a practice address in York, and 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in York → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- James Amsterdam, D.M.D., M.D.York, PA 174031003852807
- Ronald Benenson, M.D.York, PA 174031760410252
- Michael Bohrn, M.D.York, PA 174031912936444
- John Cole, MDYork, PA 174031144293531
- Aizad Dasti, M.D.York, PA 174031518995182
- Karen Dipasquale, DOYork, PA 174031902824535
- Thomas Falvo, D.O.York, PA 174031568492148
- Lynn Jensen, M.D.York, PA 174031508893256
Common questions
What is Michael Thomas Williams, DO's NPI number?
Michael Thomas Williams, DO's National Provider Identifier (NPI) is 1205097052, issued on Jun 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michael Thomas Williams, DO located?
The NPPES record lists a practice address at 325 S Belmont St, York, PA, 17403. Phone: (800) 436-4326. Providers update this record themselves, so call before visiting.
How can I verify Michael Thomas Williams, DO's license?
NPPES lists Pennsylvania license number OS015166, 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 Michael Thomas Williams, DO prescribe under Medicare Part D?
In 2024, Michael Thomas Williams, DO had 424 Medicare Part D claims for 280 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Michael Thomas Williams, DO's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.