Calvin Thomas Williams, M.D. / PH.D
Infectious Disease Physician · Baltimore, MD
Calvin Thomas Williams, M.D. / PH.D is an infectious disease physician with a practice address in Baltimore, Maryland, and NPI 1023308640, issued on Apr 15, 2011. Check the license (Maryland D0081038, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Calvin Thomas Williams
- Credential
- M.D. / PH.D
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- D0081038 MD
C7-0004863 DE
Self-reported in NPPES; status is on the state search - Practice location
- 201 E University Pkwy, Baltimore, MD 21218
- Phone
- (443) 474-9911
- Enumerated
- Apr 15, 2011
- Record last updated
- Apr 24, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160823000751); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 410 in Maryland → Look up another NPI →
Also registered at 201 E University Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Addis, DPTPhysical Therapist1457675381
- Kehinde Adedulu, NPFamily Nurse Practitioner1821856642
- Biplov AdhikariStudent in an Organized Health Care Education/Training Program1780256800
- Yehudah Adler, PMHNPPsychiatric/Mental Health Nurse Practitioner1750124210
- Anup AgarwalInternal Medicine Physician1366844722
- Moses Agbonavbare, PA-CSurgical Physician Assistant1578225439
Verify Calvin Thomas Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0081038Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average infectious disease physician in 2024
728 Medicare Part D claims for 98 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 70% of claims.
Most prescribed
- Biktarvy188 claims
- Genvoya96 claims
- Odefsey57 claims
- Triumeq51 claims
- Tivicay27 claims
- Cephalexin21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Medstar Medical Group II LLCBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Calvin Thomas Williams among 410 infectious disease physician records in Maryland
Calvin Thomas Williams, M.D. / PH.D is one of 410 infectious disease physician records with a practice address in Maryland. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 74% of them.
- NPI issued2011 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated2011 · median 2002 among the 202 with a school on file
- Record last updated2018 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Maryland
There are 410 infectious disease physician records in Maryland.
All 410 in Maryland → Every provider in Baltimore → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Alexander Chen, MDBaltimore, MD 212181699753889
- Paul Eder, M.D.Baltimore, MD 212181366401515
- Samuel Holzman, MD, SCMBaltimore, MD 212181568725455
- Elana Rosenthal, M.D.Baltimore, MD 212181679893390
- Dolph Druckman, MD, MPHBaltimore, MD 212171477746956
- John Cmar, MDBaltimore, MD 212151669583837
- Jeremy Gradon, M.D.Baltimore, MD 212151124078340
- Andrew Mayrer, M.D.Baltimore, MD 212151245278795
Common questions
What is Calvin Thomas Williams, M.D. / PH.D's NPI number?
Calvin Thomas Williams, M.D. / PH.D's National Provider Identifier (NPI) is 1023308640, issued on Apr 15, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Calvin Thomas Williams, M.D. / PH.D located?
The NPPES record lists a practice address at 201 E University Pkwy, Baltimore, MD, 21218. Phone: (443) 474-9911. Providers update this record themselves, so call before visiting.
How can I verify Calvin Thomas Williams, M.D. / PH.D's license?
NPPES lists Maryland license number D0081038, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Calvin Thomas Williams, M.D. / PH.D prescribe under Medicare Part D?
In 2024, Calvin Thomas Williams, M.D. / PH.D had 728 Medicare Part D claims for 98 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Calvin Thomas Williams, M.D. / PH.D's MIPS final score?
The 2023 MIPS final score is 80.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.