Thomas Frederick Withuhn, M.D., M.S.
Internal Medicine Physician · Owings Mills, MD
Thomas Frederick Withuhn, M.D., M.S. is an internal medicine physician with a practice address in Owings Mills, Maryland, and NPI 1821264425, issued on May 2, 2008. Check the license (Maryland D80017, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Thomas Frederick Withuhn
- Credential
- M.D., M.S.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- D80017 MD
23614 WV
Self-reported in NPPES; status is on the state search - Practice location
- 10084 Reisterstown RD Ste 200A, Owings Mills, MD 21117
- Phone
- (410) 552-5050
- Enumerated
- May 2, 2008
- Record last updated
- Mar 9, 2022
- Fax
- (410) 552-0200
- Medicare enrollment
- Enrolled (PECOS I20151028002493); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 10084 Reisterstown RD Ste 200A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Irvin Sahm, CRNPAdult Health Nurse Practitioner1356978530
- Donnell James, P.A.Physician Assistant1407163439
- Jill Koeppen, NPFamily Nurse Practitioner1427042027
- Mariah Muse, CRNPFamily Nurse Practitioner1265027700
- Robert Rotenberg, PAPhysician Assistant1144685207
Verify Thomas Frederick Withuhn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D80017Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average internal medicine physician in 2024
5,134 Medicare Part D claims for 399 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 158 claims were for opioids.
Most prescribed
- Atorvastatin Calcium220 claims
- Rosuvastatin Calcium188 claims
- Amlodipine Besylate186 claims
- Levothyroxine Sodium147 claims
- Lisinopril133 claims
- Metformin Hcl128 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.
Industry payments in 2024: $2,442.07
131 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Agape Physical Therapy And Sports Rehabilitation LPForest Hill, MD
- Lifebridge Community Physicians IncWestminster, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Frederick Withuhn among 3,904 internal medicine physician records in Maryland
Thomas Frederick Withuhn, M.D., M.S. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% 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 56% of them.
- NPI issued2008 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · median 2003 among the 2,445 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 internal medicine physician records list a practice address in Owings Mills
They are 23 of the 1,586 NPPES records with a practice address in Owings Mills, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Owings Mills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Applebaum, M.D.Owings Mills, MD 211171053380816
- Shelley Cabbell, M.D.Owings Mills, MD 211171821053877
- Eric Carr, M.D.Owings Mills, MD 211171093737447
- Pankaj Desai, M.D., FACPOwings Mills, MD 211171194790105
- Royce Fagan, M.D.Owings Mills, MD 211171407814486
- Jeanne Fitzgibbon, CRNPOwings Mills, MD 211171669585949
- Elena Ghiaur, MDOwings Mills, MD 211171942227871
- Ellie Goldbloom, M.D.Owings Mills, MD 211171437135092
Common questions
What is Thomas Frederick Withuhn, M.D., M.S.'s NPI number?
Thomas Frederick Withuhn, M.D., M.S.'s National Provider Identifier (NPI) is 1821264425, issued on May 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Frederick Withuhn, M.D., M.S. located?
The NPPES record lists a practice address at 10084 Reisterstown RD Ste 200A, Owings Mills, MD, 21117. Phone: (410) 552-5050. Providers update this record themselves, so call before visiting.
How can I verify Thomas Frederick Withuhn, M.D., M.S.'s license?
NPPES lists Maryland license number D80017, 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 Thomas Frederick Withuhn, M.D., M.S. prescribe under Medicare Part D?
In 2024, Thomas Frederick Withuhn, M.D., M.S. had 5,134 Medicare Part D claims for 399 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.