Mark Clifford Olesen, MD
Preventive Medicine/Occupational Environmental Medicine Physician · Behtesda, MD
Mark Clifford Olesen, MD is a preventive medicine/occupational environmental medicine physician with a practice address in Behtesda, Maryland, and NPI 1558363184, issued on Aug 12, 2005. Check the license on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Clifford Olesen
- Credential
- MD
- Primary taxonomy
- Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
- License number
- GFE53142 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8901 Wisconsin Avenue, Behtesda, MD 20889
- Phone
- (301) 295-2427
- Enumerated
- Aug 12, 2005
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest preventive medicine/occupational environmental medicine physician records → All 36 in Maryland → Look up another NPI →
Also registered at 8901 Wisconsin Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dorothea Dobson, MDAnesthesiology Physician1972599769
Verify Mark Clifford Olesen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Clifford Olesen among 36 preventive medicine/occupational environmental medicine physician records in Maryland
Mark Clifford Olesen, MD is one of 36 preventive medicine/occupational environmental medicine physician records with a practice address in Maryland. 11% 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileNo · 11% of these records are
- In the CMS Doctors and Clinicians fileNo · 6% of these records are
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0500X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Preventive Medicine/Occupational Environmental Medicine Physician providers in Maryland
There are 36 preventive medicine/occupational environmental medicine physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 36 in Maryland → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →
The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes
- Robert Ball, MDBethesda, MD 208891114089117
- Maura Emerson, M.D.Bethesda, MD 208891518031624
- Alyson KilBethesda, MD 208891710304803
- Michael Meier, MD, MPHBethesda, MD 208891184627523
- Teshome Tafes, D.OBethesda, MD 208891013299106
- Kevin Taylor, MD, MTM&HBethesda, MD 208891356534564
- Janet Fujikawa, D.O.Gaithersburg, MD 208791730335258
- Stephanie Smith, D.O.Silver Spring, MD 209011871840249
Common questions
What is Mark Clifford Olesen, MD's NPI number?
Mark Clifford Olesen, MD's National Provider Identifier (NPI) is 1558363184, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Clifford Olesen, MD located?
The NPPES record lists a practice address at 8901 Wisconsin Avenue, Behtesda, MD, 20889. Phone: (301) 295-2427. Providers update this record themselves, so call before visiting.
How can I verify Mark Clifford Olesen, MD's license?
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.
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.