Mark Olesen, MD
NPI 1558363184 · Preventive Medicine/Occupational Environmental Medicine Physician · Behtesda, MD
Enrolled with Medicare as Order and Referring Only - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Olesen, MD is a Preventive Medicine/Occupational Environmental Medicine Physician provider in Behtesda, MD (NPI 1558363184).
Provider details
- NPI number
- 1558363184
- Entity type
- Individual
- Primary specialty
- Preventive Medicine/Occupational Environmental Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- GFE53142 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-12
- Last updated
- 2025-09-11
Frequently asked questions
- What is Mark Olesen's NPI number?
- Mark Olesen's National Provider Identifier (NPI) is 1558363184, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Olesen's specialty?
- Mark Olesen is listed in the NPPES registry with a primary specialty of Preventive Medicine/Occupational Environmental Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Olesen located?
- Mark Olesen's practice location on file with NPPES is 8901 Wisconsin Avenue, Behtesda, MD 20889-5600.
- What is Mark Olesen's phone number?
- The practice phone number listed in the NPPES registry for Mark Olesen is (301) 295-2427.
- Does Mark Olesen accept Medicare?
- Mark Olesen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Olesen's NPI active?
- Yes — Mark Olesen's NPI (1558363184) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.