Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Gerard Olivier Mathelier, MD

Individual provider Anesthesiology Physician · NPI 1497149686

Gerard Olivier Mathelier, MD practises Anesthesiology in Baltimore, Maryland. Qualified in 2015, 11 years ago. Practices with Johns Hopkins University, a 2,855-clinician group and works from 3 locations. Licensed in Florida and Maryland.

Years since qualifying
11
Licensed in
FL, MD
In the registry since
2015
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

4940 Eastern Ave
Baltimore, MD 21224-2735
Phone: (410) 550-0942
Fax: (410) 550-0443
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 500 Winderley Pl Ste 115, Maitland, FL 32751-7406 — (407) 581-9180
  • 5530 Wisconsin Ave, Chevy Chase, MD 20815-4404 — (301) 718-9800

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence D0089501 (MD)
Anesthesiology Physician Taxonomy 207L00000X · Licence ME140158 (FL)

Record details

NPI number1497149686
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 25, 2015
Last updated in NPPESJuly 7, 2021
Certification dateJuly 7, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Johns Hopkins University — 2855 clinicians
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients219
Services billed 231 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Johns Hopkins University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2855 clinicians in the practice; 12 are shown here.

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