GERARD OLIVIER MATHELIER M.D.
NPI 1497149686
Anesthesiology in Baltimore, MD
About Gerard Olivier Mathelier M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GERARD OLIVIER MATHELIER M.D. (NPI 1497149686) is an individual anesthesiology provider in Baltimore, Maryland, licensed in Maryland (D0089501) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Bayview Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gerard Olivier Mathelier M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Gerard Mathelier reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Germantown, MD 20876
- Reassigned Medicare billing, District of Columbia enrollment
- 68 clinicians in this Medicare group
Prince Frederick, MD 20678
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 196 clinicians in this Medicare group
Woodbridge, VA 22191
- Reassigned Medicare billing, Virginia enrollment
- 170 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins Bayview Medical Center
Acute Care Hospitals · Baltimore, MDMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gerard Mathelier's NPI number?
The NPI number for Gerard Mathelier is 1497149686. It was assigned to this individual provider in the NPPES registry on March 25, 2015.
Where is Gerard Mathelier located?
Gerard Mathelier practices at 4940 Eastern Ave, Baltimore, MD 21224. The listed phone number is (410) 550-0942.
What is Gerard Mathelier's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Gerard Mathelier enrolled in Medicare?
Yes. Gerard Mathelier is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gerard Mathelier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gerard Mathelier reassigns Medicare benefits to 4 organizations: Johns Hopkins University (Baltimore, MD), Capitol Anesthesia Associates, Ltd (Germantown, MD), North American Partners In Anesthesia Maryland LLC (Prince Frederick, MD) and Premier Anesthesia Of Virginia LLC (Woodbridge, VA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gerard Mathelier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gerard Mathelier affiliated with any hospitals?
According to CMS data, Gerard Mathelier is affiliated with Johns Hopkins Bayview Medical Center.
When was this NPI record last updated?
The NPPES record for Gerard Mathelier was last updated on July 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Gerard Olivier Mathelier, M.D. · NPI 1497149686
Anesthesiology physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 25, 2015.
## Identity
- **NPI:** 1497149686 (Entity type: Individual)
- **Enumerated:** March 25, 2015
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** D0089501 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 4940 EASTERN AVE, Baltimore, MD 21224-2735
- **Phone:** (410) 550-0942 · **Fax:** (410) 550-0443
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1306810619, Baltimore, MD); Capitol Anesthesia Associates, Ltd (NPI 1194106955, Germantown, MD); North American Partners In Anesthesia Maryland LLC (NPI 1093707879, Prince Frederick, MD); Premier Anesthesia Of Virginia LLC (NPI 1255986147, Woodbridge, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** July 7, 2021
- **Other identifiers:** Medicaid 1497149686 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1497149686) · Data from the CMS NPPES public registry.