GERARD DEMERS D.O.
NPI 1487626032
Emergency Medicine in San Diego, CA
About Gerard Demers D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GERARD DEMERS D.O. (NPI 1487626032) is an individual emergency medicine provider in San Diego, California, licensed in California (20A11662) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center - Beaver Dam (mmc-bd), and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Gerard Demers D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Gerard Demers reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92111
- Reassigned Medicare billing, California enrollment
- 1,233 clinicians in this Medicare group
Mission Viejo, CA 92691
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Beaver Dam, WI 53916
- Reassigned Medicare billing, Wisconsin enrollment
- 32 clinicians in this Medicare group
Christiansted, St. Croix, VI 00821
- Reassigned Medicare billing, U.S. Virgin Islands enrollment
- 331 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 7
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.
Marshfield Medical Center - Beaver Dam (mmc-Bd)
Acute Care Hospitals · Beaver Dam, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92134 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare 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.
SAN DIEGO, CA 92134
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 Demers's NPI number?
The NPI number for Gerard Demers is 1487626032. It was assigned to this individual provider in the NPPES registry on February 6, 2006.
Where is Gerard Demers located?
Gerard Demers practices at 34800 Bob Wilson Dr Nmcsd- Emergency Department-Suite 118, San Diego, CA 92134. The listed phone number is (619) 532-8276.
What is Gerard Demers's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Gerard Demers enrolled in Medicare?
Yes. Gerard Demers is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Gerard Demers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gerard Demers reassigns Medicare benefits to 4 organizations: Sharp Rees-Stealy Medical Group, Inc (San Diego, CA), Providence Medical Foundation (Mission Viejo, CA), Ihc Beaver Dam Emergency Physicians, LLC (Beaver Dam, WI) and Governor Juan F. Luis Hospital & Medical Center (Christiansted, St. Croix, VI). 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 Demers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gerard Demers affiliated with any hospitals?
According to CMS data, Gerard Demers is affiliated with Marshfield Medical Center - Beaver Dam (mmc-Bd).
When was this NPI record last updated?
The NPPES record for Gerard Demers was last updated on January 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 Demers, D.O. · NPI 1487626032
Emergency Medicine physician in San Diego, California. Individual provider, active in the CMS NPPES registry since February 6, 2006.
## Identity
- **NPI:** 1487626032 (Entity type: Individual)
- **Enumerated:** February 6, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 20A11662 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 34800 BOB WILSON DR, NMCSD- EMERGENCY DEPARTMENT-SUITE 118, San Diego, CA 92134-1005
- **Phone:** (619) 532-8276
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **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): Sharp Rees-Stealy Medical Group, Inc (NPI 1285616177, San Diego, CA); Providence Medical Foundation (NPI 1427305960, Mission Viejo, CA); Ihc Beaver Dam Emergency Physicians, LLC (NPI 1912109836, Beaver Dam, WI); Governor Juan F. Luis Hospital & Medical Center (NPI 1972503647, Christiansted, St. Croix, VI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rowan University School Of Osteopathic Medicine, class of 1998
## Record status
- **NPPES last updated:** January 9, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1487626032) · Data from the CMS NPPES public registry.