JOHANNA ELIZABETH GERWER MD, MPH
NPI 1043742588
Internal Medicine - Endocrinology, Diabetes & Metabolism in San Diego, CA
About Johanna Elizabeth Gerwer Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHANNA ELIZABETH GERWER MD, MPH (NPI 1043742588) is an individual endocrinology, diabetes & metabolism provider in San Diego, California, licensed in California (A169752) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS and is a graduate of Texas Tech University Health Science Center School Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses
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
Johanna Elizabeth Gerwer Md, Mph 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
2Medicare enrollment records show Johanna Gerwer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92113
- Reassigned Medicare billing, California enrollment
- 1,100 clinicians in this Medicare group
San Diego, CA 92108
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92113 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 92113
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 Johanna Gerwer's NPI number?
The NPI number for Johanna Gerwer is 1043742588. It was assigned to this individual provider in the NPPES registry on April 3, 2017.
Where is Johanna Gerwer located?
Johanna Gerwer practices at 1809 National Ave, San Diego, CA 92113. The listed phone number is (619) 515-2300.
What is Johanna Gerwer's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Johanna Gerwer enrolled in Medicare?
Yes. Johanna Gerwer 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 Johanna Gerwer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Johanna Gerwer reassigns Medicare benefits to 2 organizations: Family Health Centers Of San Diego Inc (San Diego, CA) and Southern California Permanente Medical Group (San Diego, CA). 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 Johanna Gerwer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Johanna Gerwer was last updated on September 13, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Johanna Elizabeth Gerwer, MD, MPH · NPI 1043742588
Endocrinology, Diabetes & Metabolism physician in San Diego, California. Individual provider, active in the CMS NPPES registry since April 3, 2017.
## Identity
- **NPI:** 1043742588 (Entity type: Individual)
- **Enumerated:** April 3, 2017
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** A169752 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1809 NATIONAL AVE, San Diego, CA 92113-2113
- **Phone:** (619) 515-2300
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Family Health Centers Of San Diego Inc (NPI 1528331287, San Diego, CA); Southern California Permanente Medical Group (NPI 1023425972, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Texas Tech University Health Science Center School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** September 13, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1043742588) · Data from the CMS NPPES public registry.