GARY J BIRNBAUM MD
NPI 1912055807
Family Medicine - Geriatric Medicine in San Diego, CA

Q: What is Gary Birnbaum's NPI number?

The NPI number for Gary Birnbaum is 1912055807. It was assigned to this individual provider in the NPPES registry on January 8, 2007.

Q: What is Gary Birnbaum's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Geriatric Medicine, with taxonomy code 207QG0300X.

Q: When was this NPI record last updated?

The NPPES record for Gary Birnbaum was last updated on November 22, 2021. 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.

Active since January 08, 2007PECOS Enrolled

4647 ZION AVE, SAN DIEGO, CA 92120(619) 528-5000 Get Directions Write a Review

NPPES record last updated: November 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Gary J Birnbaum Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GARY J BIRNBAUM MD (NPI 1912055807) is an individual geriatric medicine provider in San Diego, California, licensed in California (G46249) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912055807

Entity TypeIndividualMale

Primary Taxonomy207QG0300X

Provider Legal NameGARY J BIRNBAUMCredential: MD

Location Address4647 ZION AVESan Diego, CA 92120-2507

Mailing Address4647 Zion AveSan Diego, CA 92120-2507 · (619) 528-5000

Phone(619) 528-5000

Sole ProprietorNo

Enumeration DateJanuary 8, 2007

Last NPPES UpdateNovember 22, 2021

✔ NPI 1912055807 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207QG0300X

License✔ Licensed in CA · G46249

Definition

A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital.

4647 ZION AVE, San Diego, CA 92120

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gary J Birnbaum Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gary Birnbaum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group

Same address

Health Maintenance Organization

4647 ZION AVE
San Diego, CA 92120

Reassigned Medicare billing, California enrollment
13,921 clinicians in this Medicare group

NPI 1225060742 (619) 528-5000

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 92120 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$108.42 typical visit price

range $20.62 – $151.42

Typical copayment $27.10 (range $5.15 – $37.85)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Ostomy skin barrier, powder, per oz A4371

DME-Orthotic Devices · category DF010N

1 supplier13 claims13 services$2.94 avg. paid by Medicare

Ostomy pouch, urinary; for use on barrier with non-locking flange, with faucet-type tap with valve (2 piece), each A4432

DME-Orthotic Devices · category DF010N

1 supplier13 claims195 services$3.20 avg. paid by Medicare

Skin barrier, wipes or swabs, each A5120

DME-Orthotic Devices · category DF010N

1 supplier13 claims325 services$0.21 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

ANN MARIE PENA MD

Obstetrics & Gynecology

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 528-5000

DR. SHWETA WARNER M.D.

Internal Medicine (Infectious Disease)

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 221-6258

DR. MATTHEW JAMES ROOSEVELT M.D.

Internal Medicine

4647 ZION AVE, DEPARTMENT OF HOSPITAL MEDICINE
SAN DIEGO, CA 92120

San Diego County (619) 952-5091

RICHARD FUNG

Pharmacist

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (626) 278-2749

ARDIS L TASCHNER CRNA

Nurse Anesthetist, Certified Registered

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 528-5000

JEANNE HAGER DONAHUE LCSW

Social Worker (Clinical)

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 528-5323

DAVID M. LEVINE MD

Internal Medicine (Pulmonary Disease)

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 528-5000

DALE K. LIEU MD

Internal Medicine (Infectious Disease)

4647 ZION AVE
SAN DIEGO, CA 92120

San Diego County (619) 528-5000

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 Gary Birnbaum's NPI number?

The NPI number for Gary Birnbaum is 1912055807. It was assigned to this individual provider in the NPPES registry on January 8, 2007.

Where is Gary Birnbaum located?

Gary Birnbaum practices at 4647 Zion Ave, San Diego, CA 92120. The listed phone number is (619) 528-5000.

What is Gary Birnbaum's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Geriatric Medicine, with taxonomy code 207QG0300X.

Is Gary Birnbaum enrolled in Medicare?

Yes. Gary Birnbaum is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gary Birnbaum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Birnbaum reassigns Medicare benefits to Southern California Permanente Medical Group (San Diego, CA). The 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 Gary Birnbaum'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 Gary Birnbaum was last updated on November 22, 2021. 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.