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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JEFFREY BRIAN WALKER M.D.
NPI 1023452042
Anesthesiology in San Diego, CA

Active since April 21, 2013PECOS EnrolledAccepts Medicare Assignment
3626 RUFFIN RD, SAN DIEGO, CA 92123(858) 565-9666(858) 565-9441 Get Directions Write a Review

NPPES record last updated: September 2, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 2, 2026, May 20, 2026, Dec 13, 2022 and 1 more (4 updates tracked since 2019).

About Dr. Jeffrey Brian Walker M.d. NPPES

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

DR. JEFFREY BRIAN WALKER M.D. (NPI 1023452042) is an individual anesthesiology provider in San Diego, California, licensed in California (A134006) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1023452042
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. JEFFREY BRIAN WALKERCredential: M.D.
Location Address3626 RUFFIN RDSan Diego, CA 92123-1810
Mailing Address3626 Ruffin RdSan Diego, CA 92123-1810 · (858) 565-9666 · Fax (858) 565-9441
Phone(858) 565-9666
Fax(858) 565-9441
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateApril 21, 2013
Last NPPES UpdateSeptember 2, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2026
✔ NPI 1023452042 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A134006
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedPreventive Medicine · Obesity MedicineTaxonomy 2083B0002X · License A134006 (CA), 2024050066 (MO)
3626 RUFFIN RD, San Diego, CA 92123
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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 and accepts Medicare assignment

Dr. Jeffrey Brian Walker M.d. 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.

PECOS PAC ID2264700731
PECOS Enrollment IDI20170626001258
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 Reassignments

2

Medicare enrollment records show Jeffrey Walker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Anesthesia Service Medical Group
Same address
Anesthesiology
3626 RUFFIN RD
San Diego, CA 92123
  • Reassigned Medicare billing, California enrollment
  • 269 clinicians in this Medicare group
NPI 1053354233 (858) 565-9666
North American Partners In Anesthesia Maryland LLC
2,295 mi
Anesthesiology
100 HOSPITAL RD
Prince Frederick, MD 20678
  • Reassigned Medicare billing, Maryland enrollment
  • 468 clinicians in this Medicare group
NPI 1093707879 (410) 535-4000

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

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.

Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand 01810
Anesthesia for procedures on the forearm, wrist, and hand involves administering medication to block sensation in these areas. This helps ensure comfort and painlessness during surgeries or treatments involving nerves, muscles, tendons, and tissue in these regions.
20 services20 patients

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.

THOMAS J. PIETUCH M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DR. JEFFREY KOJI SAKIHARA M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
MARK SETH CHRISTOFFERSON MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
QUINN S HUME DO
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
STEVEN A. SALTZ M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
TATYANA FELDMAN MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DR. JAMES BRIAN BILLYS MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DARCI J. TOM M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666

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 Jeffrey Walker's NPI number?

The NPI number for Jeffrey Walker is 1023452042. It was assigned to this individual provider in the NPPES registry on April 21, 2013.

Where is Jeffrey Walker located?

Jeffrey Walker practices at 3626 Ruffin Rd, San Diego, CA 92123. The listed phone number is (858) 565-9666.

What is Jeffrey Walker's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Jeffrey Walker enrolled in Medicare?

Yes. Jeffrey Walker 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 Jeffrey Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Walker reassigns Medicare benefits to 2 organizations: Anesthesia Service Medical Group (San Diego, CA) and North American Partners In Anesthesia Maryland LLC (Prince Frederick, MD). 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 Jeffrey Walker'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 Jeffrey Walker was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 48 days 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.