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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. KATHERINE E WALKER MD
NPI 1437101177
Family Medicine in Sonoma, CA

Active since May 17, 2006PECOS Enrolled
15000 ARNOLD DRIVE, SONOMA, CA 95431(707) 938-6556 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Katherine E Walker Md NPPES

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

DR. KATHERINE E WALKER MD (NPI 1437101177) is an individual family medicine provider in Sonoma, California, licensed in California (G69445) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437101177
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. KATHERINE E WALKERCredential: MD
Location Address15000 ARNOLD DRIVESonoma, CA 95431-1493
Mailing Address1600 9th Street, Room 205, Mailstop 2-3Sacramento, CA 95814-6414 · (916) 654-2431 · Fax (916) 654-3186
Phone(707) 938-6556
Sole ProprietorNo
Enumeration DateMay 17, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1437101177 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · G69445
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
15000 ARNOLD DRIVE, Sonoma, CA 95431
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Katherine E Walker 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95431 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
$96.16 typical visit price
range $63.04 – $187.01
Typical copayment $24.04 (range $15.76 – $46.75)
Most-billed visit code 99203
Established Patient
$109.88 typical visit price
range $21.02 – $153.40
Typical copayment $27.47 (range $5.25 – $38.35)
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.

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier12 claims360 services$5.71 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
1 supplier12 claims5,400 services$0.29 avg. paid by Medicare
Iv pole E0776
DME-Other DME · category DE000N
1 supplier12 claims12 services$8.99 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.

GERALD JOSEPH CAMARATA MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
BRIAN S PECHA MD
Internal Medicine
15000 ARNOLD DRIVE
ELDRIDGE, CA 95431
Sonoma County (707) 938-6000
DAVID SHERIDAN GRAY MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
CAROL ANNE CASTILLO MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
MS. BRENDA LEE ALBERTZ RN FNP
Nurse Practitioner
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
MICHAEL LORY WYMORE MD
Anesthesiology
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
DR. MICHAEL B LASH MD
Otolaryngology
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
DR. RONALD FREDERICK MILLER DDS
Dentist
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556

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 Katherine Walker's NPI number?

The NPI number for Katherine Walker is 1437101177. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Katherine Walker located?

Katherine Walker practices at 15000 Arnold Drive, Sonoma, CA 95431. The listed phone number is (707) 938-6556.

What is Katherine Walker's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Katherine Walker enrolled in Medicare?

Yes. Katherine Walker is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Katherine Walker was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.