TIMOTHY M SOWERBY MD
NPI 1063475952
Internal Medicine - Gastroenterology in Petaluma, CA

Q: What is Timothy Sowerby's NPI number?

The NPI number for Timothy Sowerby is 1063475952. It was assigned to this individual provider in the NPPES registry on April 11, 2006.

Q: What is Timothy Sowerby's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Sowerby was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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 April 11, 2006PECOS Enrolled

3900 LAKEVILLE HWY, PETALUMA, CA 94954(707) 765-3900 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Timothy M Sowerby Md NPPES

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

TIMOTHY M SOWERBY MD (NPI 1063475952) is an individual gastroenterology provider in Petaluma, California, licensed in California (A50116) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063475952

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameTIMOTHY M SOWERBYCredential: MD

Location Address3900 LAKEVILLE HWYPetaluma, CA 94954-5698

Mailing Address3900 Lakeville HwyPetaluma, CA 94954-5698 · (707) 765-3900

Phone(707) 765-3900

Sole ProprietorNo

Enumeration DateApril 11, 2006

Last NPPES UpdateJanuary 15, 2026

NPPES CertifiedJanuary 15, 2026

✔ NPI 1063475952 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in CA · A50116✔ Licensed in CA · A050116

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

3900 LAKEVILLE HWY, Petaluma, CA 94954

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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)

Timothy M Sowerby 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 94954 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

$142.00 typical visit price

range $63.04 – $187.01

Typical copayment $35.50 (range $15.76 – $46.75)

Most-billed visit code 99204

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.

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.

DANIEL G WHITE MD

Family Medicine

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3900

DR. ALEKSEY ZAKINOV

Family Medicine

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3960

DAN SCHLAGER MD

Emergency Medicine

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3900

PEGGY LOUISE VANPATTEN M.S.

Audiologist

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3516

DR. LINDSEY HIBBARD M.D.

Pediatrics

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3920

MS. LYDIA E ESTEVEZ P,T.

Physical Therapist

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3628

ROBERT M. CARRIGER M.F.T.

Marriage & Family Therapist

3900 LAKEVILLE HWY, KAISER PERMANENTE
PETALUMA, CA 94954

Sonoma County (707) 765-3586

DIANE M. MURRAY MD

Physical Medicine & Rehabilitation

3900 LAKEVILLE HWY
PETALUMA, CA 94954

Sonoma County (707) 765-3900

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 Timothy Sowerby's NPI number?

The NPI number for Timothy Sowerby is 1063475952. It was assigned to this individual provider in the NPPES registry on April 11, 2006.

Where is Timothy Sowerby located?

Timothy Sowerby practices at 3900 Lakeville Hwy, Petaluma, CA 94954. The listed phone number is (707) 765-3900.

What is Timothy Sowerby's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Timothy Sowerby enrolled in Medicare?

Yes. Timothy Sowerby is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Timothy Sowerby was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.