1. Home
  2. Directory
  3. California
  4. Sonoma
  5. Internal Medicine
  6. NPI Profile

WALTER C. PREHN M.D. A PROFESSIONAL CORPORATION
NPI 1306143169
Internal Medicine in Sonoma, CA

Active since February 14, 2011
181 ANDRIEUX ST, SUITE 206, SONOMA, CA 95476(707) 495-7762(707) 938-7337 Get Directions Write a Review

NPPES record last updated: October 5, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Walter C. Prehn M.d. A Professional Corporation NPPES

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

WALTER C. PREHN M.D. A PROFESSIONAL CORPORATION (NPI 1306143169) is a healthcare organization registered as an internal medicine in Sonoma, California and active in the NPI registry since February 2011. The organization lists Walter Craig Prehn, President, as its authorized official.

NPPES Registry Identity

NPI1306143169
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameWALTER C. PREHN M.D. A PROFESSIONAL CORPORATION
Location Address181 ANDRIEUX ST, SUITE 206Sonoma, CA 95476-6920
Mailing Address181 Andrieux St, Suite 206Sonoma, CA 95476-6920 · (707) 495-7762 · Fax (707) 938-7337
Phone(707) 495-7762
Fax(707) 938-7337
Organization SubpartNo
Authorized OfficialWalter Craig PrehnPresident · (707) 495-7762
Enumeration DateFebruary 14, 2011
Last NPPES UpdateOctober 5, 2012
✔ NPI 1306143169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G25454
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
181 ANDRIEUX ST, Sonoma, CA 95476
Open in Google Maps ↗

Other Identifiers 3

Medicare PIN00G254540CA
Medicare UPINA42674CA
Medicaid00G254540CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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.

WILLIAM RAAKA, M.D. INC.
Eyewear Supplier
181 ANDRIEUX ST, SUITE 100
SONOMA, CA 95476
Sonoma County (707) 996-1622
ROBERT K KOIDA M.D.
Family Medicine
181 ANDRIEUX ST, SUITE 201
SONOMA, CA 95476
Sonoma County (707) 938-3870
JENNIFER ANN JENSEN L.AC.
Acupuncturist
181 ANDRIEUX ST, #105
SONOMA, CA 95476
Sonoma County (707) 996-6681
NASREEN TAYMUREE
Physician Assistant
181 ANDRIEUX ST, SUITE 103
SONOMA, CA 95476
Sonoma County (707) 938-9880
MARGARET FRANCES LEISZ FNP
Nurse Practitioner (Family)
181 ANDRIEUX ST, SUITE #202
SONOMA, CA 95476
Sonoma County (707) 933-0500
DR. ELIOT ADAMS CARTER D.C.
Chiropractor
181 ANDRIEUX ST, SUITE 201
SONOMA, CA 95476
Sonoma County (707) 939-1393
DR. RICHARD LEE DAFFURN D.D.S.
Dentist
181 ANDRIEUX ST, SUITE 104
SONOMA, CA 95476
Sonoma County (707) 996-4585
ALLISON MARGARET MCKEANY MS, RD
Dietitian, Registered
181 ANDRIEUX ST, SUITE 208
SONOMA, CA 95476
Sonoma County (707) 321-4756

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 Walter C. Prehn M.D. A Professional Corporation's NPI number?

The NPI number for Walter C. Prehn M.D. A Professional Corporation is 1306143169. It was assigned to this organization in the NPPES registry on February 14, 2011.

Where is Walter C. Prehn M.D. A Professional Corporation located?

Walter C. Prehn M.D. A Professional Corporation is located at 181 Andrieux St Suite 206, Sonoma, CA 95476. The listed phone number is (707) 495-7762.

What is Walter C. Prehn M.D. A Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Walter C. Prehn M.D. A Professional Corporation was last updated on October 5, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.