Walter C. Prehn M.d. A Professional Corporation - Primary Care in Sonoma, CA

Walter C. Prehn M.d. A Professional Corporation is a primary clinic (Internal Medicine) in Sonoma, California. The current practice location for Walter C. Prehn M.d. A Professional Corporation is 181 Andrieux St, Suite 206, Sonoma, California. For appointments, you can reach them via phone at (707) 495-7762. The mailing address for Walter C. Prehn M.d. A Professional Corporation is 181 Andrieux St, Suite 206, Sonoma, California and phone number is (707) 495-7762.

Walter C. Prehn M.d. A Professional Corporation is licensed to practice in California (license number G25454) and its NPI number is 1306143169. This medical practice does not participate in medicare program and thus may not accept your medicare insurance. You may check if they accept your insurance at (707) 495-7762.

Contact Information

Walter C. Prehn M.d. A Professional Corporation
181 Andrieux St
Suite 206
Sonoma
CA 95476-6920
(707) 495-7762
(707) 938-7337

Map and Direction


Primary Care Clinic Profile

Full NameWalter C. Prehn M.d. A Professional Corporation
SpecialityInternal Medicine
Location181 Andrieux St, Sonoma, California
Authorized Official Name and PositionWalter Craig Prehn (PRESIDENT)
Authorized Official Contact7074957762
Accepts Medicare InsuranceThis clinic does not participate in Medicare Program.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Walter C. Prehn M.d. A Professional Corporation
181 Andrieux St
Suite 206
Sonoma
CA 95476-6920

Ph: (707) 495-7762
Walter C. Prehn M.d. A Professional Corporation
181 Andrieux St
Suite 206
Sonoma
CA 95476-6920

Ph: (707) 495-7762

NPI Details:

NPI Number1306143169
Provider Enumeration Date02/14/2011
Last Update Date10/05/2012

Medical Identifiers

Medical identifiers for Walter C. Prehn M.d. A Professional Corporation such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1306143169NPI-NPPES
00G254540MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G25454 (California)Primary

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.