Walter C Prehn, MD - Internal Medicine in Sonoma, CA

Walter C Prehn, MD is a Internal Medicine physician based in Sonoma, California. Walter C Prehn is licensed to practice in California (license number G254540) and his current practice location is 181 Andrieux Street, Suite 206, Sonoma, California. He can be reached at his office (for appointments etc.) via phone at (707) 495-7762.

NPI number for Walter C Prehn is 1225042088 and his current mailing address is 181 Andrieux Street, Suite 206, Sonoma, California. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1225042088.

Contact Information

Walter C Prehn, MD
181 Andrieux Street, Suite 206,
Sonoma, CA 95476-6920
(707) 495-7762
(707) 938-7337

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Physician's Profile

Full NameWalter C Prehn
GenderMale
SpecialityInternal Medicine
Location181 Andrieux Street, Sonoma, California
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1225042088
  • Provider Enumeration Date: 07/28/2006
  • Last Update Date: 09/25/2012

Medical Identifiers

Medical identifiers for Walter C Prehn such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1225042088NPI-NPPES
00G254540MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G254540 (California)Primary

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Walter C Prehn is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Walter C Prehn, MD
181 Andrieux Street, Suite 206,
Sonoma, CA 95476-6920

Ph: (707) 495-7762
Walter C Prehn, MD
181 Andrieux Street, Suite 206,
Sonoma, CA 95476-6920

Ph: (707) 495-7762

Reviews and Comments


Internal Medicine Doctors in Sonoma, CA

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John Gifford Boyce-smith, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 670 3rd St W, Sonoma, CA 95476
Phone: 707-938-5916    

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.

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