Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peter V. Madill, M.D. A Medical Corporation

Family Medicine Physician in Sebastopol, CA · enumerated 2006 · authorized official Peter Madill, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1134133085

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Registry record

Entity type Organization (Type 2)

Legal business name Peter V. Madill, M.D. A Medical Corporation

Practice address 1020 Gravenstein Hwy. So., Suite 120, Sebastopol, CA, 95472

Phone (707) 823-3312

Fax (707) 823-4901

Enumeration date Jul 28, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A31200 (CA) Primary

Authorized official

Name Peter Madill

Title President

Phone (707) 823-3312

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Peter V. Madill, M.D. A Medical Corporation?

Peter V. Madill, M.D. A Medical Corporation is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.