Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Philip Andrew Knorr, M.D.

Urology Physician in Freedom, CA · enumerated 2006.

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

National Provider Identifier

1801981485

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Registry record

Entity type Individual (Type 1)

Name Dr. Philip Andrew Knorr

Credential M.D.

Sex Male

Practice address 160 Green Valley Rd, Suite 203, Freedom, CA, 95019

Phone (831) 728-4227

Fax (831) 728-0410

Enumeration date Oct 3, 2006

Last updated in NPPES Feb 21, 2020

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License G56315 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1437599032	Medicaid	CA	-

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Philip Knorr?

Philip Knorr is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-21.