Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Timothy A Brieske, M.D.

Family Medicine Physician in Oceanside, CA · enumerated 2005.

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

National Provider Identifier

1013919455

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Registry record

Entity type Individual (Type 1)

Name Timothy A Brieske

Credential M.D.

Sex Male

Practice address Oceanside, CA, 92056

Phone (760) 940-5606

Fax (760) 940-4007

Enumeration date Aug 15, 2005

Last updated in NPPES Aug 21, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 43799 (WI) 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
080181680	Other	WI	RAILROAD MEDICARE
34140600	Medicaid	WI	-
2104038	Other	WI	FIRST HEALTH
13046	Other	WI	DEAN HEALTH PLAN
78B99BR	Other	WI	ATRIUM COMMERCIAL
39092953812	Other	WI	UNITY - ELROY CLINIC
1038473	Other	WI	PHYSICIANS PLUS
2004	Other	WI	MMSI
39092953815	Other	WI	UNITY - HILLSBORO CLINIC
9667272P01	Other	WI	CIGNA
HP67021	Other	WI	HEALTH PARTNERS

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 Timothy Brieske?

Timothy Brieske is registered in NPPES with the primary taxonomy of Family Medicine 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 2018-08-21.