Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph C Preston, M.D.

Critical Care Medicine (Internal Medicine) Physician in Orange, CA · enumerated 2006.

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

National Provider Identifier

1457329674

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Registry record

Entity type Individual (Type 1)

Name Joseph C Preston

Credential M.D.

Sex Male

Practice address 1010 W La Veta Ave Ste 750, Orange, CA, 92868

Phone (714) 361-6600

Fax (714) 919-8804

Enumeration date Mar 14, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License G80997 (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
110198149	Other	CA	RAIL ROAD MEDICARE - PROVIDER PTAN
W1514	Other	CA	MEDICARE PTAN - TYPE 2
1912919804	Other	-	NPI - TYPE 2
1912919804	Medicaid	CA	-
CG5665	Other	CA	RAIL ROAD MEDICARE - GROUP PTAN

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 specialty is Joseph Preston?

Joseph Preston is registered in NPPES with the primary taxonomy of Critical Care Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Peter Fotinakes Sleep Medicine (Internal Medicine) Physician · Orange, CA NPI 1679542518 Tackson Tam Internal Medicine Physician · Orange, CA NPI 1548239635 Sarah Mosko Clinical Psychologist · Orange, CA NPI 1992774491 Stephen Loughran Family Nurse Practitioner · Orange, CA NPI 1801865308 Reza Mina-Araghi Critical Care Medicine (Internal Medicine) Physician · Orange, CA NPI 1699785279 Pulmonary Consultants & Primary Care Physicians Medical Group, Inc. Pulmonary Disease Physician · Orange, CA NPI 1912919804 Shahid Hayat Critical Care Medicine (Internal Medicine) Physician · Orange, CA NPI 1316047913 James Roum Critical Care Medicine (Internal Medicine) Physician · Orange, CA NPI 1477633626

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.