Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM J COLLINS MD
NPI 1104892074
Internal Medicine - Gastroenterology in Orange, CA

Q: What is William Collins's NPI number?

The NPI number for William Collins is 1104892074. It was assigned to this individual provider in the NPPES registry on February 28, 2006.

Q: What is William Collins's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for William Collins was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 28, 2006

1201 W LA VETA AVE, SUITE 211, ORANGE, CA 92868(714) 639-3363(714) 532-3460 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About William J Collins Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM J COLLINS MD (NPI 1104892074) is an individual gastroenterology provider in Orange, California, licensed in California (C33697) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1104892074

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameWILLIAM J COLLINSCredential: MD

Location Address1201 W LA VETA AVE, SUITE 211Orange, CA 92868-4213

Mailing Address1201 W La Veta Ave, Suite 211Orange, CA 92868-4213 · (714) 639-3363 · Fax (714) 532-3460

Phone(714) 639-3363

Fax(714) 532-3460

Sole ProprietorNo

Enumeration DateFebruary 28, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1104892074 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · C33697

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

1201 W LA VETA AVE, Orange, CA 92868

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Other Identifiers 1

Medicaid0C3369700CA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TRISHA JACKSON

Social Worker

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (714) 509-8521

CHILDREN'S HOSPITAL OF ORANGE COUNTY

Neurological Surgery

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (714) 509-8649

JULIAN THOMAS MD

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (714) 509-7601

DR. GEOFFREY CARSON CHENG MD

Pediatrics (Pediatric Hematology-Oncology)

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (714) 509-8636

BRIANNA JOY LEYDEN

Student in an Organized Health Care Education/Training Program

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (714) 997-3000

DR. MARNI CARMELA SWITKIN NAGEL PH.D.

Psychologist (Clinical Child & Adolescent)

1201 W LA VETA AVE, 503
ORANGE, CA 92868

Orange County (714) 532-8481

DR. DAINA DREIMANE MD

Pediatrics (Pediatric Endocrinology)

1201 W LA VETA AVE
ORANGE, CA 92868

Orange County (888) 770-2462

DR. SHARIEF KHALIL TARAMAN M.D.

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

1201 W LA VETA AVE, CHILDREN'S HOSPITAL OF ORANGE COUNTY, NEUROLOGY
ORANGE, CA 92868

Orange County (714) 509-7601

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Collins's NPI number?

The NPI number for William Collins is 1104892074. It was assigned to this individual provider in the NPPES registry on February 28, 2006.

Where is William Collins located?

William Collins practices at 1201 W La Veta Ave Suite 211, Orange, CA 92868. The listed phone number is (714) 639-3363.

What is William Collins's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for William Collins was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.