DR. RONALD O'HALLORAN M.D.
NPI 1841357647
Pathology - Anatomic Pathology in Ventura, CA

Q: What is Ronald O'halloran's NPI number?

The NPI number for Ronald O'halloran is 1841357647. It was assigned to this individual provider in the NPPES registry on January 2, 2007.

Q: What is Ronald O'halloran's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology, with taxonomy code 207ZP0101X.

Q: When was this NPI record last updated?

The NPPES record for Ronald O'halloran was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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 January 02, 2007

3291 LOMA VISTA RD, VENTURA, CA 93003(805) 652-6556(805) 652-6286 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Ronald O'halloran M.d. NPPES

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

DR. RONALD O'HALLORAN M.D. (NPI 1841357647) is an individual anatomic pathology provider in Ventura, California, licensed in California (G38167) and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1841357647

Entity TypeIndividualMale

Primary Taxonomy207ZP0101X

Provider Legal NameDR. RONALD O'HALLORANCredential: M.D.

Location Address3291 LOMA VISTA RDVentura, CA 93003-3099

Mailing Address3291 Loma Vista RdVentura, CA 93003-3099 · (805) 652-6556 · Fax (805) 652-6286

Phone(805) 652-6556

Fax(805) 652-6286

Sole ProprietorNo

Enumeration DateJanuary 2, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1841357647 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0101X

License✔ Licensed in CA · G38167

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

3291 LOMA VISTA RD, Ventura, CA 93003

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Other Identifiers 1

Medicare UPINE82977CA

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.

ANNA MIKHAILOVSKY M.D.

Family Medicine

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6228

DR. BRAD S ADLER M.D.

Pathology (Anatomic Pathology)

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6000

DR. RAMON GOMEZ M.D.

Family Medicine

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6556

FRANCES O'SULLIVAN

Psychiatry & Neurology (Psychiatry)

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6556

DR. MARISA SPORTELLI M.D.

Family Medicine

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6556

DR. STEPHANUS R PHILIP MD

Hospitalist

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 652-6075

MS. EUGENIA S H PANG OTRL

Occupational Therapist

3291 LOMA VISTA RD, VENTURA COUNTY MEDICAL CENTER
VENTURA, CA 93003

Ventura County (805) 648-9980

DR. KEVIN ANDREW BARKLEY M.D.

Anesthesiology

3291 LOMA VISTA RD
VENTURA, CA 93003

Ventura County (805) 642-8565

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 Ronald O'halloran's NPI number?

The NPI number for Ronald O'halloran is 1841357647. It was assigned to this individual provider in the NPPES registry on January 2, 2007.

Where is Ronald O'halloran located?

Ronald O'halloran practices at 3291 Loma Vista Rd, Ventura, CA 93003. The listed phone number is (805) 652-6556.

What is Ronald O'halloran's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology, with taxonomy code 207ZP0101X.

When was this NPI record last updated?

The NPPES record for Ronald O'halloran was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.