OHARA AND ASSOCIATES A PROFESSIONAL MEDICAL CORPORATION
NPI 1558353144
Internal Medicine - Gastroenterology in Irvine, CA

Q: What is Ohara And Associates A Professional Medical Corporation's specialty?

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

Active since August 18, 2005

22 ODYSSEY, SUITE 170A, IRVINE, CA 92618(949) 654-8963 Get Directions Write a Review

NPPES record last updated: June 15, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 15, 2024, Feb 18, 2020, Jul 5, 2018 (3 updates tracked since 2018).

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About Ohara And Associates A Professional Medical Corporation NPPES

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

OHARA AND ASSOCIATES A PROFESSIONAL MEDICAL CORPORATION (NPI 1558353144) is a healthcare organization registered as a gastroenterology in Irvine, California and active in the NPI registry since August 2005. The organization lists Jun-ichi Ohara, Owner, as its authorized official.

NPPES Registry Identity

NPI1558353144

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameOHARA AND ASSOCIATES A PROFESSIONAL MEDICAL CORPORATION

Location Address22 ODYSSEY, SUITE 170AIrvine, CA 92618

Mailing Address22 Odyssey, Suite 170aIrvine, CA 92618-3195 · (949) 654-8963

Phone(949) 654-8963

Organization SubpartNo

Authorized OfficialJun-ichi OharaOwner · (949) 654-8963

Enumeration DateAugust 18, 2005

Last NPPES UpdateJune 15, 20243 updates tracked since enumeration

NPPES CertifiedJune 15, 2024

✔ NPI 1558353144 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

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.

Also ListedInternal MedicineTaxonomy 207R00000X

Also ListedPediatricsTaxonomy 208000000X

22 ODYSSEY, Irvine, CA 92618

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ohara And Associates A Professional Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to Ohara And Associates A Professional Medical Corporation, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Junko Ohara, MD

Internal Medicine

NPI 1609434075

22 ODYSSEY # 170-A
Irvine, CA 92618

(949) 654-8963

✔ PECOS✔ Accepts MedicareSame address

Jun Ichi Ohara, M.D., PH.D.

Internal Medicine

NPI 1578665667

22 ODYSSEY SUITE 170A
Irvine, CA 92618

(949) 654-8963

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Ohara And Associates A Professional Medical Corporation's NPI number?

The NPI number for Ohara And Associates A Professional Medical Corporation is 1558353144. It was assigned to this organization in the NPPES registry on August 18, 2005.

Where is Ohara And Associates A Professional Medical Corporation located?

Ohara And Associates A Professional Medical Corporation is located at 22 Odyssey Suite 170A, Irvine, CA 92618. The listed phone number is (949) 654-8963.

What is Ohara And Associates A Professional Medical Corporation's specialty?

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

Is Ohara And Associates A Professional Medical Corporation enrolled in Medicare?

Yes. Ohara And Associates A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Ohara And Associates A Professional Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Internal Medicine, reassign their Medicare billing to Ohara And Associates A Professional Medical Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Ohara And Associates A Professional Medical Corporation was last updated on June 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.