ORANGE COUNTY EAR, NOSE & THROAT
NPI 1205924511
Specialist in Irvine, CA

Q: What is Orange County Ear, Nose & Throat's NPI number?

The NPI number for Orange County Ear, Nose & Throat is 1205924511. It was assigned to this organization in the NPPES registry on October 11, 2006. The provider was formerly known as Enta.

Q: What is Orange County Ear, Nose & Throat's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Active since October 11, 2006

22 ODYSSEY STE 100, IRVINE, CA 92618(949) 679-9000(949) 679-9001 Get Directions Write a Review

NPPES record last updated: September 22, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 22, 2022, Sep 16, 2022, Aug 16, 2019 (3 updates tracked since 2019).

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About Orange County Ear, Nose & Throat NPPES

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

ORANGE COUNTY EAR, NOSE & THROAT (NPI 1205924511), doing business as Enta, is a healthcare organization registered as a specialist in Irvine, California and active in the NPI registry since October 2006. The organization maintains a secondary practice location in Laguna Hills and lists Michelle Crystal Dena, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1205924511

Entity TypeOrganization

Primary Taxonomy174400000X

Legal Business NameORANGE COUNTY EAR, NOSE & THROAT

Location Address22 ODYSSEY STE 100Irvine, CA 92618-3186

Mailing Address24411 Health Center Drive, Suite 600Laguna Hills, CA 92653 · (949) 305-8000 · Fax (949) 305-8001

Phone(949) 679-9000

Fax(949) 679-9001

Organization SubpartNo

Authorized OfficialMichelle Crystal DenaOffice Manager · (949) 305-8252

Enumeration DateOctober 11, 2006

Last NPPES UpdateSeptember 22, 20223 updates tracked since enumeration

NPPES CertifiedSeptember 22, 2022

✔ NPI 1205924511 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

22 ODYSSEY STE 100, Irvine, CA 92618

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Other Names 1

Former Legal Business NameEnta

Secondary Practice Location 1

Location 124411 Health Center Dr Ste 600Laguna Hills, CA 92653-3687 · Phone (949) 305-8000 · Fax (949) 305-8001

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Orange County Ear, Nose & Throat is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 3 clinicians reassign Medicare billing to Orange County Ear, Nose & Throat, which bills Medicare for the services they deliver. Of these, 3 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

John Sun, M.D.

Otolaryngology

NPI 1578664025

24411 HEALTH CENTER DR STE 600
Laguna Hills, CA 92653

(949) 305-8000

✔ PECOS✔ Accepts Medicare5.1 mi

Paul Sun, M.D.

Otolaryngology

NPI 1861599193

24411 HEALTH CENTER DR STE 600
Laguna Hills, CA 92653

(949) 305-8000

✔ PECOS✔ Accepts Medicare5.1 mi

Christopher Yian, M.D.

Otolaryngology

NPI 1003913336

24411 HEALTH CENTER DR STE 600
Laguna Hills, CA 92653

(949) 305-8000

✔ PECOS✔ Accepts Medicare5.1 mi

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 Orange County Ear, Nose & Throat's NPI number?

The NPI number for Orange County Ear, Nose & Throat is 1205924511. It was assigned to this organization in the NPPES registry on October 11, 2006. The provider was formerly known as Enta.

Where is Orange County Ear, Nose & Throat located?

Orange County Ear, Nose & Throat is located at 22 Odyssey Ste 100, Irvine, CA 92618. The listed phone number is (949) 679-9000.

What is Orange County Ear, Nose & Throat's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Orange County Ear, Nose & Throat enrolled in Medicare?

Yes. Orange County Ear, Nose & Throat is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Orange County Ear, Nose & Throat?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Otolaryngology, reassign their Medicare billing to Orange County Ear, Nose & Throat. 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, 3 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Orange County Ear, Nose & Throat was last updated on September 22, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.