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

OAT SINCHAI, M.D., A PROFESSIONAL CORPORATION
NPI 1972849768
Ophthalmology in Orange, CA

Q: What is Oat Sinchai, M.D., A Professional Corporation's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Active since December 24, 2012

439 E CHAPMAN AVE, ORANGE, CA 92866(714) 769-6386(714) 769-6387 Get Directions Write a Review

NPPES record last updated: September 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 14, 2026, Sep 24, 2018, May 7, 2018 and 1 more (4 updates tracked since 2016).

On this page

About Oat Sinchai, M.d., A Professional Corporation NPPES

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

OAT SINCHAI, M.D., A PROFESSIONAL CORPORATION (NPI 1972849768) is a healthcare organization registered as an ophthalmology in Orange, California and active in the NPI registry since December 2012. The organization maintains a secondary practice location in Orange and lists Prit Oat Sinchai, Owner / Physician, as its authorized official.

NPPES Registry Identity

NPI1972849768

Entity TypeOrganization

Primary Taxonomy207W00000X

Legal Business NameOAT SINCHAI, M.D., A PROFESSIONAL CORPORATION

Location Address439 E CHAPMAN AVEOrange, CA 92866-1509

Mailing Address439 E Chapman AveOrange, CA 92866-1509 · (714) 769-6386 · Fax (714) 769-6387

Phone(714) 769-6386

Fax(714) 769-6387

Organization SubpartNo

Authorized OfficialPrit Oat SinchaiOwner / Physician · (714) 769-6386

Enumeration DateDecember 24, 2012

Last NPPES UpdateSeptember 14, 20264 updates tracked since enumeration

NPPES CertifiedSeptember 14, 2026

✔ NPI 1972849768 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in CA · A102404

Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

439 E CHAPMAN AVE, Orange, CA 92866

Open in Google Maps ↗

Secondary Practice Location 1

Location 13111 N Tustin St Ste 150Orange, CA 92865-1752 · Phone (714) 769-6386 · Fax (714) 769-6387

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)

Oat Sinchai, M.d., A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Oat Sinchai, M.D., A Professional Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Prit Sinchai, M.D.

Ophthalmology

NPI 1528191269

439 E CHAPMAN AVE
Orange, CA 92866

(714) 769-6386

✔ 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 Oat Sinchai, M.D., A Professional Corporation's NPI number?

The NPI number for Oat Sinchai, M.D., A Professional Corporation is 1972849768. It was assigned to this organization in the NPPES registry on December 24, 2012.

Where is Oat Sinchai, M.D., A Professional Corporation located?

Oat Sinchai, M.D., A Professional Corporation is located at 439 E Chapman Ave, Orange, CA 92866. The listed phone number is (714) 769-6386.

What is Oat Sinchai, M.D., A Professional Corporation's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Oat Sinchai, M.D., A Professional Corporation enrolled in Medicare?

Yes. Oat Sinchai, M.D., A Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Oat Sinchai, M.D., A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Ophthalmology) reassigns their Medicare billing to Oat Sinchai, M.D., A Professional 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Oat Sinchai, M.D., A Professional Corporation was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 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.