OC NEUROMUSCULAR & NEUROLOGY CENTER
NPI 1639617558
Psychiatry & Neurology - Neurology in Fountain Valley, CA

Q: What is Tim T. Lai, MD, Inc.'s NPI number?

The NPI number for Tim T. Lai, MD, Inc. is 1639617558. It was assigned to this organization in the NPPES registry on February 11, 2017. The provider is doing business as Oc Neuromuscular & Neurology Center.

Q: What is Tim T. Lai, MD, Inc.'s specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Active since February 11, 2017

11100 WARNER AVE, SUITE 152, FOUNTAIN VALLEY, CA 92708(714) 486-2521(714) 486-2613 Get Directions Write a Review

NPPES record last updated: March 29, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 29, 2020, Apr 29, 2017, Feb 13, 2017 (3 updates tracked since 2017).

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About Oc Neuromuscular & Neurology Center NPPES

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

OC NEUROMUSCULAR & NEUROLOGY CENTER (NPI 1639617558) is a healthcare organization registered as a neurology in Fountain Valley, California and active in the NPI registry since February 2017. The organization lists Tim Tien Lai, President, as its authorized official.

NPPES Registry Identity

NPI1639617558

Entity TypeOrganization

Primary Taxonomy2084N0400X

Legal Business NameTIM T. LAI, MD, INC.

Location Address11100 WARNER AVE, SUITE 152Fountain Valley, CA 92708-7506

Mailing Address11100 Warner Ave, Suite 152Fountain Valley, CA 92708-7506 · (714) 486-2521 · Fax (714) 486-2613

Phone(714) 486-2521

Fax(714) 486-2613

Organization SubpartNo

Authorized OfficialTim Tien LaiPresident · (714) 486-2521

Enumeration DateFebruary 11, 2017

Last NPPES UpdateMarch 29, 20203 updates tracked since enumeration

NPPES CertifiedMarch 29, 2020

✔ NPI 1639617558 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084N0400X

License✔ Licensed in CA · A128380

Definition

A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

11100 WARNER AVE, Fountain Valley, CA 92708

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Other Names 1

Doing Business AsOc Neuromuscular & Neurology Center

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)

Oc Neuromuscular & Neurology Center 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 Oc Neuromuscular & Neurology Center, which bills Medicare for the services this clinician delivers.

Clinician (1)

Tim Lai, M.D.

Neurology

NPI 1295094324

11100 WARNER AVE STE 152
Fountain Valley, CA 92708

(714) 486-2521

✔ PECOS✔ Accepts Medicare0.1 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 Tim T. Lai, MD, Inc.'s NPI number?

The NPI number for Tim T. Lai, MD, Inc. is 1639617558. It was assigned to this organization in the NPPES registry on February 11, 2017. The provider is doing business as Oc Neuromuscular & Neurology Center.

Where is Tim T. Lai, MD, Inc. located?

Tim T. Lai, MD, Inc. is located at 11100 Warner Ave Suite 152, Fountain Valley, CA 92708. The listed phone number is (714) 486-2521.

What is Tim T. Lai, MD, Inc.'s specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Tim T. Lai, MD, Inc. enrolled in Medicare?

Yes. Tim T. Lai, MD, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Tim T. Lai, MD, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurology) reassigns their Medicare billing to Tim T. Lai, MD, Inc.. 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 Tim T. Lai, MD, Inc. was last updated on March 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.