RICHARD A GUERRERO JR MD A MEDICAL CORPORATION
NPI 1518112382
Surgery in Fountain Valley, CA

Q: What is Richard A Guerrero Jr MD A Medical Corporation's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Active since November 20, 2008

11100 WARNER AVE STE 266, FOUNTAIN VALLEY, CA 92708(714) 617-4733(714) 617-4748 Get Directions Write a Review

NPPES record last updated: July 31, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 31, 2026, Jun 9, 2019 (2 updates tracked since 2019).

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About Richard A Guerrero Jr Md A Medical Corporation NPPES

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

RICHARD A GUERRERO JR MD A MEDICAL CORPORATION (NPI 1518112382) is a healthcare organization registered as a surgery in Fountain Valley, California and active in the NPI registry since November 2008. The organization lists Richard A Guerrero, President, as its authorized official.

NPPES Registry Identity

NPI1518112382

Entity TypeOrganization

Primary Taxonomy208600000X

Legal Business NameRICHARD A GUERRERO JR MD A MEDICAL CORPORATION

Location Address11100 WARNER AVE STE 266Fountain Valley, CA 92708-7512

Mailing Address5267 Warner Ave, #322Huntington Beach, CA 92649-4079 · (714) 617-4733 · Fax (714) 617-4748

Phone(714) 617-4733

Fax(714) 617-4748

Organization SubpartNo

Authorized OfficialRichard A GuerreroPresident · (714) 617-4733

Enumeration DateNovember 20, 2008

Last NPPES UpdateJuly 31, 20262 updates tracked since enumeration

NPPES CertifiedJuly 31, 2026

✔ NPI 1518112382 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · A79327

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

11100 WARNER AVE STE 266, Fountain Valley, CA 92708

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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)

Richard A Guerrero Jr Md A Medical 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 Richard A Guerrero Jr MD A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Richard Guerrero, M.D.

General Surgery

NPI 1891715835

11100 WARNER AVE STE 266
Fountain Valley, CA 92708

(714) 617-4733

✔ PECOSSame 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 Richard A Guerrero Jr MD A Medical Corporation's NPI number?

The NPI number for Richard A Guerrero Jr MD A Medical Corporation is 1518112382. It was assigned to this organization in the NPPES registry on November 20, 2008.

Where is Richard A Guerrero Jr MD A Medical Corporation located?

Richard A Guerrero Jr MD A Medical Corporation is located at 11100 Warner Ave Ste 266, Fountain Valley, CA 92708. The listed phone number is (714) 617-4733.

What is Richard A Guerrero Jr MD A Medical Corporation's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Richard A Guerrero Jr MD A Medical Corporation enrolled in Medicare?

Yes. Richard A Guerrero Jr MD A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Richard A Guerrero Jr MD A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (General Surgery) reassigns their Medicare billing to Richard A Guerrero Jr MD A 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Richard A Guerrero Jr MD A Medical Corporation was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.