UNITED ANESTHESIOLOGY, INC.
NPI 1659381374
Anesthesiology in Santa Ana, CA

Q: What is United Anesthesiology, Inc.'s NPI number?

The NPI number for United Anesthesiology, Inc. is 1659381374. It was assigned to this organization in the NPPES registry on August 8, 2006.

Q: What is United Anesthesiology, Inc.'s specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Active since August 08, 2006

3200 SOUTH BRISTOL STREET, SUITE B, SANTA ANA, CA 92704(714) 641-1111(714) 641-1212 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, May 22, 2017 (2 updates tracked since 2017).

On this page

About United Anesthesiology, Inc. NPPES

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

UNITED ANESTHESIOLOGY, INC. (NPI 1659381374) is a healthcare organization registered as an anesthesiology in Santa Ana, California and active in the NPI registry since August 2006. The organization lists Atef E Rafla, President/ Owner, as its authorized official.

NPPES Registry Identity

NPI1659381374

Entity TypeOrganization

Primary Taxonomy207L00000X

Legal Business NameUNITED ANESTHESIOLOGY, INC.

Location Address3200 SOUTH BRISTOL STREET, SUITE BSanta Ana, CA 92704

Mailing Address3200 South Bristol Street, Suite BSanta Ana, CA 92704 · (714) 641-1111 · Fax (714) 641-1212

Phone(714) 641-1111

Fax(714) 641-1212

Organization SubpartNo

Authorized OfficialAtef E RaflaPresident/ Owner · (714) 641-1111

Enumeration DateAugust 8, 2006

Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration

✔ NPI 1659381374 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

3200 SOUTH BRISTOL STREET, Santa Ana, CA 92704

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Other Identifiers 1

MedicaidGR0101330CA

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)

United Anesthesiology, Inc. 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 United Anesthesiology, Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Atef Rafla, M.D.

Anesthesiology

NPI 1497796858

3200 SOUTH BRISTOL STREET SUITE B
Santa Ana, CA 92704

(714) 641-1111

✔ 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 United Anesthesiology, Inc.'s NPI number?

The NPI number for United Anesthesiology, Inc. is 1659381374. It was assigned to this organization in the NPPES registry on August 8, 2006.

Where is United Anesthesiology, Inc. located?

United Anesthesiology, Inc. is located at 3200 South Bristol Street Suite B, Santa Ana, CA 92704. The listed phone number is (714) 641-1111.

What is United Anesthesiology, Inc.'s specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is United Anesthesiology, Inc. enrolled in Medicare?

Yes. United Anesthesiology, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through United Anesthesiology, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Anesthesiology) reassigns their Medicare billing to United Anesthesiology, 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 United Anesthesiology, Inc. was last updated on July 21, 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.