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DR. STEPHEN ALEXANDER WESTERHOUT MD
NPI 1679513279
Anesthesiology in Seal Beach, CA

Active since June 08, 2006PECOS Enrolled
770 PACIFIC COAST HWY, SEAL BEACH, CA 90740(949) 350-0115 Get Directions Write a Review

NPPES record last updated: April 17, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Stephen Alexander Westerhout Md NPPES

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

DR. STEPHEN ALEXANDER WESTERHOUT MD (NPI 1679513279) is an individual anesthesiology provider in Seal Beach, California, licensed in California (A76842) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1679513279
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. STEPHEN ALEXANDER WESTERHOUTCredential: MD
Location Address770 PACIFIC COAST HWYSeal Beach, CA 90740-6215
Mailing AddressPo Box 5486Orange, CA 92863-5486 · (818) 550-0900 · Fax (818) 550-0900
Phone(949) 350-0115
Sole ProprietorYes
Enumeration DateJune 8, 2006
Last NPPES UpdateApril 17, 2025
NPPES CertifiedApril 17, 2025
✔ NPI 1679513279 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A76842
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.
770 PACIFIC COAST HWY, Seal Beach, CA 90740
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Secondary Practice Locations 3

Location 1361 Hospital Rd Ste 124Newport Beach, CA 92663-3521 · Phone (949) 631-0988 · Fax (949) 631-2504
Location 21441 Avocado Ave Ste 100Newport Beach, CA 92660-7702 · Phone (949) 350-0115
Location 34968 Booth Cir Ste 105Irvine, CA 92604-3366 · Phone (949) 350-0115

Other Identifiers 1

Medicaid00A768420CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Alexander Westerhout Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Stephen Westerhout reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Allied Anesthesia Medical Group Inc
  • Reassigned Medicare billing, California enrollment
  • 420 clinicians in this Medicare group
No phone listed

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHOHET EAR ASSOCIATES MEDICAL GROUP INC
Otolaryngology (Otology & Neurotology)
770 PACIFIC COAST HWY
SEAL BEACH, CA 90740
Orange County (562) 795-6199
SEA SURGERY CENTER, LLC
Clinic/Center (Ambulatory Surgical)
770 PACIFIC COAST HWY
SEAL BEACH, CA 90740
Orange County (562) 352-8396
HANNAH JOSEPH AUD
Audiologist
770 PACIFIC COAST HWY
SEAL BEACH, CA 90740
Orange County (562) 270-4327

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 Stephen Westerhout's NPI number?

The NPI number for Stephen Westerhout is 1679513279. It was assigned to this individual provider in the NPPES registry on June 8, 2006.

Where is Stephen Westerhout located?

Stephen Westerhout practices at 770 Pacific Coast Hwy, Seal Beach, CA 90740. The listed phone number is (949) 350-0115.

What is Stephen Westerhout's specialty?

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

Is Stephen Westerhout enrolled in Medicare?

Yes. Stephen Westerhout is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephen Westerhout's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Westerhout reassigns Medicare benefits to Allied Anesthesia Medical Group Inc (CA). The 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 Stephen Westerhout's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Stephen Westerhout was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.