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GEORGE KAREEM ISTAPHANOUS M.D.
NPI 1609096395
Anesthesiology in Orange, CA

Active since April 26, 2007PECOS Enrolled
681 S PARKER ST, ORANGE, CA 92868(714) 744-0900(714) 744-9232 Get Directions Write a Review

NPPES record last updated: February 19, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 19, 2019, Feb 1, 2019 (2 updates tracked since 2019).

About George Kareem Istaphanous M.d. NPPES

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

GEORGE KAREEM ISTAPHANOUS M.D. (NPI 1609096395) is an individual anesthesiology provider in Orange, California, licensed in California (A105906) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1609096395
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameGEORGE KAREEM ISTAPHANOUSCredential: M.D.
Location Address681 S PARKER STOrange, CA 92868-4719
Mailing Address210 N Tustin AveSanta Ana, CA 92705-3807 · (714) 347-1000 · Fax (714) 647-1245
Phone(714) 744-0900
Fax(714) 744-9232
Sole ProprietorNo
Enumeration DateApril 26, 2007
Last NPPES UpdateFebruary 19, 20192 updates tracked since enumeration
✔ NPI 1609096395 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A105906
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.
681 S PARKER ST, Orange, CA 92868
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

George Kareem Istaphanous M.d. 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 Reassignments

2

Medicare enrollment records show George Istaphanous reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

West Coast Anesthesia Inc A Medical Group
14 mi
Anesthesiology
23961 CALLE DE LA MAGDALENA, SUITE 541
Laguna Hills, CA 92653
  • Reassigned Medicare billing, California enrollment
  • 20 clinicians in this Medicare group
NPI 1972634020 (949) 287-5600
Western Anesthesia Medical Associates Inc
19 mi
Anesthesiology
27700 MEDICAL CENTER RD
Mission Viejo, CA 92691
  • Reassigned Medicare billing, California enrollment
  • 56 clinicians in this Medicare group
NPI 1497796320 (949) 364-1400

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 10

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

SURGICARE OF LA VETA LTD
Clinic/Center (Ambulatory Surgical)
681 S PARKER ST, SUITE 150
ORANGE, CA 92868
Orange County (714) 744-0900
TRUNG X NGUYEN M.D.
Anesthesiology
681 S PARKER ST, SUITE 150
ORANGE, CA 92868
Orange County (714) 277-1900
PHILLIP RICHARDSON MD INC
Anesthesiology
681 S PARKER ST, STE 150
ORANGE, CA 92868
Orange County (714) 744-0900
CRYSTAL ANESTHESIOLOGY INC
Anesthesiology
681 S PARKER ST
ORANGE, CA 92868
Orange County (262) 342-6695
DR. JEAN E SPRENGEL M.D.
Anesthesiology
681 S PARKER ST, STE 150
ORANGE, CA 92868
Orange County (714) 744-0900
MICHAEL CHAN DAM MD
Internal Medicine (Cardiovascular Disease)
681 S PARKER ST, STE 100
ORANGE, CA 92868
Orange County (714) 445-0220
SUPERIOR ANESTHESIA SERVICES A MEDICAL GROUP
Anesthesiology
681 S PARKER ST, SUITE 150
ORANGE, CA 92868
Orange County (714) 744-0900
DR. NANDITA RANI KAKAR D.O.
Anesthesiology
681 S PARKER ST, SUITE 150
ORANGE, CA 92868
Orange County (562) 544-7131

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 George Istaphanous's NPI number?

The NPI number for George Istaphanous is 1609096395. It was assigned to this individual provider in the NPPES registry on April 26, 2007.

Where is George Istaphanous located?

George Istaphanous practices at 681 S Parker St, Orange, CA 92868. The listed phone number is (714) 744-0900.

What is George Istaphanous's specialty?

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

Is George Istaphanous enrolled in Medicare?

Yes. George Istaphanous is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for George Istaphanous's services?

According to the CMS Revalidation Reassignment List (October 2026 release), George Istaphanous reassigns Medicare benefits to 2 organizations: West Coast Anesthesia Inc A Medical Group (Laguna Hills, CA) and Western Anesthesia Medical Associates Inc (Mission Viejo, CA). Each 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 George Istaphanous'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 George Istaphanous was last updated on February 19, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.