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DR. ANDREW TAN MD
NPI 1184119505
Anesthesiology in Orange, CA

Active since June 27, 2018PECOS EnrolledAccepts Medicare Assignment
333 CITY BLVD W STE 2150, ORANGE, CA 92868(714) 456-6661(714) 456-7702 Get Directions Write a Review

NPPES record last updated: July 14, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 14, 2022, Jun 27, 2018 (2 updates tracked since 2018).

About Dr. Andrew Tan Md NPPES

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

DR. ANDREW TAN MD (NPI 1184119505) is an individual anesthesiology provider in Orange, California, licensed in California (A166162) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS and is a graduate of University Of Cincinnati College Of Medicine (2018).

NPPES Registry Identity

NPI1184119505
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. ANDREW TANCredential: MD
Location Address333 CITY BLVD W STE 2150Orange, CA 92868-5920
Mailing Address333 City Blvd W Ste 2150Orange, CA 92868-5920 · (714) 456-6661 · Fax (714) 456-7702
Phone(714) 456-6661
Fax(714) 456-7702
Sole ProprietorNo
Medical School CMSUniversity Of Cincinnati College Of MedicineGraduated 2018
Enumeration DateJune 27, 2018
Last NPPES UpdateJuly 14, 20222 updates tracked since enumeration
NPPES CertifiedJuly 14, 2022
✔ NPI 1184119505 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A166162
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
333 CITY BLVD W STE 2150, 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 and accepts Medicare assignment

Dr. Andrew Tan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3274960802
PECOS Enrollment IDI20220727002665
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

3

Medicare enrollment records show Andrew Tan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of
0.3 mi
Anesthesiology
101 THE CITY DR SOUTH
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 420 clinicians in this Medicare group
NPI 1487602546 (714) 456-8068
California Anesthesia Associates Medical Group, Inc.
17 mi
Anesthesiology
2801 ATLANTIC AVE
Long Beach, CA 90806
  • Reassigned Medicare billing, California enrollment
  • 107 clinicians in this Medicare group
NPI 1457399933 (562) 933-2000
Western Anesthesia Medical Associates Inc
20 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 20

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

VIVEK GULATI
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-6661
JASON JOHN COSMAN MD
Student in an Organized Health Care Education/Training Program
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-7890
SHALINI NAGARAJ
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-6661
VERONIKA ANUFREICHIK
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-6661
SCOTT ERWIN MD
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (916) 628-9169
ASHVIN ANIL MEHRA MD
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (818) 530-8792
BRENT G. YEUNG M.D.
Anesthesiology (Pain Medicine)
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-5835
DR. SHAWN THOMAS M.D.
Anesthesiology
333 CITY BLVD W STE 2150
ORANGE, CA 92868
Orange County (714) 456-5835

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 Andrew Tan's NPI number?

The NPI number for Andrew Tan is 1184119505. It was assigned to this individual provider in the NPPES registry on June 27, 2018.

Where is Andrew Tan located?

Andrew Tan practices at 333 City Blvd W Ste 2150, Orange, CA 92868. The listed phone number is (714) 456-6661.

What is Andrew Tan's specialty?

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

Is Andrew Tan enrolled in Medicare?

Yes. Andrew Tan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Andrew Tan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Tan reassigns Medicare benefits to 3 organizations: Regents Of The University Of (Orange, CA), California Anesthesia Associates Medical Group, Inc. (Long Beach, 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 Andrew Tan'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 Andrew Tan was last updated on July 14, 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.