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ANTHONY KOO MD
NPI 1982897146
Anesthesiology in Phoenix, AZ

Active since August 21, 2007PECOS EnrolledAccepts Medicare Assignment
1919 E THOMAS RD, PHOENIX, AZ 85016(602) 933-1000 Get Directions Write a Review

NPPES record last updated: April 2, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 2, 2026, Sep 9, 2024, Aug 13, 2024 and 1 more (4 updates tracked since 2024).

About Anthony Koo Md NPPES

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

ANTHONY KOO MD (NPI 1982897146) is an individual anesthesiology provider in Phoenix, Arizona, licensed in Arizona (46139) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and maintains a secondary practice location in Marshfield.

NPPES Registry Identity

NPI1982897146
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameANTHONY KOOCredential: MD
Location Address1919 E THOMAS RDPhoenix, AZ 85016-7710
Mailing Address16658 N 108th StScottsdale, AZ 85255-9070 · (847) 452-0793
Phone(602) 933-1000
Sole ProprietorNo
Medical School CMSRush Medical College Of Rush UniversityGraduated 2007
Enumeration DateAugust 21, 2007
Last NPPES UpdateApril 2, 20264 updates tracked since enumeration
NPPES CertifiedApril 2, 2026
✔ NPI 1982897146 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in AZ · 46139
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 ListedAnesthesiology · Pediatric AnesthesiologyTaxonomy 207LP3000X · License 55599-20 (WI), 46139 (AZ)
1919 E THOMAS RD, Phoenix, AZ 85016
Open in Google Maps ↗

Secondary Practice Location 1

Location 11000 N OAK AVEMARSHFIELD, WI 54449-5703 · Phone (715) 387-5511

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, Inc., Sanford Health Plan and more.Insurance ›

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

Anthony Koo 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 ID1557530433
PECOS Enrollment IDI20110810000279, I20120814000241
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

8

Medicare enrollment records show Anthony Koo reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Phoenix Children's Hospital
Same address
Pediatrics
1919 E THOMAS RD
Phoenix, AZ 85016
  • Reassigned Medicare billing, Arizona enrollment
  • 1,416 clinicians in this Medicare group
NPI 1922112044 (602) 933-1000
District Medical Group, Inc
1.7 mi
Surgery
2525 E ROOSEVELT ST, MED CLINIC - INFECTIOUS DISEASE
Phoenix, AZ 85008
  • Reassigned Medicare billing, Arizona enrollment
  • 1,490 clinicians in this Medicare group
NPI 1174856280 (602) 344-1095
Mchs Hospitals Inc
1,345 mi
Clinic/Center
2310 CRAIG RD
Eau Claire, WI 54701
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1952890873 (Wisconsin)
  • 2,476 clinicians in this Medicare group
NPI 1316416035 (715) 858-8100
Lakeview Medical Center Inc Of Rice Lake
1,356 mi
Clinic/Center
806 2ND ST
Chetek, WI 54728
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,616 clinicians in this Medicare group
NPI 1659008605 (715) 924-2000
Memorial Hospital Inc
1,376 mi
Clinic/Center
N3708 RIVER AVE
Neillsville, WI 54456
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1346239373 (Wisconsin)
  • 1,440 clinicians in this Medicare group
NPI 1033701800 (715) 743-3101
Marshfield Clinic Inc
1,399 mi
Clinic/Center
1000 N OAK AVE
Marshfield, WI 54449
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,540 clinicians in this Medicare group
NPI 1952347981 (715) 387-5511
Beaver Dam Community Hosptials Inc
1,415 mi
Family Medicine
1580 W JAMES ST
Columbus, WI 53925
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Beaver Dam Community Hospitals Inc.
  • 1,447 clinicians in this Medicare group
NPI 1275833659 (920) 350-0235
Flambeau Hospital Inc
1,428 mi
Clinic/Center
98 SHERRY AVE
Park Falls, WI 54552
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1700963048 (Wisconsin)
  • 1,351 clinicians in this Medicare group
NPI 1194317966 (715) 762-2484

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Marshfield Medical Center

Acute Care Hospitals · Marshfield, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520037
Location611 St Joseph AveMarshfield, WI 54449 · Wood County
Emergency services Birthing friendly

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Post-Anesthetic Transfer of Care Measure: Procedure Room to a Post Anesthesia Care Unit (PACU)
Percentage of patients, regardless of age, who are under the care of an anesthesia practitioner and are admitted to a PACU or other non-ICU location in which a post-anesthetic formal transfer of care protocol or checklist which includes the key transfer of…
95%103 patients4/55-star benchmark: 100%
Pre-operative OSA assessment
Percentage of patients who undergo a surgical procedure in the operating room/procedure room that have a pre-operative assessment for Obstructive Sleep Apnea (OSA)
42%660 patients1/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

DR. TIMUR RAGHIB M.D.
Hospitalist
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0777
MRS. MARIA T ESCOBAR CSP, RD
Dietitian, Registered
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (480) 440-2787
DR. AHMAR HUSAIN MD
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
MRS. SOLEE R COWLEY LCSW
Social Worker (Clinical)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0414
MR. SEAN PATRICK BRADY DO
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
PRIYA PRASHER M.D.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1900
DR. AMIT RAJARAM D.O.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0198
LAURA GARDNER HAMANT
Pediatrics (Pediatric Gastroenterology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1000

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 Anthony Koo's NPI number?

The NPI number for Anthony Koo is 1982897146. It was assigned to this individual provider in the NPPES registry on August 21, 2007.

Where is Anthony Koo located?

Anthony Koo practices at 1919 E Thomas Rd, Phoenix, AZ 85016. The listed phone number is (602) 933-1000.

What is Anthony Koo's specialty?

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

Is Anthony Koo enrolled in Medicare?

Yes. Anthony Koo 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 Anthony Koo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Anthony Koo reassigns Medicare benefits to 8 organizations: Phoenix Children's Hospital (Phoenix, AZ), District Medical Group, Inc (Phoenix, AZ), Mchs Hospitals Inc (Eau Claire, WI), Lakeview Medical Center Inc Of Rice Lake (Chetek, WI), Memorial Hospital Inc (Neillsville, WI) and 3 more organizations, listed in the Medicare section above. 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 Anthony Koo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Anthony Koo accept?

Health plans from Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, Inc., Sanford Health Plan and Security Health Plan list Anthony Koo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Anthony Koo affiliated with any hospitals?

According to CMS data, Anthony Koo is affiliated with Marshfield Medical Center.

When was this NPI record last updated?

The NPPES record for Anthony Koo was last updated on April 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.