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KATHERINE AU MD
NPI 1689888042
Plastic Surgery - Surgery of the Hand in Pasadena, CA

Active since May 09, 2007PECOS Enrolled
909 S FAIR OAKS AVE, PASADENA, CA 91105(626) 389-9300(626) 389-9336 Get Directions Write a Review

NPPES record last updated: May 18, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Katherine Au Md NPPES

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

KATHERINE AU MD (NPI 1689888042) is an individual surgery of the hand provider in Pasadena, California, licensed in California (A101676) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689888042
Entity TypeIndividualFemale
Primary Taxonomy2082S0105X
Provider Legal NameKATHERINE AUCredential: MD
Location Address909 S FAIR OAKS AVEPasadena, CA 91105-2625
Mailing AddressPo Box 8500, Shriners Hospitals For Children Los AngelesPhiladelphia, PA 19178-7642 · (813) 281-8478 · Fax (813) 281-8113
Phone(626) 389-9300
Fax(626) 389-9336
Sole ProprietorNo
Enumeration DateMay 9, 2007
Last NPPES UpdateMay 18, 2018
✔ NPI 1689888042 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPlastic Surgery · Surgery of the HandAllopathic & Osteopathic Physicians
Taxonomy Code2082S0105X
License✔ Licensed in CA · A101676
Definition
A plastic surgeon with additional training in the investigation, preservation, and restoration by medical, surgical and rehabilitative means of all structures of the upper extremity directly affecting the form and function of the hand and wrist.
Also ListedPlastic SurgeryTaxonomy 208200000X · License A101676 (CA)
909 S FAIR OAKS AVE, Pasadena, CA 91105
Open in Google Maps ↗

Other Identifiers 1

Medicaid0A1016760CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Katherine Au 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 Reassignments

3

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

Shriners Hospitals For Children
Same address
Anesthesiology
909 S FAIR OAKS AVE
Pasadena, CA 91105
  • Reassigned Medicare billing, California enrollment
  • 31 clinicians in this Medicare group
NPI 1821587544 (626) 389-9300
Orthopaedic Hospital
10 mi
Home Infusion
403 WEST ADAMS BLVD.
Los Angeles, CA 90007
  • Reassigned Medicare billing, California enrollment
  • 26 clinicians in this Medicare group
NPI 1689632374 (213) 742-1104
Orthopaedic Hospital Medical Group Inc
10 mi
Orthopaedic Surgery
403 W ADAMS BLVD
Los Angeles, CA 90007
  • Reassigned Medicare billing, California enrollment
  • 29 clinicians in this Medicare group
NPI 1942300918 (213) 742-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

JUSTINE URAUCHI DPT
Physical Therapist
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9515
PEDIATRIC ORTHOTIC AND PROSTHETIC SERVICES-WEST,LLC
Prosthetic/Orthotic Supplier
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9411
JACQUELYN FISCHER DPT
Physical Therapist
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9300
DE-AN ZHANG MD
Anesthesiology
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9300
SHRINERS HOSPITALS FOR CHILDREN
Clinic/Center (Medical Specialty)
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (213) 388-3151
MARTIN M MENDOZA
Orthotist
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9411
AIDS SERVICE CENTER
Community/Behavioral Health
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 441-8495
ALONZO RAFAEL HIDALGO OTR/L
Occupational Therapist
909 S FAIR OAKS AVE
PASADENA, CA 91105
Los Angeles County (626) 389-9515

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 Katherine Au's NPI number?

The NPI number for Katherine Au is 1689888042. It was assigned to this individual provider in the NPPES registry on May 9, 2007.

Where is Katherine Au located?

Katherine Au practices at 909 S Fair Oaks Ave, Pasadena, CA 91105. The listed phone number is (626) 389-9300.

What is Katherine Au's specialty?

The primary specialty registered for this NPI is Plastic Surgery, specializing in Surgery of the Hand, with taxonomy code 2082S0105X.

Is Katherine Au enrolled in Medicare?

Yes. Katherine Au is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Katherine Au's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Au reassigns Medicare benefits to 3 organizations: Shriners Hospitals For Children (Pasadena, CA), Orthopaedic Hospital (Los Angeles, CA) and Orthopaedic Hospital Medical Group Inc (Los Angeles, 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 Katherine Au's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katherine Au accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Katherine Au 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.

When was this NPI record last updated?

The NPPES record for Katherine Au was last updated on May 18, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.