Katherine Au, MD
Katherine Au is a Surgery of the Hand (Plastic Surgery) Physician provider (Plastic Surgery) practicing in Pasadena, CA, registered in the NPPES registry with NPI 1689888042 since 2007. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1689888042 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Katherine Au |
| Credential | MD |
| Sex | Female |
| Practice address | 909 S FAIR OAKS AVE, Pasadena, CA, 91105 |
| Phone | 6263899300 |
| Fax | 6263899336 |
| Enumeration date | 2007-05-09 |
| Last updated in NPPES | 2018-05-18 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208200000X | Plastic Surgery Physician | Secondary | A101676 | CA |
| 2082S0105X | Surgery of the Hand (Plastic Surgery) Physician | Primary | A101676 | CA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0A1016760 | Medicaid | CA | — |
Copy-ready billing details
Provider: Katherine Au, MD NPI: 1689888042 Taxonomy: 2082S0105X (Surgery of the Hand (Plastic Surgery) Physician) Address: 909 S FAIR OAKS AVE, Pasadena, CA, 91105
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1659585834 | Aids Service Center | Organization | Case Management Agency | Pasadena, CA |
| 1134375926 | Martin Mendoza | Individual | Orthotist | Pasadena, CA |
| 1184877003 | Selina Poon | Individual | Pediatric Orthopaedic Surgery Physician | Pasadena, CA |
| 1790016772 | Neha Patel | Individual | Anesthesiology Physician | Pasadena, CA |
| 1134420953 | Aids Service Center | Organization | Community/Behavioral Health Agency | Pasadena, CA |
| 1114217304 | De-An Zhang | Individual | Anesthesiology Physician | Pasadena, CA |
| 1568756468 | Cynthia Nguyen | Individual | Pediatric Orthopaedic Surgery Physician | Pasadena, CA |
| 1659642502 | Vangie Luong | Individual | Physician Assistant | Pasadena, CA |
Verify this record
Cross-check NPI 1689888042 against the authoritative CMS record: view Katherine Au on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What is the NPI number for Katherine Au?
Where does Katherine Au practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-05-18.