Karen Au, MD
NPI 1144478306 · Rheumatology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Au, MD is a Rheumatology Physician provider in Los Angeles, CA (NPI 1144478306).
Provider details
- NPI number
- 1144478306
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A100616 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 266 | 106 |
| Prednisone | 220 | 103 |
| Hydroxychloroquine Sulfate | 216 | 83 |
| Azathioprine | 189 | 74 |
| Adalimumab-Attobrand: Amjevita(cf) Autoinjector | 163 | 31 |
| Leflunomide | 113 | 52 |
| Sulfasalazine | 107 | 46 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-29
- Last updated
- 2021-12-08
Frequently asked questions
- What is Karen Au's NPI number?
- Karen Au's National Provider Identifier (NPI) is 1144478306, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Au's specialty?
- Karen Au is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Au located?
- Karen Au's practice location on file with NPPES is 1000 Veteran Ave, Los Angeles, CA 90024-2704.
- What is Karen Au's phone number?
- The practice phone number listed in the NPPES registry for Karen Au is (310) 825-2448.
- Does Karen Au accept Medicare?
- Karen Au is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Au's NPI active?
- Yes — Karen Au's NPI (1144478306) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.