Vivien Au, D.O.
NPI 1649550872 · Ophthalmology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivien Au, D.O. is a Ophthalmology Physician provider in Pasadena, CA (NPI 1649550872).
Provider details
- NPI number
- 1649550872
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- OT014234 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,816 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 750 | $156 |
| Imaging of Optic Nerve92133 | 564 | $45 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 532 | $19 |
| Exam of Visual Field With Extended Testing92083 | 347 | $83 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 230 | $111 |
| Exam of the Internal Drainage System of Eye92020 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 860 | 258 |
| Timolol Maleate | 305 | 106 |
| Brimonidine Tartrate | 266 | 95 |
| Erythromycin Basebrand: Erythromycin | 191 | 127 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 186 | 56 |
| Dorzolamide Hcl | 121 | 38 |
| Diclofenac Sodium | 63 | 58 |
| Latanoprostene Bunod |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-08-19
- Last updated
- 2016-11-06
Frequently asked questions
- What is Vivien Au's NPI number?
- Vivien Au's National Provider Identifier (NPI) is 1649550872, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivien Au's specialty?
- Vivien Au is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Vivien Au located?
- Vivien Au's practice location on file with NPPES is 2619 E Colorado Blvd, Pasadena, CA 91107-3747.
- What is Vivien Au's phone number?
- The practice phone number listed in the NPPES registry for Vivien Au is (626) 793-3475.
- Does Vivien Au accept Medicare?
- Vivien Au is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivien Au's NPI active?
- Yes — Vivien Au's NPI (1649550872) is active in the NPPES registry as of the last update on 2016-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.