Mary Liao, O.D.
NPI 1992858526 · Optometrist · Oxnard, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Liao, O.D. is a Optometrist provider in Oxnard, CA (NPI 1992858526).
Provider details
- NPI number
- 1992858526
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- Sole proprietor
- No
- License
- OPT11515-TLG (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
1,444 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 Problem Focused Exam of Visual System92012 | 427 | $99 |
| Established Patient Complete Exam of Visual System92014 | 359 | $139 |
| Exam of Visual Field With Extended Testing92083 | 210 | $71 |
| Imaging of Optic Nerve92133 | 189 | $39 |
| Imaging of Retina92134 | 129 | $44 |
| New Patient Complete Exam of Visual System92004 | 62 | $164 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 53 | 19 |
| Cyclosporine | 30 | 15 |
| Bimatoprostbrand: Lumigan | 29 | — |
| Cyclosporinebrand: Restasis | 24 | — |
| Prednisolone Acetate | 18 | 13 |
| Latanoprostene Bunodbrand: Vyzulta | 17 | — |
| Acyclovir | 16 | — |
| Dorzolamide Hcl/Timolol Maleat |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$170 across 3 records (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
- 2007-01-18
- Last updated
- 2024-05-15
- Certified
- 2024-05-15
Frequently asked questions
- What is Mary Liao's NPI number?
- Mary Liao's National Provider Identifier (NPI) is 1992858526, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Liao's specialty?
- Mary Liao is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mary Liao located?
- Mary Liao's practice location on file with NPPES is 1700 N Rose Ave, Oxnard, CA 93030-3790.
- What is Mary Liao's phone number?
- The practice phone number listed in the NPPES registry for Mary Liao is (805) 983-0700.
- Does Mary Liao accept Medicare?
- Mary Liao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Liao's NPI active?
- Yes — Mary Liao's NPI (1992858526) is active in the NPPES registry as of the last update on 2024-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.