Medicare Enrolled

Dr. Mary Liao, O.D.

Optometrist · Oxnard, CA
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
Low-engagement
1700 N ROSE AVE, Oxnard, CA 93030
8059830700
In practice since 2007 (19 years)
NPI: 1992858526 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Liao from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Liao? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Liao

Dr. Mary Liao is an optometrist in Oxnard, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Liao performed 746 Medicare services across 667 unique beneficiaries.

Between the years covered by Open Payments, Dr. Liao received a total of $995 from 11 pharmaceutical and/or device companies across 22 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in optometrist. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Liao is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 19 years in practice ▲ Top 12% volume in CA $995 industry payments

Medicare Practice Summary

Medicare Utilization ↗
746
Medicare services
Top 12% in CA for optometrist
667
Unique beneficiaries
$68
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~39 Medicare services per year of practice

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Eye exam, established patient, focused
A limited examination of the visual system for an existing patient. The provider focuses on a specific eye-related concern or symptom.
 238 $72 $105
Comprehensive eye exam, established patient
A comprehensive examination of the visual system performed for a patient who has previously been seen by the provider.
 203 $94 $145
Optic nerve imaging (OCT scan)
Imaging of the optic nerve.
 106 $27 $85
Visual field test, extended
A test that maps your complete field of vision to detect blind spots or peripheral vision loss. Extended testing provides a more detailed assessment than a standard visual field exam.
 89 $53 $105
Retinal imaging (OCT scan)
This procedure involves imaging the retina to visualize its structure. It is used to examine the back of the eye.
 53 $33 $85
Comprehensive eye exam, new patient
A comprehensive examination of the visual system performed for a new patient.
 35 $105 $170
Office visit, established patient (20-29 min)
An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition.
 22 $78 $101
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.

Industry Payment Transparency

Open Payments through 2024 ↗
$995
Total received (2018-2024)
Avg $166/year across 6 years
Top 36% in CA for optometrist
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
11
Companies
22
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →

Payment profile

Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.

Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$995 (100.0%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$170
2023
$172
2022
$37
2021
$176
2019
$400
2018
$40

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
Amgen Inc.
$116
ABBVIE INC.
$34
Johnson & Johnson Vision Care, Inc.
$19
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
ABBVIE INC.
$159
Alcon Vision LLC
$157
Aerie Pharmaceuticals, Inc.
$142
Johnson & Johnson Vision Care, Inc.
$130
Amgen Inc.
$116
Johnson & Johnson Surgical Vision, Inc.
$107
Sun Pharmaceutical Industries Inc.
$85
Allergan Inc.
$45
Allergan, Inc.
$19
SUN PHARMACEUTICAL INDUSTRIES INC.
$18
Bausch & Lomb, a division of Bausch Health US, LLC
$16
Top 3 companies account for 46.0% of all-time payments
Associated products mentioned in payments ›
ALPHAGAN P · ARGOS · Acuvue · BromSite · CEQUA · COMBIGAN · Cequa · DAILIES · DURYSTA · LUMIGAN · Rhopressa · TEPEZZA · Tecnis Symfony IOL · VYZULTA · XEN GLAUCOMA TREATMENT SYSTEM · rocklatan
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →

Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.

Looking for an optometrist in Oxnard?
Compare optometrists in the Oxnard area by procedure volume, costs, and industry payment transparency.
Browse optometrists nearby

Geographic Context

Optometrists within 10 mi
181
Per 100K population
21.6
County median income
$107,327
Nearest hospital
ST JOHNS REGIONAL MEDICAL CENTER
0.0 mi

Data Sources

Provider Registry ✓ NPPES Weekly updates
Medicare Enrollment ✓ PECOS Monthly updates
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments ✓ Open Payments CY 2024
Disciplinary History — Not public N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →

Summary

Dr. Liao is a mixed practice specialist, with above-average Medicare volume (top 12% in CA), with low-engagement industry engagement, with 19 years of NPI registration.

This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →

Frequently Asked Questions

Is Dr. Liao experienced with eye exam, established patient, focused?
Based on Medicare claims data, Dr. Liao performed 238 eye exam, established patient, focused services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Liao receive payments from pharmaceutical companies?
Yes. Dr. Liao received a total of $995 from 11 companies across 22 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Liao's costs compare to other optometrists in Oxnard?
Dr. Liao's average Medicare payment per service is $68. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Liao) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →

Explore related providers

Same specialty & city
Optometrists in Oxnard
Browse optometrists in Oxnard ranked by procedure volume and transparency data.
Highest volume
Top Optometrists in CA
Optometrists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Optometrists in CA
Which CA optometrists receive the most from drug and device companies.
By company
ABBVIE INC. Payments to Doctors
See all physicians who received payments from ABBVIE INC.
By company
Alcon Vision LLC Payments to Doctors
See all physicians who received payments from Alcon Vision LLC.
By company
Aerie Pharmaceuticals, Inc. Payments to Doctors
See all physicians who received payments from Aerie Pharmaceuticals, Inc.
About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →