OpenMedicare
Start Here
Explore
Fraud
Investigations
Data
Tools
About

Footer

OpenMedicare

Independent Medicare data journalism

Sister Sites

  • OpenMedicaid
  • OpenFeds
  • OpenSpending

Explore

  • Providers
  • Procedures
  • States
  • Specialties
  • Search

Fraud Analysis

  • Still Out There (AI)
  • Fraud Overview
  • Fraud Watchlist
  • Deep Dive Profiles
  • Impossible Numbers
  • Report Fraud

Investigations

  • The Algorithm Knows
  • How We Built the Model
  • Internal Medicine Crisis
  • Florida & California Fraud
  • Million Dollar Flagged
  • All Investigations

Tools

  • Provider Lookup
  • Compare
  • Cost Calculator
  • Your Medicare Dollar
  • Downloads

About

  • About OpenMedicare
  • Methodology
  • Glossary
  • Data Sources
  • API Docs
  • Updates
Data Sources: Centers for Medicare & Medicaid Services (CMS), Medicare Provider Utilization and Payment Data
Disclaimer: This site is an independent journalism project. Data analysis and editorial content are not affiliated with or endorsed by CMS or any government agency. All spending figures are based on publicly available Medicare payment records.
Sister Sites: OpenMedicaid ยท OpenFeds ยท OpenSpending

ยฉ 2026 OpenMedicare. Independent data journalism. Built by TheDataProject.ai

Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Adam Dao
๐Ÿ‘๏ธ
MDIndividual

Adam Dao, MD

NPI: 1770870446
San Diego, CA
10 years of data
Ophthalmology
$9.7M
Total Payments
47.0K
Beneficiaries
85.7K
Services
1.73x
Markup Ratio

Peer Comparison

98th
percentile in specialty
This provider$9.7M
Specialty median$383.7K

๐Ÿ“‹ Key Findings

1Billed $9.7M over 10 years
21.73x markup ratio
398th percentile in Ophthalmology by payments
4Payments surged 2275% in 2017
51 procedure with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $9.7M in total Medicare payments ranks in the 98th percentile of Ophthalmology providers nationally.

Medicare payments to this provider grew 127055% from 2014 to 2023.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

๐Ÿ“ˆ

Notable: Payments increased 2275% in 2017

Year-over-year payment surges can indicate changes in practice volume, new services, or billing pattern shifts.

Submitted Charges vs. Medicare Payments

Average per-service amounts submitted by the provider compared to what Medicare actually paid โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$150.00$66.722.25x$83.28$1.3K2017
2015$125.06$52.252.39x$72.81$31.1K404360
2016$151.26$44.563.39x$106.70$26.9K526439
2017$425.94$168.722.52x$257.22$637.9K7.8K6.3K
2018$317.76$150.532.11x$167.23$990.3K11.5K7.3K
2019$272.33$161.811.68x$110.52$1.6M15.2K7.5K
2020$250.17$150.651.66x$99.52$1.5M11.7K5.9K
2021$252.02$154.501.63x$97.52$1.6M12.4K6.3K
2022$265.71$149.991.77x$115.72$1.6M13.0K6.4K
2023$282.11$141.392.00x$140.72$1.7M13.3K6.5K

Top Procedures (20)

65778Insertion of amniotic membrane to eye surface
$5.1M
4.0K services$1.3K/svc1.42x markup
68761Closure of tear duct opening using plug
$1.0M
8.7K services$119.24/svc1.94x markup
92014Eye and medical examination for diagnosis and treatment, established patient, 1 or more visits
$896.5K
9.5K services$94.30/svc1.73x markup
92250Photography of the retina
$430.8K
11.0K services$39.11/svc2.48x markup
92012Eye and medical examination for diagnosis and treatment, established patient
$424.4K
5.9K services$72.23/svc1.79x markup
92020Examination of cornea and iris using lens device and slit lamp
$298.9K
12.6K services$23.68/svc1.78x markup
92134Diagnostic imaging of retina
$207.9K
6.2K services$33.39/svc2.29x markup
66984Removal of cataract with insertion of lens
$182.4K
362 services$503.78/svc2.46x markup
92285Photography of content of eyes
$142.6K
7.5K services$18.98/svc2.81x markup
92083Measurement of field of vision during daylight conditions
$120.7K
2.3K services$53.37/svc2.05x markup
92133Diagnostic imaging of optic nerve of eye
$118.0K
3.9K services$30.14/svc2.51x markup
99204New patient office or other outpatient visit, typically 45 minutesโš  3.6x markup
$94.8K
1.1K services$89.38/svc3.64x markup
99205New patient office or other outpatient visit, typically 60 minutes
$72.5K
506 services$143.32/svc1.95x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$64.5K
804 services$80.19/svc2.11x markup
92060Measurement of eye muscles to detect deviation of eyeball
$62.5K
1.2K services$52.27/svc1.54x markup
99215Established patient office or other outpatient, visit typically 40 minutes
$59.1K
564 services$104.81/svc2.02x markup
92226Examination of eye by ophthalmoscope with retinal drawing
$58.5K
2.7K services$21.48/svc1.78x markup
92225Examination of eye by ophthalmoscope with retinal drawing
$49.2K
2.2K services$22.44/svc2.09x markup
66982Removal of cataract with insertion of lens
$41.4K
63 services$657.19/svc2.29x markup
67700Incision and drainage of eyelid abscess
$35.7K
146 services$244.85/svc1.71x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
65778Insertion of amniotic membrane to eye surface4.0K$5.1M$1.3K1.42x
68761Closure of tear duct opening using plug8.7K$1.0M$119.241.94x
92014Eye and medical examination for diagnosis and treatment, established patient, 1 or more visits9.5K$896.5K$94.301.73x
92250Photography of the retina11.0K$430.8K$39.112.48x
92012Eye and medical examination for diagnosis and treatment, established patient5.9K$424.4K$72.231.79x
92020Examination of cornea and iris using lens device and slit lamp12.6K$298.9K$23.681.78x
92134Diagnostic imaging of retina6.2K$207.9K$33.392.29x
66984Removal of cataract with insertion of lens362$182.4K$503.782.46x
92285Photography of content of eyes7.5K$142.6K$18.982.81x
92083Measurement of field of vision during daylight conditions2.3K$120.7K$53.372.05x
92133Diagnostic imaging of optic nerve of eye3.9K$118.0K$30.142.51x
99204New patient office or other outpatient visit, typically 45 minutes1.1K$94.8K$89.383.64x
99205New patient office or other outpatient visit, typically 60 minutes506$72.5K$143.321.95x
99214Established patient office or other outpatient, visit typically 25 minutes804$64.5K$80.192.11x
92060Measurement of eye muscles to detect deviation of eyeball1.2K$62.5K$52.271.54x
99215Established patient office or other outpatient, visit typically 40 minutes564$59.1K$104.812.02x
92226Examination of eye by ophthalmoscope with retinal drawing2.7K$58.5K$21.481.78x
92225Examination of eye by ophthalmoscope with retinal drawing2.2K$49.2K$22.442.09x
66982Removal of cataract with insertion of lens63$41.4K$657.192.29x
67700Incision and drainage of eyelid abscess146$35.7K$244.851.71x

Markup Analysis

Charge-to-Payment Ratio

1.73x

This provider submits charges 1.73 times higher than what Medicare actually pays.

What This Means

A markup ratio of 1.73x means for every $100 Medicare pays, this provider initially charges $173. This is lower than the national average.

Location

San Diego, CA

Provider Verification

Always verify provider credentials and location before scheduling appointments. This data reflects Medicare payments and may not include all practice locations.

Similar Providers

Other Ophthalmology providers in CA for peer comparison.

Adam Dao (you)
$9.7M
Nathan Steinle, M.D.
$63.1M
Stephen Couvillion, MD
$47.7M
Margaret Chang, M.D.
$47.6M
David Boyer, MD
$47.5M
Alessandro Castellarin, M.D.
$46.9M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Nathan Steinle, M.D.Santa Barbara, CA$63.1Mโœ“ Clear
Stephen Couvillion, MDSanta Barbara, CA$47.7Mโœ“ Clear
Margaret Chang, M.D.Sacramento, CA$47.6Mโœ“ Clear
David Boyer, MDLos Angeles, CA$47.5Mโœ“ Clear
Alessandro Castellarin, M.D.Santa Barbara, CA$46.9Mโœ“ Clear

Related

Browse
โ† Back to Provider Directory
State
All providers in CA โ†’
Specialty
All Ophthalmology providers โ†’
Tool
Compare this provider โ†’
Analysis
Fraud Watchlist โ†’
Search
Search all providers โ†’

Share This Provider

Share this provider's Medicare payment information

Share:

Data Sources

  • โ€ข Centers for Medicare & Medicaid Services (CMS)
  • โ€ข Medicare Provider Utilization and Payment Data (2014-2023)
  • โ€ข National Plan and Provider Enumeration System (NPPES)

Last Updated: February 2026 (data through 2023, the latest CMS release)

Note: All data is from publicly available Medicare records. OpenMedicare is an independent journalism project not affiliated with CMS.

Believe this data is inaccurate? Dispute this data