Dr. Thomas C. O'Neil, MD
- Medicare services, 2024
- 756
- Medicare patients, 2024
- 138
- Part D claims, 2024
- 472
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 303 W Eaton Ave, Tracy, CA 95376-3418
- Practice phone
- Call (209) 836-1155
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tracy Eye Care Medical Clinic
Physician office · Tracy, California
Find Dr. O'Neil's professional email, personal email and mobile number
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Dr. Thomas C. O'Neil is an ophthalmologist in Tracy, California
Dr. O'Neil practices at Tracy Eye Care Medical Clinic in Tracy, California.
Dr. O'Neil's NPI, 1831162999, was assigned on February 9, 2006. Dr. O'Neil graduated from University of Iowa, RJ & L Carver College of Medicine in 1978. Dr. O'Neil holds California license A34142.
- NPI
- 1831162999NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315002888
- NPI enumeration date
- February 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 836-1155
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas C. O'Neil practices at Tracy Eye Care Medical Clinic in Tracy, California
Dr. O'Neil's primary practice is Tracy Eye Care Medical Clinic, at 303 W Eaton Ave, Tracy, CA 95376-3418. The practice phone is (209) 836-1155.
- Tracy Eye Care Medical Clinic303 W Eaton Ave, Tracy, CA 95376-3418Phone(209) 836-1155
Source: Dmand AI Affiliation Data
Dr. Thomas C. O'Neil is affiliated with 1 site of care
Dr. O'Neil's primary practice is Tracy Eye Care Medical Clinic in Tracy, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas C. O'Neil's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Neil practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tracy Eye Care Medical Clinic | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas C. O'Neil is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. O'Neil's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. O'Neil is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Ophthalmologists near Dr. O'Neil
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas C. O'Neil billed Medicare for 756 services in 2024
CMS data shows 756 Medicare services from Dr. O'Neil across 11 procedure codes in 2024, for 138 Medicare patients. Medicare paid $32,095 for them. Every service was in an office.
Dr. O'Neil's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 5902024: 50714%
- Office and hospital visits
- 2023: 2632024: 21518%
- Imaging
- 2023: 872024: 3461%
Dr. O'Neil compared with the California median for ophthalmologists, 2024
- Dr. O'Neil
- California median
- Medicare services
- 756vs 1,07930% below
- Medicare patients
- 138vs 42167% below
- Part D claims
- 397vs 61836% below
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. O'Neil's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas C. O'Neil treated 138 Medicare patients in 2024, average age 75
CMS counts 138 Medicare patients who saw Dr. O'Neil in 2024. The largest group is 65 to 74, with 62 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 46% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Neil's median patient age at 62, with 56% women.
Dr. O'Neil's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. O'Neil's Medicare patients by sex, 2024
- Women8461%
- Men5439%
Chronic conditions among Dr. O'Neil's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes46%
- Arthritis41%
- Ischemic heart disease33%
- Chronic kidney disease31%
- Osteoporosis21%
- Atrial fibrillation14%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Neil's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas C. O'Neil wrote 472 Medicare Part D claims in 2024
In 2024, Dr. O'Neil wrote 472 Medicare Part D claims for 101 patients. 56% of them were for generic drugs. CMS names the drug for 397 of them, across 12 drugs with 11 or more claims each, at $33,005 in total drug cost. In 2023, CMS named 319 claims across 10 drugs.
Dr. O'Neil's Part D claims by kind of drug, 2024
- Generic266 claims56%
- Brand-name206 claims44%
Dr. O'Neil's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. O'Neil's Part D claims, 2024
- Antibiotics4%21 of 472 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3192024: 39724%
Drugs named by CMS: 12 in 2024, 10 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Thomas C. O'Neil ranks in the 34th percentile for cataract surgery in Medicare
Dr. O'Neil accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 12 procedures of cataract surgery by Dr. O'Neil, more than 34% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. O'Neil ranks in Medicare procedure volume
- Cataract surgery
- 34th percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas C. O'Neil graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. O'Neil graduated from University of Iowa, RJ & L Carver College of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas C. O'Neil's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thomas C. O'Neil
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thomas C. O'Neil's NPI number?
Dr. Thomas C. O'Neil's NPI number is 1831162999. It was assigned on February 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas C. O'Neil?
Dr. Thomas C. O'Neil is an ophthalmologist in Tracy, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Thomas C. O'Neil practice?
Dr. O'Neil practices at 303 W Eaton Ave, Tracy, CA 95376-3418. Dr. O'Neil's primary practice is Tracy Eye Care Medical Clinic in Tracy, California.
What is Dr. Thomas C. O'Neil's office phone number?
The practice phone on file for Dr. O'Neil is (209) 836-1155.
What is Dr. Thomas C. O'Neil's medical license number?
Dr. O'Neil holds California license A34142.
Does Dr. Thomas C. O'Neil accept Medicare?
Yes. CMS data shows Dr. O'Neil billed Medicare for 756 services in 2024, and Dr. O'Neil accepts Medicare assignment.
How many Medicare patients does Dr. Thomas C. O'Neil see?
CMS counts 138 Medicare patients who saw Dr. O'Neil in 2024, with an average age of 75.
What services does Dr. Thomas C. O'Neil bill to Medicare?
In 2024, Dr. O'Neil's most billed Medicare services were office visit, established patient (99214), allergy test or treatment (95060) and eye exam or test (92134).
Where did Dr. Thomas C. O'Neil go to medical school?
Dr. O'Neil graduated from University of Iowa, RJ & L Carver College of Medicine in 1978.
What drugs does Dr. Thomas C. O'Neil prescribe most?
In 2024 Medicare Part D data, Dr. O'Neil's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Timolol Maleate.
How long has Dr. Thomas C. O'Neil been practicing?
Dr. O'Neil graduated from medical school in 1978, 48 years ago.
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