Dr. Marshall R. Contreras, MD
- Medicare services, 2023
- 1,067
- Part D claims, 2024
- 338
- Industry payments
- $1,035
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 880 Delbon Ave, Turlock, CA 95382
- Practice phone
- Call (209) 634-2925
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Turlock Eye Physicians Medical Group - Turlock
Eye care practice · Turlock, California
Find Dr. Contreras' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Marshall R. Contreras is an ophthalmologist in Turlock, California
Dr. Contreras practices at Turlock Eye Physicians Medical Group - Turlock in Turlock, California.
Dr. Contreras' NPI, 1760453096, was assigned on January 26, 2006. Dr. Contreras graduated from Meharry Medical College School of Medicine in 1977. Dr. Contreras holds California license C38129.
- NPI
- 1760453096NPI Registry (opens in a new tab)
- NPI enumeration date
- January 26, 2006
- NPI status
- Active
- Practice phone
- (209) 634-2925
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marshall R. Contreras practices at Turlock Eye Physicians Medical Group - Turlock in Turlock, California
Dr. Contreras' primary practice is Turlock Eye Physicians Medical Group - Turlock, at 880 Delbon Ave, Turlock, CA 95382. The practice phone is (209) 634-2925.
- Turlock Eye Physicians Medical Group - Turlock880 Delbon Ave, Turlock, CA 95382Phone(209) 634-2925
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marshall R. Contreras is affiliated with 1 site of care and 1 medical group
Dr. Contreras' primary practice is Turlock Eye Physicians Medical Group - Turlock in Turlock, California. Dmand AI also links Dr. Contreras to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Marshall R. Contreras' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Contreras practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Turlock Eye Physicians Medical Group - Turlock | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marshall R. Contreras is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Contreras' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Contreras is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Contreras' licenses on file in 3 states: California, Tennessee and Colorado.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Tennessee license
- Colorado license
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cold sores or genital herpes, conjunctivitis, dry eye, eyelid inflammation, glaucoma and glaucoma surgery among the conditions Dr. Contreras treats.
Ophthalmologists near Dr. Contreras
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. Marshall R. Contreras billed Medicare for 1,067 services in 2023
CMS data shows 1,067 Medicare services from Dr. Contreras across 9 procedure codes in 2023. Medicare paid $71,347 for them. Every service was in an office.
Dr. Contreras' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Tests and treatments
- 2022: 9422023: 75720%
- Office and hospital visits
- 2022: 3892023: 29025%
- Surgery
- 2022: 352023: 2043%
Dr. Contreras compared with the California median for ophthalmologists, 2023
- Dr. Contreras
- California median
- Medicare services
- 1,067vs 1,079Close to median
- Part D claims
- 270vs 61856% below
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Contreras' most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Contreras?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Contreras and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marshall R. Contreras' patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Contreras' median patient age at 75, with 60% women.
Dr. Contreras' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Marshall R. Contreras wrote 338 Medicare Part D claims in 2024
In 2024, Dr. Contreras wrote 338 Medicare Part D claims for 129 patients. 67% of them were for generic drugs. CMS names the drug for 270 of them, across 6 drugs with 11 or more claims each, at $5,605 in total drug cost. In 2023, CMS named 1,331 claims across 18 drugs.
Dr. Contreras' Part D claims by kind of drug, 2024
- Generic227 claims67%
- Brand-name111 claims33%
Dr. Contreras' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3312024: 27080%
Drugs named by CMS: 6 in 2024, 18 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
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Dr. Marshall R. Contreras received $1,035 in industry payments from 2016 to 2025
CMS Open Payments shows 51 general payments to Dr. Contreras from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Glaukos Corporation paid the most, $180.
General payments to Dr. Contreras by program year, 2016 to 2025
General payments to Dr. Contreras by kind, 2016 to 2025
- Food and beverage$99696%
- Gifts$394%
Companies that paid Dr. Contreras the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marshall R. Contreras has 1 award and honors on record
Dmand AI lists 1 award for Dr. Contreras.
Awards and honors for Dr. Contreras
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Marshall R. Contreras graduated from Meharry Medical College School of Medicine
Dr. Contreras graduated from Meharry Medical College School of Medicine in 1977. Dr. Contreras is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Marshall R. Contreras accepts plans from 5 insurance carriers
Dr. Contreras is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Humana
- Regence Health Plans
Plan types Dr. Contreras accepts, by number of carriers
- Medicare5
- PPO5
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Marshall R. Contreras'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Marshall R. Contreras
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. Marshall R. Contreras' NPI number?
Dr. Marshall R. Contreras' NPI number is 1760453096. It was assigned on January 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marshall R. Contreras?
Dr. Marshall R. Contreras is an ophthalmologist in Turlock, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Marshall R. Contreras practice?
Dr. Contreras practices at 880 Delbon Ave, Turlock, CA 95382. Dr. Contreras' primary practice is Turlock Eye Physicians Medical Group - Turlock in Turlock, California. Dmand AI also links Dr. Contreras to 1 medical group.
What is Dr. Marshall R. Contreras' office phone number?
The practice phone on file for Dr. Contreras is (209) 634-2925.
What is Dr. Marshall R. Contreras' medical license number?
Dr. Contreras holds California license C38129, one of the licenses on file in 3 states.
Which states has Dr. Marshall R. Contreras been licensed in?
Dmand AI has state licenses on file for Dr. Contreras in California (1978 to 2026), Tennessee (1978 to 1992) and Colorado (1980 to 1983).
Does Dr. Marshall R. Contreras accept Medicare?
Yes. CMS data shows Dr. Contreras billed Medicare for 1,067 services in 2023.
Is Dr. Marshall R. Contreras board certified?
Yes. Dr. Contreras is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Marshall R. Contreras bill to Medicare?
In 2023, Dr. Contreras' most billed Medicare services were eye exam or test (92014), office visit, established patient (99213) and eye exam or test (92133).
Where did Dr. Marshall R. Contreras go to medical school?
Dr. Contreras graduated from Meharry Medical College School of Medicine in 1977.
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What drugs does Dr. Marshall R. Contreras prescribe most?
In 2024 Medicare Part D data, Dr. Contreras' most prescribed drugs by claims were Latanoprost, Timolol Maleate and Brimonidine Tartrate.
Has Dr. Marshall R. Contreras received payments from drug or device companies?
CMS Open Payments shows $1,035 in general payments to Dr. Contreras from 16 companies from 2016 to 2025. The largest total came from Glaukos Corporation.
How long has Dr. Marshall R. Contreras been practicing?
Dr. Contreras graduated from medical school in 1977, 49 years ago.
What insurance does Dr. Marshall R. Contreras accept?
Dr. Contreras is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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