Dr. Samuel S. Masters, MD
- Medicare services, 2024
- 373
- Medicare patients, 2024
- 285
- Part D claims, 2024
- 256
- Hospital affiliations
- 2
- Industry payments
- $395
- Practice address
- 1555 Soquel Drive, Santa Cruz, CA 95065
- Practice phone
- Call (831) 462-7700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Masters' 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. Samuel S. Masters is an ophthalmologist in Santa Cruz, California
Dr. Masters practices at Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health.
Dr. Masters' NPI, 1265588784, was assigned on January 26, 2007. Dr. Masters graduated from Yale School of Medicine in 1971. Dr. Masters holds California license G55792.
- NPI
- 1265588784NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486767910
- NPI enumeration date
- January 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (831) 462-7700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Samuel S. Masters practices at Dignity Health - Dominican Hospital in Santa Cruz, California
Dr. Masters' primary practice is Dignity Health - Dominican Hospital, at 1555 Soquel Drive, Santa Cruz, CA 95065 in Santa Cruz County. The practice phone is (831) 462-7700.
- Dignity Health - Dominican Hospital1555 Soquel Drive, Santa Cruz, CA 95065 · Santa Cruz CountyPhone(831) 462-7700
Source: Dmand AI Affiliation Data
Dr. Samuel S. Masters is affiliated with 2 sites of care
Dr. Masters' primary practice is Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health. Dmand AI also links Dr. Masters to 1 hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Samuel S. Masters' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Masters practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Dominican Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Samuel S. Masters is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Masters' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Masters is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Masters' licenses on file in 2 states: California and Hawaii.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Hawaii license
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cold sores or genital herpes, conjunctivitis, dry eye, eye infection or inflammation, eyelid inflammation and glaucoma among the conditions Dr. Masters treats.
Ophthalmologists near Dr. Masters
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. Samuel S. Masters billed Medicare for 373 services in 2024
CMS data shows 373 Medicare services from Dr. Masters across 8 procedure codes in 2024, for 285 Medicare patients. Medicare paid $29,405 for them. Every service was in an office.
Dr. Masters' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3392024: 28715%
- Office and hospital visits
- 2023: 802024: 868%
Dr. Masters compared with the California median for ophthalmologists, 2024
- Dr. Masters
- California median
- Medicare services
- 373vs 1,07965% below
- Medicare patients
- 285vs 42132% below
- Part D claims
- 155vs 61875% below
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Masters' 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.
Need commercial claims for Dr. Masters?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Masters and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Samuel S. Masters treated 285 Medicare patients in 2024, average age 76
CMS counts 285 Medicare patients who saw Dr. Masters in 2024. The largest group is 75 to 84, with 135 patients. 67% of them have high cholesterol, and 63% have high blood pressure. 19% are also on Medicaid. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Masters' median patient age at 65, with 79% women.
Dr. Masters' Medicare patients by age, 2024
Dr. Masters' Medicare patients by sex, 2024
- Women16558%
- Men12042%
Chronic conditions among Dr. Masters' Medicare patients, 2024
- High cholesterol67%
- High blood pressure63%
- Arthritis33%
- Diabetes25%
- Atrial fibrillation19%
- Chronic kidney disease19%
- Mood disorders17%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Masters' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women79%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Samuel S. Masters wrote 256 Medicare Part D claims in 2024
In 2024, Dr. Masters wrote 256 Medicare Part D claims for 58 patients. 66% of them were for generic drugs. CMS names the drug for 155 of them, across 5 drugs with 11 or more claims each, at $2,315 in total drug cost. In 2023, CMS named 186 claims across 6 drugs.
Dr. Masters' Part D claims by kind of drug, 2024
- Generic169 claims66%
- Brand-name87 claims34%
Dr. Masters' 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: 1862024: 15517%
Drugs named by CMS: 5 in 2024, 6 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
How Dr. Samuel S. Masters takes part in Medicare
Dr. Masters accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Samuel S. Masters received $395 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. Masters from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 90% of the total. Novartis Pharmaceuticals Corporation paid the most, $109.
General payments to Dr. Masters by program year, 2016 to 2025
General payments to Dr. Masters by kind, 2016 to 2025
- Food and beverage$35890%
- Education$3810%
Companies that paid Dr. Masters 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. Samuel S. Masters has 1 award and honors on record
Dmand AI lists 1 award for Dr. Masters.
Awards and honors for Dr. Masters
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Samuel S. Masters graduated from Yale School of Medicine
Dr. Masters graduated from Yale School of Medicine in 1971. Dr. Masters is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Samuel S. Masters accepts plans from 8 insurance carriers
Dr. Masters is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Masters accepts, by number of carriers
- Medicare6
- PPO5
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Samuel S. Masters'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 DataDmand AI Org Hierarchy 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) |
| 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. Samuel S. Masters
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. Samuel S. Masters' NPI number?
Dr. Samuel S. Masters' NPI number is 1265588784. It was assigned on January 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Samuel S. Masters?
Dr. Samuel S. Masters is an ophthalmologist in Santa Cruz, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Samuel S. Masters practice?
Dr. Masters practices at 1555 Soquel Drive, Santa Cruz, CA 95065. Dr. Masters' primary practice is Dignity Health - Dominican Hospital in Santa Cruz, California, part of CommonSpirit Health. Dmand AI also links Dr. Masters to 1 hospital.
What is Dr. Samuel S. Masters' office phone number?
The practice phone on file for Dr. Masters is (831) 462-7700.
What is Dr. Samuel S. Masters' medical license number?
Dr. Masters holds California license G55792, one of the licenses on file in 2 states.
Which states has Dr. Samuel S. Masters been licensed in?
Dmand AI has state licenses on file for Dr. Masters in California (1985 to 2027) and Hawaii (1985 to 1994).
Which hospitals is Dr. Samuel S. Masters affiliated with?
Dr. Masters practices at Dignity Health - Dominican Hospital in Santa Cruz, California. Dmand AI links Dr. Masters to 1 more hospital.
Does Dr. Samuel S. Masters accept Medicare?
Yes. CMS data shows Dr. Masters billed Medicare for 373 services in 2024, and Dr. Masters accepts Medicare assignment.
How many Medicare patients does Dr. Samuel S. Masters see?
CMS counts 285 Medicare patients who saw Dr. Masters in 2024, with an average age of 76.
Is Dr. Samuel S. Masters board certified?
Yes. Dr. Masters is board certified in ophthalmology by the American Board of Ophthalmology.
Show 6 more questionsShow fewer questions
What services does Dr. Samuel S. Masters bill to Medicare?
In 2024, Dr. Masters' most billed Medicare services were eye exam or test (92014), office visit, established patient (99212) and office visit, established patient (99213).
Where did Dr. Samuel S. Masters go to medical school?
Dr. Masters graduated from Yale School of Medicine in 1971.
What drugs does Dr. Samuel S. Masters prescribe most?
In 2024 Medicare Part D data, Dr. Masters' most prescribed drugs by claims were Latanoprost, Neomycin-Polymyxin-Dexameth and Timolol Maleate.
Has Dr. Samuel S. Masters received payments from drug or device companies?
CMS Open Payments shows $395 in general payments to Dr. Masters from 5 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Samuel S. Masters been practicing?
Dr. Masters graduated from medical school in 1971, 55 years ago.
What insurance does Dr. Samuel S. Masters accept?
Dr. Masters is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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