Dr. Ramona Master, MD
- Medicare services, 2022
- 449
- Part D claims, 2024
- 733
- Hospital affiliations
- 1
- Industry payments
- $1,008
- Medical groups
- 2
- Practice address
- 200 W Arbor Dr, San Diego, CA 92103
- Practice phone
- Call (619) 543-6060
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCSD Hillcrest Medical Center
San Diego, California
Find Dr. Master's 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. Ramona Master is an internist in San Diego, California
Dr. Master practices at UCSD Hillcrest Medical Center in San Diego, California.
Dr. Master's NPI, 1851429617, was assigned on March 1, 2007. Dr. Master graduated from Feinberg School of Medicine in 1994. Dr. Master's California license number on file is A55108.
- NPI
- 1851429617NPI Registry (opens in a new tab)
- NPI enumeration date
- March 1, 2007
- NPI status
- Active
- Practice phone
- (619) 543-6060
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Ramona Master practices at UCSD Hillcrest Medical Center in San Diego, California
Dr. Master's primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6060.
- UCSD Hillcrest Medical Center200 W Arbor Dr, San Diego, CA 92103 · San Diego CountyPhone(619) 543-6060
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ramona Master is affiliated with 3 sites of care and 2 medical groups
Dr. Master's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Master is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health. Dmand AI also links Dr. Master to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ramona Master's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Master practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSD Hillcrest Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ramona Master is one of 16,751 internists in California
Internal medicine is Dr. Master's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Master is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Master's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists itchy rashes, low blood pressure, lower back pain, muscle pain, fibromyalgia, and limb pain, skin cyst, thoracic spine disorders and upper respiratory infection (URI) among the conditions Dr. Master treats.
Internists near Dr. Master
Counts of internists 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. Ramona Master billed Medicare for 449 services in 2022
CMS data shows 449 Medicare services from Dr. Master across 11 procedure codes in 2022. Medicare paid $45,354 for them. Every service was in an office.
Dr. Master's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 2622022: 28910%
- Other services
- 2021: 1512022: 11822%
- Tests and treatments
- 2021: 262022: 4262%
- Surgery
- 2021: 442022: 0100%
Dr. Master compared with the California median for internists, 2022
- Dr. Master
- California median
- Medicare services
- 449vs 36124% above
- Part D claims
- 380vs 42110% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Master's most billed Medicare procedure codes, 2022
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. Master?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Master and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ramona Master's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Master's median patient age at 69, with 71% women.
Dr. Master's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women71%
- Men26%
Source: Dmand AI Patient Panel Data
Dr. Ramona Master wrote 733 Medicare Part D claims in 2024
In 2024, Dr. Master wrote 733 Medicare Part D claims for 50 patients. 82% of them were for generic drugs. CMS names the drug for 380 of them, across 21 drugs with 11 or more claims each, at $63,055 in total drug cost. In 2023, CMS named 348 claims across 19 drugs.
Dr. Master's Part D claims by kind of drug, 2024
- Generic600 claims82%
- Brand-name and other133 claims18%
Dr. Master'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. Master's Part D claims, 2024
- Opioids4%31 of 733 claims
- Antibiotics4%30 of 733 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: 3482024: 3809%
Drugs named by CMS: 21 in 2024, 19 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. Ramona Master received $1,008 in industry payments from 2016 to 2025
CMS Open Payments shows 23 general payments to Dr. Master from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Cleerly, Inc. paid the most, $175.
General payments to Dr. Master by program year, 2016 to 2025
Companies that paid Dr. Master 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. Ramona Master has 1 award and honors on record
Dmand AI lists 1 award for Dr. Master, most recently Top Doc San Diego 2013, 2015, 2018, 2020, 2022, 2024 in 2024.
Awards and honors for Dr. Master
- 2024
- Top Doc San Diego 2013, 2015, 2018, 2020, 2022, 2024
Source: Dmand AI Professional Profile Data
Dr. Ramona Master graduated from Feinberg School of Medicine
Dr. Master graduated from Feinberg School of Medicine in 1994. Dr. Master is a member of ACP and AMWA.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Ramona Master accepts plans from 2 insurance carriers
Dr. Master is in network with 2 carriers, including Blue Cross Blue Shield of Michigan and Elevance. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Elevance
Plan types Dr. Master accepts, by number of carriers
- HMO2
- Medicaid1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ramona Master'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 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. Ramona Master
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. Ramona Master's NPI number?
Dr. Ramona Master's NPI number is 1851429617. It was assigned on March 1, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ramona Master?
Dr. Ramona Master is an internist in San Diego, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ramona Master practice?
Dr. Master practices at 200 W Arbor Dr, San Diego, CA 92103. Dr. Master's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dmand AI also links Dr. Master to 1 group practice or clinic and 1 medical group.
What is Dr. Ramona Master's office phone number?
The practice phone on file for Dr. Master is (619) 543-6060.
What is Dr. Ramona Master's medical license number?
Dr. Master's California license number on file is A55108, one of the licenses on file in 2 states.
Which states has Dr. Ramona Master been licensed in?
Dmand AI has state licenses on file for Dr. Master in California (1995 to 2025) and Illinois (2003 to 2008).
Which hospitals is Dr. Ramona Master affiliated with?
Dr. Master is affiliated with Hillcrest Medical Center.
What medical group is Dr. Ramona Master part of?
Dr. Master is linked to UC San Diego Health. Dmand AI links Dr. Master to 1 more medical group.
Does Dr. Ramona Master accept Medicare?
Yes. CMS data shows Dr. Master billed Medicare for 449 services in 2022.
Is Dr. Ramona Master board certified?
Yes. Dr. Master is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Ramona Master bill to Medicare?
In 2022, Dr. Master's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99215).
Where did Dr. Ramona Master go to medical school?
Dr. Master graduated from Feinberg School of Medicine in 1994.
What drugs does Dr. Ramona Master prescribe most?
In 2024 Medicare Part D data, Dr. Master's most prescribed drugs by claims were Rosuvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Dr. Ramona Master received payments from drug or device companies?
CMS Open Payments shows $1,008 in general payments to Dr. Master from 14 companies from 2016 to 2025. The largest total came from Cleerly, Inc.
How long has Dr. Ramona Master been practicing?
Dr. Master graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Ramona Master accept?
Dr. Master is in network with 2 carriers, including Blue Cross Blue Shield of Michigan and Elevance. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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