Rosemarie Bustos Diaz
- Medicare services, 2024
- 320
- Medicare patients, 2024
- 315
- Part D claims, 2024
- 98
- Publications
- 3
- MIPS score, 2024
- 100
- Practice address
- 1250 16th Street, Santa Monica, CA 90404
- Practice phone
- Call (310) 319-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Rosemarie Diaz'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.
Rosemarie Bustos Diaz is an emergency medicine physician in Santa Monica, California
Rosemarie Diaz practices at UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health.
Rosemarie Diaz's NPI, 1215317441, was assigned on June 3, 2015. Rosemarie Diaz graduated from UC Davis School of Medicine in 2017. Rosemarie Diaz holds California license A171845.
- NPI
- 1215317441NPI Registry (opens in a new tab)
- NPI enumeration date
- June 3, 2015
- NPI status
- Active
- Practice phone
- (310) 319-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Rosemarie Bustos Diaz practices at UCLA Santa Monica Medical Center in Santa Monica, California
Rosemarie Diaz's primary practice is UCLA Santa Monica Medical Center, at 1250 16th Street, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 319-4000.
- UCLA Santa Monica Medical Center1250 16th Street, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 319-4000
Source: Dmand AI Affiliation Data
Rosemarie Bustos Diaz is affiliated with 2 sites of care and 4 medical groups
Rosemarie Diaz's primary practice is UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health. The medical group on file is Harbor-UCLA Medical Center. Dmand AI also links Rosemarie Diaz to 3 more medical groups and 1 community health center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Rosemarie Bustos Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Rosemarie Diaz practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCLA Santa Monica Medical Center | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across University of California Health and 6.2K+ hospitals, with verified contacts in the same login.
Rosemarie Bustos Diaz is one of 7,423 emergency medicine physicians in California
Emergency medicine is Rosemarie Diaz's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Rosemarie Diaz is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Rosemarie Diaz's licenses on file in 2 states: California and Michigan.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Michigan license
Emergency medicine physicians near Rosemarie Diaz
Counts of emergency medicine physicians 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
Rosemarie Bustos Diaz billed Medicare for 320 services in 2024
CMS data shows 320 Medicare services from Rosemarie Diaz across 4 procedure codes in 2024, for 315 Medicare patients. Medicare paid $36,833 for them. Every service was in a facility, such as a hospital, rather than an office.
Rosemarie Diaz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1992024: 32061%
Rosemarie Diaz compared with the California median for emergency medicine physicians, 2024
- Rosemarie Diaz
- California median
- Medicare services
- 320vs 26521% above
- Medicare patients
- 315vs 24330% above
- Part D claims
- 16vs 6274% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Rosemarie Diaz'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.
Need commercial claims for Rosemarie Diaz?
Medicare shows one payer. Book a meeting to get commercial claims data for Rosemarie Diaz and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Rosemarie Bustos Diaz treated 315 Medicare patients in 2024, average age 75
CMS counts 315 Medicare patients who saw Rosemarie Diaz in 2024. The largest group is 75 to 84, with 106 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 2.50, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Rosemarie Diaz's median patient age at 42, with 50% women.
Rosemarie Diaz's Medicare patients by age, 2024
Rosemarie Diaz's Medicare patients by sex, 2024
- Women16051%
- Men15549%
Chronic conditions among Rosemarie Diaz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease45%
- Diabetes42%
- Mood disorders42%
- Anxiety41%
- Chronic kidney disease41%
Share of Medicare patients with each condition. A patient can have several.
Rosemarie Diaz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Rosemarie Bustos Diaz wrote 98 Medicare Part D claims in 2024
In 2024, Rosemarie Diaz wrote 98 Medicare Part D claims for 73 patients. 94% of them were for generic drugs. CMS names the drug for 16 of them, across 1 drug with 11 or more claims each, at $57 in total drug cost.
Rosemarie Diaz's Part D claims by kind of drug, 2024
- Generic92 claims94%
- Brand-name and other6 claims6%
Rosemarie Diaz'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 Rosemarie Diaz's Part D claims, 2024
- Antibiotics38%37 of 98 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
Rosemarie Bustos Diaz scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Rosemarie Diaz for performance year 2024, reported as part of a group.
Rosemarie Diaz's MIPS scores, performance year 2024
- 100of 100Final score
- 93.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 80of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Rosemarie Bustos Diaz has 3 publications on record
Dmand AI links 3 papers to Rosemarie Diaz, published from 2024 to 2025. 2025 was the busiest year, with 2. Rosemarie Diaz has published most often in AEM Educ Train. Rosemarie Diaz's most frequent co-authors are Tanesha S. Beckford, MD, John Christian Burkhardt, MD and Meta Carroll, MD.
Rosemarie Diaz's most frequent co-authors
- Tanesha S. Beckford, MD1 shared paper
- John Christian Burkhardt, MD1 shared paper
- Meta Carroll, MD1 shared paper
Recent publications by Rosemarie Diaz
See who Rosemarie Diaz researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Rosemarie Diaz works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Rosemarie Bustos Diaz graduated from UC Davis School of Medicine
Rosemarie Diaz graduated from UC Davis School of Medicine in 2017.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Sources for Rosemarie Bustos Diaz'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 | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Rosemarie Bustos Diaz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Rosemarie Bustos Diaz's NPI number?
Rosemarie Bustos Diaz's NPI number is 1215317441. It was assigned on June 3, 2015, and it is active in the NPI Registry.
What does Rosemarie Bustos Diaz specialize in?
Rosemarie Bustos Diaz is an emergency medicine physician in Santa Monica, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Rosemarie Bustos Diaz practice?
Rosemarie Diaz practices at 1250 16th Street, Santa Monica, CA 90404. Rosemarie Diaz's primary practice is UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health. Dmand AI also links Rosemarie Diaz to 3 medical groups and 1 community health center.
What is Rosemarie Bustos Diaz's office phone number?
The practice phone on file for Rosemarie Diaz is (310) 319-4000.
What is Rosemarie Bustos Diaz's medical license number?
Rosemarie Diaz holds California license A171845, one of the licenses on file in 2 states.
Which states has Rosemarie Bustos Diaz been licensed in?
Dmand AI has state licenses on file for Rosemarie Diaz in California (2021 to 2027) and Michigan (2019 to 2021).
Which hospitals is Rosemarie Bustos Diaz affiliated with?
Rosemarie Diaz practices at UCLA Santa Monica Medical Center in Santa Monica, California.
What medical group is Rosemarie Bustos Diaz part of?
Rosemarie Diaz is linked to Harbor-UCLA Medical Center. Dmand AI links Rosemarie Diaz to 3 more medical groups.
Does Rosemarie Bustos Diaz accept Medicare?
Yes. CMS data shows Rosemarie Diaz billed Medicare for 320 services in 2024.
What is Rosemarie Bustos Diaz's MIPS score?
Rosemarie Diaz's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Rosemarie Bustos Diaz see?
CMS counts 315 Medicare patients who saw Rosemarie Diaz in 2024, with an average age of 75.
Is Rosemarie Bustos Diaz board certified?
Yes. Rosemarie Diaz is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Rosemarie Bustos Diaz bill to Medicare?
In 2024, Rosemarie Diaz's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
Where did Rosemarie Bustos Diaz go to medical school?
Rosemarie Diaz graduated from UC Davis School of Medicine in 2017.
What drugs does Rosemarie Bustos Diaz prescribe most?
In 2024 Medicare Part D data, Rosemarie Diaz's most prescribed drugs by claims were Cephalexin.
How long has Rosemarie Bustos Diaz been practicing?
Rosemarie Diaz graduated from medical school in 2017, 9 years ago.
Does Rosemarie Bustos Diaz do research?
Dmand AI links 3 publications to Rosemarie Diaz, published from 2024 to 2025.
Who does Rosemarie Bustos Diaz publish with?
Rosemarie Diaz's most frequent co-authors are Tanesha S. Beckford, MD (1 shared paper), John Christian Burkhardt, MD (1 shared paper) and Meta Carroll, MD (1 shared paper).
Selling to emergency medicine practices?
See emergency medicine physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card