Dr. Michael J. Horowitz, MD
- Medicare services, 2024
- 2,726
- Medicare patients, 2024
- 2,261
- Publications
- 5
- MIPS score, 2024
- 91
- Hospital affiliations
- 2
- Practice address
- 200 W Arbor Dr, San Diego, CA 92103
- Practice phone
- Call (619) 543-6222
- 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. Horowitz'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. Michael J. Horowitz is a diagnostic radiologist in San Diego, California
Dr. Horowitz practices at UCSD Hillcrest Medical Center in San Diego, California.
Dr. Horowitz's NPI, 1518306851, was assigned on June 20, 2013. Dr. Horowitz graduated from University of Connecticut School of Medicine in 2013. Dr. Horowitz holds California license A135132.
- NPI
- 1518306851NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133475783
- NPI enumeration date
- June 20, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 543-6222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael J. Horowitz practices at UCSD Hillcrest Medical Center in San Diego, California
Dr. Horowitz'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) 543-6222.
- UCSD Hillcrest Medical Center200 W Arbor Dr, San Diego, CA 92103 · San Diego CountyPhone(619) 543-6222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael J. Horowitz is affiliated with 3 sites of care and 1 medical group
Dr. Horowitz's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Horowitz is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health. Dmand AI also links Dr. Horowitz to 1 more hospital, 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. Michael J. Horowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz 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 affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael J. Horowitz is one of 4,096 diagnostic radiologists in California
Diagnostic radiology is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Horowitz is board certified in diagnostic radiology by the American Board of Radiology. Dr. Horowitz is licensed in California.
Specialties and state licenses
- Diagnostic radiology, CaliforniaPrimary
Diagnostic radiologists near Dr. Horowitz
Counts of diagnostic radiologists 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. Michael J. Horowitz billed Medicare for 2,726 services in 2024
CMS data shows 2,726 Medicare services from Dr. Horowitz across 10 procedure codes in 2024, for 2,261 Medicare patients. Medicare paid $81,119 for them.
Dr. Horowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 3,0402024: 2,72610%
Where Dr. Horowitz's Medicare services took place, 2024
- In an office26910%
- In a facility2,45790%
Dr. Horowitz compared with the California median for diagnostic radiologists, 2024
- Dr. Horowitz
- California median
- Medicare services
- 2,726vs 2,28120% above
- Medicare patients
- 2,261vs 1,34668% above
Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.
Dr. Horowitz'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horowitz and other diagnostic radiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael J. Horowitz treated 2,261 Medicare patients in 2024, average age 73
CMS counts 2,261 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 65 to 74, with 973 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 33% are also on Medicaid. Their average risk score is 2.39, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 62, with 48% women.
Dr. Horowitz's Medicare patients by age, 2024
Dr. Horowitz's Medicare patients by sex, 2024
- Women1,13050%
- Men1,13150%
Chronic conditions among Dr. Horowitz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Ischemic heart disease40%
- Mood disorders37%
- Diabetes35%
- Chronic kidney disease34%
- Cancer33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Horowitz'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
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael J. Horowitz scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Horowitz for performance year 2024, reported as part of a group. Dr. Horowitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Horowitz's MIPS scores, performance year 2024
- 91of 100Final score
- 84.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Michael J. Horowitz has 5 publications on record
Dmand AI links 5 papers to Dr. Horowitz, published from 2019 to 2024. Dr. Horowitz has published most often in Radiol Cardiothorac Imaging. Dr. Horowitz's most frequent co-authors are Albert Hsiao, MD, PhD, Laith Alshawabkeh, MD and Seth J. Kligerman, MD.
Dr. Horowitz's papers by year, 2019 to 2024
Dr. Horowitz's most frequent co-authors
- Albert Hsiao, MD, PhD3 shared papers
- Laith Alshawabkeh, MD2 shared papers
- Seth J. Kligerman, MD2 shared papers
Recent publications by Dr. Horowitz
Radiol Cardiothorac Imaging
See who Dr. Horowitz researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Horowitz works with, so you can find a warm path to the right diagnostic radiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael J. Horowitz received $23 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Horowitz from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Siemens Medical Solutions USA, Inc. paid the most, $23.
Companies that paid Dr. Horowitz the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael J. Horowitz graduated from University of Connecticut School of Medicine
Dr. Horowitz graduated from University of Connecticut School of Medicine in 2013.
- Medical school
- Board certified in diagnostic radiology
Source: Dmand AI Professional Profile Data
Dr. Michael J. Horowitz accepts plans from 6 insurance carriers
Dr. Horowitz is in network with 6 carriers, including Excellus BlueCross BlueShield, Elevance and Molina. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Elevance
- Molina
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Horowitz accepts, by number of carriers
- HMO4
- Medicare4
- POS3
- EPO2
- PPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael J. Horowitz'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 DataMedicare Physician & Other Practitioners - 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)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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Michael J. Horowitz
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. Michael J. Horowitz's NPI number?
Dr. Michael J. Horowitz's NPI number is 1518306851. It was assigned on June 20, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael J. Horowitz?
Dr. Michael J. Horowitz is a diagnostic radiologist in San Diego, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Michael J. Horowitz practice?
Dr. Horowitz practices at 200 W Arbor Dr, San Diego, CA 92103. Dr. Horowitz's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dmand AI also links Dr. Horowitz to 1 hospital.
What is Dr. Michael J. Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (619) 543-6222.
What is Dr. Michael J. Horowitz's medical license number?
Dr. Horowitz holds California license A135132.
Which hospitals is Dr. Michael J. Horowitz affiliated with?
Dr. Horowitz is affiliated with Hillcrest Medical Center. Dmand AI links Dr. Horowitz to 1 more hospital.
What medical group is Dr. Michael J. Horowitz part of?
Dr. Horowitz is linked to UC San Diego Health.
Does Dr. Michael J. Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 2,726 services in 2024, and Dr. Horowitz accepts Medicare assignment.
What is Dr. Michael J. Horowitz's MIPS score?
Dr. Horowitz's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Michael J. Horowitz see?
CMS counts 2,261 Medicare patients who saw Dr. Horowitz in 2024, with an average age of 73.
Show 8 more questionsShow fewer questions
Is Dr. Michael J. Horowitz board certified?
Yes. Dr. Horowitz is board certified in diagnostic radiology by the American Board of Radiology.
What services does Dr. Michael J. Horowitz bill to Medicare?
In 2024, Dr. Horowitz's most billed Medicare services were diagnostic imaging (71045), diagnostic imaging (71046) and diagnostic imaging (71260).
Where did Dr. Michael J. Horowitz go to medical school?
Dr. Horowitz graduated from University of Connecticut School of Medicine in 2013.
Has Dr. Michael J. Horowitz received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Dr. Horowitz from 1 company from 2021 to 2021. The largest total came from Siemens Medical Solutions USA, Inc.
How long has Dr. Michael J. Horowitz been practicing?
Dr. Horowitz graduated from medical school in 2013, 13 years ago.
Does Dr. Michael J. Horowitz do research?
Dmand AI links 5 publications to Dr. Horowitz, published from 2019 to 2024.
Who does Dr. Michael J. Horowitz publish with?
Dr. Horowitz's most frequent co-authors are Albert Hsiao, MD, PhD (3 shared papers), Laith Alshawabkeh, MD (2 shared papers) and Seth J. Kligerman, MD (2 shared papers).
What insurance does Dr. Michael J. Horowitz accept?
Dr. Horowitz is in network with 6 carriers, including Excellus BlueCross BlueShield, Elevance and Molina. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
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