Dr. Mark Kevin Horowitz, DO
- Medicare services, 2024
- 634
- Medicare patients, 2024
- 220
- Part D claims, 2024
- 229
- MIPS score, 2024
- 85
- Industry payments
- $4,334
- Practice address
- 23550 Hawthorne Blvd Suite 200 Suite 200, Torrance, CA 90505-4722
- Practice phone
- Call (310) 373-2636
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
West Dermatology - Torrance
Dermatology practice · Torrance, California
Find Dr. Horowitz's professional email, personal email and mobile number
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Dr. Mark Kevin Horowitz is a dermatologist in Torrance, California
Dr. Horowitz practices at West Dermatology - Torrance in Torrance, California.
Dr. Horowitz's NPI, 1669413878, was assigned on June 9, 2006. Dr. Horowitz holds California license 20A7642.
- NPI
- 1669413878NPI Registry (opens in a new tab)
- NPI enumeration date
- June 9, 2006
- NPI status
- Active
- Practice phone
- (310) 373-2636
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Kevin Horowitz practices at West Dermatology - Torrance in Torrance, California
Dr. Horowitz's primary practice is West Dermatology - Torrance, at 23550 Hawthorne Blvd Suite 200 Suite 200, Torrance, CA 90505-4722. The practice phone is (310) 373-2636.
- West Dermatology - Torrance23550 Hawthorne Blvd Suite 200 Suite 200, Torrance, CA 90505-4722Phone(310) 373-2636
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Kevin Horowitz is affiliated with 2 sites of care and 2 medical groups
Dr. Horowitz's primary practice is West Dermatology - Torrance in Torrance, California. The medical group on file is West Dermatology. Dmand AI also links Dr. Horowitz to 1 more group practice or clinic and 1 medical group, each 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. Mark Kevin 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 |
|---|---|
| West Dermatology - Torrance | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Kevin Horowitz is one of 1,910 dermatologists in California
Dermatology is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Horowitz is licensed in California.
Specialties and state licenses
- Dermatology, CaliforniaPrimary
Dermatologists near Dr. Horowitz
Counts of dermatologists 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. Mark Kevin Horowitz billed Medicare for 634 services in 2024
CMS data shows 634 Medicare services from Dr. Horowitz across 5 procedure codes in 2024, for 220 Medicare patients. Medicare paid $19,255 for them. Every service was in an office.
Dr. Horowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2,1192024: 43480%
- Office and hospital visits
- 2023: 1,0102024: 20080%
- Imaging
- 2023: 3012024: 0100%
- Other services
- 2023: 4182024: 0100%
Dr. Horowitz compared with the California median for dermatologists, 2024
- Dr. Horowitz
- California median
- Medicare services
- 634vs 1,75064% below
- Medicare patients
- 220vs 37742% below
- Part D claims
- 152vs 36759% below
Medians across 1,831 dermatologists 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Kevin Horowitz treated 220 Medicare patients in 2024, average age 76
CMS counts 220 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 65 to 74, with 116 patients. 75% of them have high cholesterol, and 70% have high blood pressure. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 67, with 52% women.
Dr. Horowitz's Medicare patients by age, 2024
Dr. Horowitz's Medicare patients by sex, 2024
- Women8840%
- Men13260%
Chronic conditions among Dr. Horowitz's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis35%
- Diabetes25%
- Chronic kidney disease23%
- Ischemic heart disease20%
- Osteoporosis19%
- Anxiety15%
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 67
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Kevin Horowitz wrote 229 Medicare Part D claims in 2024
In 2024, Dr. Horowitz wrote 229 Medicare Part D claims for 100 patients. 97% of them were for generic drugs. CMS names the drug for 152 of them, across 6 drugs with 11 or more claims each, at $3,309 in total drug cost. In 2023, CMS named 356 claims across 11 drugs.
Dr. Horowitz's Part D claims by kind of drug, 2024
- Generic223 claims97%
- Brand-name and other6 claims3%
Dr. Horowitz'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3562024: 15257%
Drugs named by CMS: 6 in 2024, 11 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
Dr. Mark Kevin Horowitz scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Horowitz for performance year 2024, reported as part of a group.
Dr. Horowitz's MIPS scores, performance year 2024
- 85of 100Final score
- 74.5of 100Quality
- 92of 100Promoting Interoperability
- 40of 100Improvement Activities
- 83of 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
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Dr. Mark Kevin Horowitz received $4,334 in industry payments from 2016 to 2025
CMS Open Payments shows 209 general payments to Dr. Horowitz from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Almirall LLC paid the most, $658.
General payments to Dr. Horowitz by program year, 2016 to 2025
General payments to Dr. Horowitz by kind, 2016 to 2025
- Food and beverage$4,23398%
- Education$1012%
Companies that paid Dr. Horowitz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Kevin Horowitz's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Kevin 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. Mark Kevin Horowitz's NPI number?
Dr. Mark Kevin Horowitz's NPI number is 1669413878. It was assigned on June 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Kevin Horowitz?
Dr. Mark Kevin Horowitz is a dermatologist in Torrance, California. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Mark Kevin Horowitz practice?
Dr. Horowitz practices at 23550 Hawthorne Blvd Suite 200 Suite 200, Torrance, CA 90505-4722. Dr. Horowitz's primary practice is West Dermatology - Torrance in Torrance, California. Dmand AI also links Dr. Horowitz to 1 group practice or clinic and 1 medical group.
What is Dr. Mark Kevin Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (310) 373-2636.
What is Dr. Mark Kevin Horowitz's medical license number?
Dr. Horowitz holds California license 20A7642.
What medical group is Dr. Mark Kevin Horowitz part of?
Dr. Horowitz is linked to West Dermatology. Dmand AI links Dr. Horowitz to 1 more medical group.
Does Dr. Mark Kevin Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 634 services in 2024.
What is Dr. Mark Kevin Horowitz's MIPS score?
Dr. Horowitz's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Dr. Mark Kevin Horowitz see?
CMS counts 220 Medicare patients who saw Dr. Horowitz in 2024, with an average age of 76.
What services does Dr. Mark Kevin Horowitz bill to Medicare?
In 2024, Dr. Horowitz's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
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What drugs does Dr. Mark Kevin Horowitz prescribe most?
In 2024 Medicare Part D data, Dr. Horowitz's most prescribed drugs by claims were Triamcinolone Acetonide, Ketoconazole and Ciclopirox.
Has Dr. Mark Kevin Horowitz received payments from drug or device companies?
CMS Open Payments shows $4,334 in general payments to Dr. Horowitz from 32 companies from 2016 to 2025. The largest total came from Almirall LLC.
How long has Dr. Mark Kevin Horowitz been practicing?
Dr. Horowitz graduated from medical school in 1996, 30 years ago.
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