Dr. Thomas Lee Horowitz, DO
- Medicare services, 2024
- 37
- Medicare patients, 2024
- 35
- Part D claims, 2024
- 251
- Industry payments
- $6,877
- Insurance carriers
- 3
- Practice address
- 1225 W Wilshire Blvd, Los Angeles, CA 90017
- Practice phone
- Call (323) 666-5550
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. Thomas Lee Horowitz is a family medicine physician in Los Angeles, California
Dr. Horowitz practices in Los Angeles, California.
Dr. Horowitz's NPI, 1538113444, was assigned on May 22, 2006. Dr. Horowitz graduated from WesternU College of Osteopathic Medicine of the Pacific in 1982. Dr. Horowitz holds California license 20A4870.
- NPI
- 1538113444NPI Registry (opens in a new tab)
- NPI enumeration date
- May 22, 2006
- NPI status
- Active
- Practice phone
- (323) 666-5550
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Thomas Lee Horowitz's practice address is in Los Angeles, California
Dr. Horowitz's practice address in the NPI Registry is 1225 W Wilshire Blvd, Los Angeles, CA 90017, in Los Angeles County. The practice phone is (323) 666-5550.
- NPI Registry address1225 W Wilshire Blvd, Los Angeles, CA 90017 · Los Angeles CountyPhone(323) 666-5550
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Thomas Lee Horowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Horowitz's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Lee Horowitz is one of 15,680 family medicine physicians in California
Family medicine is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Horowitz is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute respiratory failure, acute sinusitis, acute skin infection, anxiety, asthma, atrial fibrillation and flutter, chronic anemia and chronic diabetes among the conditions Dr. Horowitz treats.
Family medicine physicians near Dr. Horowitz
Counts of family 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
Dr. Thomas Lee Horowitz billed Medicare for 37 services in 2024
CMS data shows 37 Medicare services from Dr. Horowitz across 2 procedure codes in 2024, all of them office visits, for 35 Medicare patients. Medicare paid $1,530 for them. Every service was in an office.
Dr. Horowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2822024: 3787%
Dr. Horowitz compared with the California median for family medicine physicians, 2024
- Dr. Horowitz
- California median
- Medicare services
- 37vs 24685% below
- Medicare patients
- 35vs 11870% below
- Part D claims
- 21vs 83397% below
Medians across 15,349 family medicine physicians 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.
Need commercial claims for Dr. Horowitz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horowitz and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Lee Horowitz treated 35 Medicare patients in 2024, average age 73
CMS counts 35 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 65 to 74, with 21 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 50, with 44% women.
Dr. Horowitz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Horowitz's Medicare patients by sex, 2024
- Women1646%
- Men1954%
Chronic conditions among Dr. Horowitz's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis49%
- Anxiety43%
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 50
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Lee Horowitz wrote 251 Medicare Part D claims in 2024
In 2024, Dr. Horowitz wrote 251 Medicare Part D claims for 54 patients. 80% of them were for generic drugs. CMS names the drug for 21 of them, across 1 drug with 11 or more claims each, at $158 in total drug cost. In 2023, CMS named 478 claims across 23 drugs.
Dr. Horowitz's Part D claims by kind of drug, 2024
- Generic200 claims80%
- Brand-name and other51 claims20%
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: 4782024: 2196%
Drugs named by CMS: 1 in 2024, 23 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. Thomas Lee Horowitz received $6,877 in industry payments from 2016 to 2023
CMS Open Payments shows 59 general payments to Dr. Horowitz from 15 drug and device companies from 2016 to 2023. Consulting fees make up the largest share, 58% of the total. Gilead Sciences, Inc. paid the most, $4,478.
General payments to Dr. Horowitz by program year, 2016 to 2023
General payments to Dr. Horowitz by kind, 2016 to 2023
- Consulting fees$4,02058%
- Food and beverage$1,45521%
- Travel and lodging$95514%
- Speaker and faculty fees$3004%
- Education$1472%
Companies that paid Dr. Horowitz the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Lee Horowitz has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Horowitz, most recently Top Doctors:LA Area in 2021.
Awards and honors for Dr. Horowitz
- 2021
- Top Doctors:LA Area
- Top Doctors:Southern California
- Town & Country Magazine: Top Doctors
Source: Dmand AI Professional Profile Data
Dr. Thomas Lee Horowitz graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Horowitz graduated from WesternU College of Osteopathic Medicine of the Pacific in 1982. Dr. Horowitz is a member of AOA, California Medical Association, Los Angeles County Medical Association, Los Angeles County Osteopathic Association and Osteopathic Physicians and Surgeons of California.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Thomas Lee Horowitz accepts plans from 3 insurance carriers
Dr. Horowitz is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Regence Health Plans. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
Plan types Dr. Horowitz accepts, by number of carriers
- Medicare3
- PPO3
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas Lee 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 |
| 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) |
| 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. Thomas Lee 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. Thomas Lee Horowitz's NPI number?
Dr. Thomas Lee Horowitz's NPI number is 1538113444. It was assigned on May 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Lee Horowitz?
Dr. Thomas Lee Horowitz is a family medicine physician in Los Angeles, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Thomas Lee Horowitz practice?
Dr. Horowitz practices at 1225 W Wilshire Blvd, Los Angeles, CA 90017.
What is Dr. Thomas Lee Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (323) 666-5550.
What is Dr. Thomas Lee Horowitz's medical license number?
Dr. Horowitz holds California license 20A4870.
Does Dr. Thomas Lee Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 37 services in 2024.
How many Medicare patients does Dr. Thomas Lee Horowitz see?
CMS counts 35 Medicare patients who saw Dr. Horowitz in 2024, with an average age of 73.
What services does Dr. Thomas Lee Horowitz bill to Medicare?
In 2024, Dr. Horowitz's most billed Medicare services were office visit, established patient (99212) and office visit, established patient (99213).
Where did Dr. Thomas Lee Horowitz go to medical school?
Dr. Horowitz graduated from WesternU College of Osteopathic Medicine of the Pacific in 1982.
What drugs does Dr. Thomas Lee Horowitz prescribe most?
In 2024 Medicare Part D data, Dr. Horowitz's most prescribed drugs by claims were Amlodipine Besylate.
Show 3 more questionsShow fewer questions
Has Dr. Thomas Lee Horowitz received payments from drug or device companies?
CMS Open Payments shows $6,877 in general payments to Dr. Horowitz from 15 companies from 2016 to 2023. The largest total came from Gilead Sciences, Inc.
How long has Dr. Thomas Lee Horowitz been practicing?
Dr. Horowitz graduated from medical school in 1982, 44 years ago.
What insurance does Dr. Thomas Lee Horowitz accept?
Dr. Horowitz is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Regence Health Plans. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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