Dr. David Michael Horowitz, MD
- Medicare services, 2024
- 1,114
- Medicare patients, 2024
- 123
- Part D claims, 2024
- 1,840
- Hospital affiliations
- 1
- Industry payments
- $637
- Practice address
- 2 Brooksite Dr, Smithtown, NY 11787
- Practice phone
- Call (631) 724-4048
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
David Michael Horowitz, MD
Smithtown, New York
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. David Michael Horowitz is an internist in Smithtown, New York
Dr. Horowitz practices at David Michael Horowitz, MD in Smithtown, New York.
Dr. Horowitz's NPI, 1811901200, was assigned on July 28, 2006. Dr. Horowitz graduated from New York University Grossman School of Medicine in 1978. Dr. Horowitz holds New York license 142369.
- NPI
- 1811901200NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062458383
- NPI enumeration date
- July 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (631) 724-4048
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Michael Horowitz practices at David Michael Horowitz, MD in Smithtown, New York
Dr. Horowitz's primary practice is David Michael Horowitz, MD, at 2 Brooksite Dr, Smithtown, NY 11787 in Suffolk County. The practice phone is (631) 724-4048.
- David Michael Horowitz, MD2 Brooksite Dr, Smithtown, NY 11787 · Suffolk CountyPhone(631) 724-4048
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David Michael Horowitz is affiliated with 4 sites of care
Dr. Horowitz's primary practice is David Michael Horowitz, MD in Smithtown, New York. Dr. Horowitz is also affiliated with Stony Brook University Hospital. Dmand AI also links Dr. Horowitz to 1 more physician office and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. David Michael Horowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| David Michael Horowitz, MD | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Michael Horowitz is one of 9,643 internists in New York
Internal medicine is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Horowitz is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Dr. Horowitz
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. David Michael Horowitz billed Medicare for 1,114 services in 2024
CMS data shows 1,114 Medicare services from Dr. Horowitz across 8 procedure codes in 2024, for 123 Medicare patients. Medicare paid $102,284 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: 1,0172024: 9467%
- Tests and treatments
- 2023: 952024: 1005%
- Other services
- 2023: 342024: 4738%
- Lab and pathology
- 2023: 182024: 2117%
Dr. Horowitz compared with the New York median for internists, 2024
- Dr. Horowitz
- New York median
- Medicare services
- 1,114vs 4262.6 times
- Medicare patients
- 123vs 15822% below
- Part D claims
- 1,345vs 6222.2 times
Medians across 9,428 internists in New York 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 internists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Michael Horowitz treated 123 Medicare patients in 2024, average age 79
CMS counts 123 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 75 to 84, with 55 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.22, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 64, with 50% 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
- Women6049%
- Men6351%
Chronic conditions among Dr. Horowitz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Ischemic heart disease45%
- Anxiety33%
- Chronic kidney disease28%
- Osteoporosis28%
- Mood disorders26%
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 64
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Michael Horowitz wrote 1,840 Medicare Part D claims in 2024
In 2024, Dr. Horowitz wrote 1,840 Medicare Part D claims for 118 patients. 87% of them were for generic drugs. CMS names the drug for 1,345 of them, across 45 drugs with 11 or more claims each, at $118,708 in total drug cost. In 2023, CMS named 1,450 claims across 47 drugs.
Dr. Horowitz's Part D claims by kind of drug, 2024
- Generic1,600 claims87%
- Brand-name and other240 claims13%
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.
Drug classes CMS tracks in Dr. Horowitz's Part D claims, 2024
- Opioids1%20 of 1,840 claims
- Antibiotics2%28 of 1,840 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: 1,4502024: 1,3457%
Drugs named by CMS: 45 in 2024, 47 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. David Michael Horowitz offers telehealth to Medicare patients
Dr. Horowitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Horowitz as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. David Michael Horowitz received $637 in industry payments from 2016 to 2025
CMS Open Payments shows 18 general payments to Dr. Horowitz from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Ipsen Biopharmaceuticals, Inc paid the most, $144.
General payments to Dr. Horowitz by program year, 2016 to 2025
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
Dr. David Michael Horowitz graduated from New York University Grossman School of Medicine
Dr. Horowitz graduated from New York University Grossman School of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Michael 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 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 | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Dr. David Michael 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. David Michael Horowitz's NPI number?
Dr. David Michael Horowitz's NPI number is 1811901200. It was assigned on July 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David Michael Horowitz?
Dr. David Michael Horowitz is an internist in Smithtown, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. David Michael Horowitz practice?
Dr. Horowitz practices at 2 Brooksite Dr, Smithtown, NY 11787. Dr. Horowitz's primary practice is David Michael Horowitz, MD in Smithtown, New York. Dmand AI also links Dr. Horowitz to 1 physician office and 1 home health agency.
What is Dr. David Michael Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (631) 724-4048.
What is Dr. David Michael Horowitz's medical license number?
Dr. Horowitz holds New York license 142369.
Which hospitals is Dr. David Michael Horowitz affiliated with?
Dr. Horowitz is affiliated with Stony Brook University Hospital.
Does Dr. David Michael Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 1,114 services in 2024, and Dr. Horowitz accepts Medicare assignment.
Does Dr. David Michael Horowitz offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Horowitz as offering telehealth services.
How many Medicare patients does Dr. David Michael Horowitz see?
CMS counts 123 Medicare patients who saw Dr. Horowitz in 2024, with an average age of 79.
What services does Dr. David Michael Horowitz bill to Medicare?
In 2024, Dr. Horowitz's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, established patient (99215).
Show 4 more questionsShow fewer questions
Where did Dr. David Michael Horowitz go to medical school?
Dr. Horowitz graduated from New York University Grossman School of Medicine in 1978.
What drugs does Dr. David Michael Horowitz prescribe most?
In 2024 Medicare Part D data, Dr. Horowitz's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metoprolol Succinate.
Has Dr. David Michael Horowitz received payments from drug or device companies?
CMS Open Payments shows $637 in general payments to Dr. Horowitz from 12 companies from 2016 to 2025. The largest total came from Ipsen Biopharmaceuticals, Inc.
How long has Dr. David Michael Horowitz been practicing?
Dr. Horowitz graduated from medical school in 1978, 48 years ago.
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