David Michael Horowitz, M.D.
Internal Medicine Physician · Smithtown, NY
David Michael Horowitz, M.D. is an internal medicine physician with a practice address in Smithtown, New York, and NPI 1811901200, issued on Jul 28, 2006. Check the license (New York 142369, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- David Michael Horowitz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 142369 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2 Brooksite Drive, Smithtown, NY 11787
- Phone
- (631) 724-4048
- Enumerated
- Jul 28, 2006
- Record last updated
- Feb 21, 2024
- Fax
- (631) 780-6899
- Medicaid IDs
- 007735973 NY
00773597-3 NY - Medicare enrollment
- Enrolled (PECOS I20110511000004); accepts Medicare assignment
- Medical or professional school
- New York University Medical College - Nlg, 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Verify David Michael Horowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 142369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,840 Medicare Part D claims for 118 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Atorvastatin Calcium148 claims
- Amlodipine Besylate125 claims
- Metoprolol Succinate71 claims
- Rosuvastatin Calcium59 claims
- Omeprazole57 claims
- Allopurinol51 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $187.91
3 payments; by number, the most common kind was food and beverage; the largest payer was Ipsen Biopharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
David Michael Horowitz among 12,067 internal medicine physician records in New York
David Michael Horowitz, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1978 · median 2002 among the 7,221 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 internal medicine physician records list a practice address in Smithtown
They are 36 of the 1,907 NPPES records with a practice address in Smithtown, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Smithtown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michele Becker-Hamou, MDSmithtown, NY 117871700843067
- Deborah Blenner, M.D.Smithtown, NY 117871366497927
- Dara Brener, MDSmithtown, NY 117871750362695
- Paul Caiati, MDSmithtown, NY 117871063407898
- Joseph Calandrino, M.D.Smithtown, NY 117871962400796
- Neena Chaudhari, M.D.Smithtown, NY 117871811932890
- Vasilios Kalonaros, M.D.Smithtown, NY 117871376501296
- Michael Kaplan, DOSmithtown, NY 117871841298593
Common questions
What is David Michael Horowitz, M.D.'s NPI number?
David Michael Horowitz, M.D.'s National Provider Identifier (NPI) is 1811901200, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Michael Horowitz, M.D. located?
The NPPES record lists a practice address at 2 Brooksite Drive, Smithtown, NY, 11787. Phone: (631) 724-4048. Providers update this record themselves, so call before visiting.
How can I verify David Michael Horowitz, M.D.'s license?
NPPES lists New York license number 142369, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Michael Horowitz, M.D. prescribe under Medicare Part D?
In 2024, David Michael Horowitz, M.D. had 1,840 Medicare Part D claims for 118 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.