Leonard Horowitz, M.D.
Family Medicine Physician · Danvers, MA
Leonard Horowitz, M.D. is a family medicine physician with a practice address in Danvers, Massachusetts, and NPI 1649265844, issued on Sep 13, 2005. Check the license on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Leonard Horowitz
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- Practice location
- 7 Federal St, Danvers, MA 01923
- Phone
- (978) 777-8553
- Enumerated
- Sep 13, 2005
- Entity
- Type 1 · individual
Also registered at 7 Federal St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leonard Horowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
136 Medicare Part D claims for 26 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D.
Most prescribed
- Zolpidem Tartrate13 claims
- Lorazepam11 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: $17.12
1 payment, mostly food and beverage; the largest payer was Inspire Medical Systems, Inc.. The 53,013 providers of this specialty with any payment received $861.30 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.
Family Medicine Physician providers in Massachusetts
There are 2,226 family medicine physician records in Massachusetts.
Other family medicine physician records in Massachusetts
- Salah Abass, M.D.Methuen, MA1417959776
- Sheila Abdallah, MDWorcester, MA1821356312
- Jonathan Abel, DOSpringfield, MA1700897196
- Mohamed Abib, MDSturbridge, MA1639281090
- Kevin Abraham, M.D.Worcester, MA1689037673
- Janet Abrahamian, M.D.West Boylston, MA1932156627
- John Abramson, M.D.Ipswich, MA1275613903
- John Paul Abroguena, MDPlainville, MA1235361080
- Aliza Acker-Bernstein, M.D.Peabody, MA1023057551
- Lisa Adams, MDFalmouth, MA1235404336
Common questions
What is Leonard Horowitz, M.D.'s NPI number?
Leonard Horowitz, M.D.'s National Provider Identifier (NPI) is 1649265844, issued on Sep 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Horowitz, M.D. located?
The NPPES record lists a practice address at 7 Federal St, Danvers, MA, 01923. Phone: (978) 777-8553. Providers update this record themselves, so call before visiting.
How can I verify Leonard Horowitz, M.D.'s license?
Search the Massachusetts Board of Registration in Medicine at https://www.mass.gov/orgs/board-of-registration-in-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leonard Horowitz, M.D. prescribe under Medicare Part D?
In 2024, Leonard Horowitz, M.D. had 136 Medicare Part D claims for 26 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.