Leora Idit Horwitz, M.D., M.H.S.
Internal Medicine Physician · New York, NY
Leora Idit Horwitz, M.D., M.H.S. is an internal medicine physician with a practice address in New York, New York, and NPI 1841334810, issued on Feb 16, 2007. Check the license (New York 221998, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Leora Idit Horwitz
- Credential
- M.D., M.H.S.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 221998 NY
042642 CT
Self-reported in NPPES; status is on the state search - Practice location
- 550 1St Ave, New York, NY 10016
- Phone
- (646) 501-2685
- Enumerated
- Feb 16, 2007
- Record last updated
- Oct 9, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (646) 501-2706
- Medicare enrollment
- Enrolled (PECOS I20150311000964); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2000
- Entity
- Type 1 · individual
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Also registered at 550 1St Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leora Idit Horwitz 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 221998Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
13 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leora Idit Horwitz among 12,067 internal medicine physician records in New York
Leora Idit Horwitz, M.D., M.H.S. 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 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2000 · median 2002 among the 7,221 with a school on file
- Record last updated2014 · 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).
2,434 internal medicine physician records list a practice address in New York
They are 2,434 of the 98,468 NPPES records with a practice address in New York, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in New York → Internal Medicine Physician nationwide →
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- Joseph Devito, MDNew York, NY 100161154329514
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- Michael Glasser, MDNew York, NY 100161164421947
Common questions
What is Leora Idit Horwitz, M.D., M.H.S.'s NPI number?
Leora Idit Horwitz, M.D., M.H.S.'s National Provider Identifier (NPI) is 1841334810, issued on Feb 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leora Idit Horwitz, M.D., M.H.S. located?
The NPPES record lists a practice address at 550 1St Ave, New York, NY, 10016. Phone: (646) 501-2685. Providers update this record themselves, so call before visiting.
How can I verify Leora Idit Horwitz, M.D., M.H.S.'s license?
NPPES lists New York license number 221998, 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 Leora Idit Horwitz, M.D., M.H.S. prescribe under Medicare Part D?
In 2024, Leora Idit Horwitz, M.D., M.H.S. had 13 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Leora Idit Horwitz, M.D., M.H.S.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.