Margaret Rozy Horlick, M.D.
Internal Medicine Physician · New York, NY
Margaret Rozy Horlick, M.D. is an internal medicine physician with a practice address in New York, New York, and NPI 1134329857, issued on Jul 20, 2007. Check the license (New York 247045, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Margaret Rozy Horlick
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 247045 NY
Self-reported in NPPES; status is on the state search - Practice location
- 423 E 23RD St, New York, NY 10010
- Phone
- (212) 686-7500
- Enumerated
- Jul 20, 2007
- Record last updated
- Jul 8, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 423 E 23RD St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Rozy Horlick 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 247045Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
27 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Margaret Rozy Horlick among 12,067 internal medicine physician records in New York
Margaret Rozy Horlick, 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 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 fileNo · 60% of these records are
- Record last updated2008 · 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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Common questions
What is Margaret Rozy Horlick, M.D.'s NPI number?
Margaret Rozy Horlick, M.D.'s National Provider Identifier (NPI) is 1134329857, issued on Jul 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Rozy Horlick, M.D. located?
The NPPES record lists a practice address at 423 E 23RD St, New York, NY, 10010. Phone: (212) 686-7500. Providers update this record themselves, so call before visiting.
How can I verify Margaret Rozy Horlick, M.D.'s license?
NPPES lists New York license number 247045, 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 Margaret Rozy Horlick, M.D. prescribe under Medicare Part D?
In 2024, Margaret Rozy Horlick, M.D. had 27 Medicare Part D claims; 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.