Robert N. Holtzman, M.D.
Specialist · Rockville Centre, NY
Robert N. Holtzman, M.D. is a specialist with a practice address in Rockville Centre, New York, and NPI 1164571691, issued on Jan 10, 2007. Check the license (New York 106542, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert N. Holtzman
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 106542 NY
Self-reported in NPPES; status is on the state search - Practice location
- 100 Merrick Road, Rockville Centre, NY 11570
- Phone
- (516) 255-9031
- Enumerated
- Jan 10, 2007
- Record last updated
- May 2, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (516) 255-6010
- Entity
- Type 1 · individual
8 nearest specialist records → All 22,636 in New York → Look up another NPI →
Also registered at 100 Merrick Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Grant, M.D.Neurological Surgery Physician1093701278
Verify Robert N. Holtzman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 106542Check 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 specialist in 2024
15 Medicare Part D claims, against an average of 1,380 among the 8,233 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.
Robert N. Holtzman among 22,636 specialist records in New York
Robert N. Holtzman, M.D. is one of 22,636 specialist records with a practice address in New York. 6% 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 8% of them.
- NPI issued2007 · 8% of these records are older, 89% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileNo · 4% of these records are
- Record last updated2011 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
51 specialist records list a practice address in Rockville Centre
They are 51 of the 1,340 NPPES records with a practice address in Rockville Centre, and 22,636 specialist records in New York.
All 22,636 in New York → Every provider in Rockville Centre → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Michael Brisman, M.D.Rockville Centre, NY 115701255355475
- Jeffrey Brown, M.D.Rockville Centre, NY 115701558384297
- Jorge Cerruti, MDRockville Centre, NY 115701093706046
- Anthony Corso, MDRockville Centre, NY 115701790847861
- Walter Farkas, MDRockville Centre, NY 115701588762850
- Sol Farkas, M.D.Rockville Centre, NY 115701376613752
- Paul Friedmann, M.D.Rockville Centre, NY 115701336149921
- Larry Good, M.D.Rockville Centre, NY 115701437134418
Common questions
What is Robert N. Holtzman, M.D.'s NPI number?
Robert N. Holtzman, M.D.'s National Provider Identifier (NPI) is 1164571691, issued on Jan 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert N. Holtzman, M.D. located?
The NPPES record lists a practice address at 100 Merrick Road, Rockville Centre, NY, 11570. Phone: (516) 255-9031. Providers update this record themselves, so call before visiting.
How can I verify Robert N. Holtzman, M.D.'s license?
NPPES lists New York license number 106542, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Robert N. Holtzman, M.D. prescribe under Medicare Part D?
In 2024, Robert N. Holtzman, M.D. had 15 Medicare Part D claims; the average among specialist prescribers was 1,380. 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.