William J. Sonstein, M.D.
Specialist · Rockville Centre, NY
William J. Sonstein, M.D. is a specialist with a practice address in Rockville Centre, New York, and NPI 1669495305, issued on Jul 25, 2006. Check the license (New York 195202-2, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William J. Sonstein
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 195202-2 NY
Self-reported in NPPES; status is on the state search - Practice location
- 100 Merrick RD, Rockville Centre, NY 11570
- Phone
- (516) 255-9031
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (516) 255-6230
- Medicaid ID
- 01827870 NY
- Medicare enrollment
- Enrolled (PECOS I20070626000763); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest specialist records → All 22,636 in New York → Look up another NPI →
Also registered at 100 Merrick RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Brisman, M.D.Specialist1255355475
- Jeffrey Brown, M.D.Specialist1558384297
- Vladimir Dadashev, MDNeurological Surgery Physician1366626277
- Nicole Ferrantelli, PASurgical Physician Assistant1912158809
- Bari Lawner, LCSWClinical Social Worker1811539364
- Robert Mascarelli, PHYSICIAN ASSISTANTSurgical Physician Assistant1932145687
Verify William J. Sonstein 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 195202-2Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average specialist in 2024
68 Medicare Part D claims for 44 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.
Most prescribed
- Gabapentin23 claims
- Methylprednisolone14 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: $307.56
6 payments; by number, the most common kind was food and beverage; the largest payer was Djo, LLC. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Bills Medicare through one group practice
- Neurological Surgery Practice OF Long Island PLLCRockville Centre, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William J. Sonstein among 22,636 specialist records in New York
William J. Sonstein, 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 92% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 4% of these records are
- Graduated1991 · median 1990 among the 943 with a school on file
- Record last updated2007 · 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 William J. Sonstein, M.D.'s NPI number?
William J. Sonstein, M.D.'s National Provider Identifier (NPI) is 1669495305, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Sonstein, M.D. located?
The NPPES record lists a practice address at 100 Merrick RD, Rockville Centre, NY, 11570. Phone: (516) 255-9031. Providers update this record themselves, so call before visiting.
How can I verify William J. Sonstein, M.D.'s license?
NPPES lists New York license number 195202-2, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does William J. Sonstein, M.D. prescribe under Medicare Part D?
In 2024, William J. Sonstein, M.D. had 68 Medicare Part D claims for 44 beneficiaries; 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.