Mark William Ornstein, M.D.
Internal Medicine Physician · Farmingdale, NJ
Mark William Ornstein, M.D. is an internal medicine physician with a practice address in Farmingdale, New Jersey, and NPI 1912089681, issued on Oct 20, 2006. Check the license (New Jersey 25MA04828700, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark William Ornstein
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25MA04828700 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 43 Main St, Farmingdale, NJ 07727
- Phone
- (732) 449-0914
- Enumerated
- Oct 20, 2006
- Record last updated
- Apr 26, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (732) 449-5437
- Entity
- Type 1 · individual
Also registered at 43 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark William Ornstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA04828700Check 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
11 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.
5 internal medicine physician records list a practice address in Farmingdale
They are 5 of the 53 NPPES records with a practice address in Farmingdale, and 4,632 internal medicine physician records in New Jersey.
All 5 in Farmingdale → All 4,632 in New Jersey → Every provider in Farmingdale →
Other internal medicine physician records in New Jersey
- Joseph Aaron, MD, FACPShort Hills, NJ1861584633
- Sirike Aasmaa, DOMontville, NJ1861549925
- Holly Abate Bersalona, M.D.Sea Girt, NJ1669500492
- Kaniz Zehra Abbas, MDTrenton, NJ1598253858
- Shahida Abbas, MDOld Bridge, NJ1023104098
- Shahed AbbasiNewark, NJ1477810752
- Samih Abbassi, MDWest Orange, NJ1750380358
- Somaya Abboud, MDWest Orange, NJ1326089004
- Hilal Abboushi, MDBloomfield, NJ1548378029
- Anthony Abbruzzi, D.O.Pleasantville, NJ1629034905
Common questions
What is Mark William Ornstein, M.D.'s NPI number?
Mark William Ornstein, M.D.'s National Provider Identifier (NPI) is 1912089681, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark William Ornstein, M.D. located?
The NPPES record lists a practice address at 43 Main St, Farmingdale, NJ, 07727. Phone: (732) 449-0914. Providers update this record themselves, so call before visiting.
How can I verify Mark William Ornstein, M.D.'s license?
NPPES lists New Jersey license number 25MA04828700, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark William Ornstein, M.D. prescribe under Medicare Part D?
In 2024, Mark William Ornstein, M.D. had 11 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.