Nicholas John Kleopoulos M.d., MD
Obstetrics & Gynecology Physician · Smithtown, NY
Nicholas John Kleopoulos M.d., MD is an obstetrics & gynecology physician with a practice address in Smithtown, New York, and NPI 1730248659, issued on Dec 6, 2006. Check the license (New York 149194, as entered in NPPES) on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Nicholas John Kleopoulos M.d.
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 149194 NY
Self-reported in NPPES; status is on the state search - Practice location
- 200 E Main St, Smithtown, NY 11787
- Phone
- (631) 265-4567
- Enumerated
- Dec 6, 2006
- Record last updated
- Oct 29, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (631) 265-4704
- Entity
- Type 1 · individual
Also registered at 200 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nicholas John Kleopoulos M.d. 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 149194Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Obstetrics & Gynecology Physician providers in New York
There are 3,174 obstetrics & gynecology physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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Common questions
What is Nicholas John Kleopoulos M.d., MD's NPI number?
Nicholas John Kleopoulos M.d., MD's National Provider Identifier (NPI) is 1730248659, issued on Dec 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas John Kleopoulos M.d., MD located?
The NPPES record lists a practice address at 200 E Main St, Smithtown, NY, 11787. Phone: (631) 265-4567. Providers update this record themselves, so call before visiting.
How can I verify Nicholas John Kleopoulos M.d., MD's license?
NPPES lists New York license number 149194, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.