Michael S. Kaplan, DO
Internal Medicine Physician · Smithtown, NY
Michael S. Kaplan, DO is an internal medicine physician with a practice address in Smithtown, New York, and NPI 1841298593, issued on Jul 7, 2005. Check the license (New York 208149, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Michael S. Kaplan
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 208149 NY
Self-reported in NPPES; status is on the state search - Practice location
- 329 E Main St, Smithtown, NY 11787
- Phone
- (631) 366-2333
- Enumerated
- Jul 7, 2005
- Record last updated
- Jul 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (631) 366-1211
- Medicaid ID
- 01916605 NY
- Medicare enrollment
- Enrolled (PECOS I20061102000360); may accept Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 329 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 Michael S. Kaplan 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 208149Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
607 Medicare Part D claims for 75 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Mounjaro209 claims
- Metformin Hcl159 claims
- Ozempic37 claims
- Bupropion Hcl Sr20 claims
- Topiramate19 claims
- Atorvastatin Calcium12 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: $83,754.57
137 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Dr Michael Kaplan DO PCSmithtown, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael S. Kaplan among 12,067 internal medicine physician records in New York
Michael S. Kaplan, DO 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1996 · median 2002 among the 7,221 with a school on file
- Record last updated2007 · 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).
36 internal medicine physician records list a practice address in Smithtown
They are 36 of the 1,907 NPPES records with a practice address in Smithtown, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Smithtown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michele Becker-Hamou, MDSmithtown, NY 117871700843067
- Deborah Blenner, M.D.Smithtown, NY 117871366497927
- Dara Brener, MDSmithtown, NY 117871750362695
- Paul Caiati, MDSmithtown, NY 117871063407898
- Joseph Calandrino, M.D.Smithtown, NY 117871962400796
- Neena Chaudhari, M.D.Smithtown, NY 117871811932890
- Vasilios Kalonaros, M.D.Smithtown, NY 117871376501296
- Mickel Khlat, DOSmithtown, NY 117871548288954
Common questions
What is Michael S. Kaplan, DO's NPI number?
Michael S. Kaplan, DO's National Provider Identifier (NPI) is 1841298593, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Kaplan, DO located?
The NPPES record lists a practice address at 329 E Main St, Smithtown, NY, 11787. Phone: (631) 366-2333. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Kaplan, DO's license?
NPPES lists New York license number 208149, 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 Michael S. Kaplan, DO prescribe under Medicare Part D?
In 2024, Michael S. Kaplan, DO had 607 Medicare Part D claims for 75 beneficiaries; 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.