Jason Adam Klein, M.D.
Pediatric Endocrinology Physician · Commack, NY
Jason Adam Klein, M.D. is a pediatric endocrinology physician with a practice address in Commack, New York, and NPI 1033358676, issued on Feb 4, 2009. Check the license (New York 255029, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Jason Adam Klein
- Credential
- M.D.
- Primary taxonomy
- Pediatric Endocrinology Physician 2080P0205X
- License number
- 255029 NY
Self-reported in NPPES; status is on the state search - Practice location
- 500 Commack RD, Commack, NY 11725
- Phone
- (631) 444-5437
- Enumerated
- Feb 4, 2009
- Record last updated
- Mar 25, 2026
- Fax
- (631) 638-0157
- Medicare enrollment
- Enrolled (PECOS I20150618000679); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatric endocrinology physician records → All 177 in New York → Look up another NPI →
Also registered at 500 Commack RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rosemarie Carter, PT, DPTPhysical Therapist1790405231
- Sahana Choudhury, NP-CNurse Practitioner1356821292
- Ashish Daniel, PT, DPTPhysical Therapist1093686396
- Jennifer Ehlers, DOEmergency Medicine Physician1851595532
- Diana Farino, PHARMDPharmacist1053165530
Verify Jason Adam Klein 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 255029Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $82.61
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 931 providers of this specialty with any payment received $4,382.94 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
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Adam Klein among 177 pediatric endocrinology physician records in New York
Jason Adam Klein, M.D. is one of 177 pediatric endocrinology physician records with a practice address in New York. 55% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 64% of them.
- NPI issued2009 · 64% of these records are older, 31% newer
- In a Medicare fileYes · 55% of these records are
- In the CMS Doctors and Clinicians fileYes · 22% of these records are
- Graduated2008 · median 2003 among the 39 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0205X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Endocrinology Physician providers in New York
There are 177 pediatric endocrinology physician records in New York.
All 177 in New York → Every provider in Commack → Pediatric Endocrinology Physician nationwide →
The 8 pediatric endocrinology physician records with the nearest ZIP codes
- Payal AnandEast Setauket, NY 117331023218872
- Jennifer Osipoff, MDEast Setauket, NY 117331518138395
- Viswanathan Balachandar, MDBethpage, NY 117141689627721
- Jorge Mejia-Corletto, M.D.North Babylon, NY 117031326278219
- Michael Pugliese, M.D.Babylon, NY 117021477559748
- Lesly Michel, MDFar Rockaway, NY 116911194983429
- Maria Sarah Guevarra, M.D.Nesconset, NY 117671174767529
- Manjula Chatterjee, M.D.Patchogue, NY 117721164625745
Common questions
What is Jason Adam Klein, M.D.'s NPI number?
Jason Adam Klein, M.D.'s National Provider Identifier (NPI) is 1033358676, issued on Feb 4, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Jason Adam Klein, M.D. located?
The NPPES record lists a practice address at 500 Commack RD, Commack, NY, 11725. Phone: (631) 444-5437. Providers update this record themselves, so call before visiting.
How can I verify Jason Adam Klein, M.D.'s license?
NPPES lists New York license number 255029, 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. 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.