Jonathan David Klonsky, MD
Surgery Physician · West Islip, NY
Jonathan David Klonsky, MD is a surgery physician with a practice address in West Islip, New York, and NPI 1619130804, issued on Jul 8, 2008. Check the license (New York 249630, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Jonathan David Klonsky
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 249630 NY
Self-reported in NPPES; status is on the state search - Practice location
- 754 Montauk Hwy, West Islip, NY 11795
- Phone
- (631) 422-0909
- Enumerated
- Jul 8, 2008
- Record last updated
- Jan 17, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (631) 422-6660
- Medicare enrollment
- Enrolled (PECOS I20110915000369); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 2,053 in New York → Look up another NPI →
Also registered at 754 Montauk Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eli Anker, M.D.Vascular Surgery Physician1093733255
- Michael Chu, DOSurgery Physician1275784670
Verify Jonathan David Klonsky 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 249630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average surgery physician in 2024
23 Medicare Part D claims for 14 beneficiaries, against an average of 147 among the 20,115 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.
The MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,450.50
7 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- North Shore-Lij Medical PCWoodbury, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan David Klonsky among 2,053 surgery physician records in New York
Jonathan David Klonsky, MD is one of 2,053 surgery physician records with a practice address in New York. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.
- NPI issued2008 · 57% of these records are older, 37% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2002 among the 1,212 with a school on file
- Record last updated2014 · 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 208600000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 surgery physician records list a practice address in West Islip
They are 16 of the 1,107 NPPES records with a practice address in West Islip, and 2,053 surgery physician records in New York.
All 2,053 in New York → Every provider in West Islip → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Molave Adaniel, M.D.West Islip, NY 117951225011331
- Firas Bridges, MDWest Islip, NY 117951457532996
- Anthony Capizzi, MDWest Islip, NY 117951427022003
- Timothy Carter, M.D.West Islip, NY 117951720304074
- Jennifer Castro, M.D.West Islip, NY 117951477718039
- Michael Chu, DOWest Islip, NY 117951275784670
- Edward Cussatti, M.D.West Islip, NY 117951225068216
- Keith Durante, MDWest Islip, NY 117951710951397
Common questions
What is Jonathan David Klonsky, MD's NPI number?
Jonathan David Klonsky, MD's National Provider Identifier (NPI) is 1619130804, issued on Jul 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan David Klonsky, MD located?
The NPPES record lists a practice address at 754 Montauk Hwy, West Islip, NY, 11795. Phone: (631) 422-0909. Providers update this record themselves, so call before visiting.
How can I verify Jonathan David Klonsky, MD's license?
NPPES lists New York license number 249630, 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 Jonathan David Klonsky, MD prescribe under Medicare Part D?
In 2024, Jonathan David Klonsky, MD had 23 Medicare Part D claims for 14 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Jonathan David Klonsky, MD's MIPS final score?
The 2023 MIPS final score is 91.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.