Doctor profile · Federal record
Dr. Jonathan Klonsky, MD
Surgery Physician (CMS: General Surgery) · West Islip, NY
- NPI 1619130804
- Accepts Medicare
- MIPS 85.0 / 100 · 2023
- 24 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
754 Montauk Hwy
West Islip, NY 11795
(631) 422-0909
fax (631) 422-6660
Credentials & registration
- NPI registered
- July 2008 — 18 yrs on file
- Profile last updated
- January 17, 2014
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 208600000X — NUCC code
- State license (1)
- New York #249630
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1619130804. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
291
Distinct HCPCS
9
Medicare allowed
$39,076
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 67 | 33 | $90 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 56 | 55 | $200 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 37 | 24 | $58 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 32 | 26 | $106 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 27 | 27 | $196 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 26 | 20 | $149 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 18 | 15 | $199 | |
43999 |
Other procedure on stomach | 17 | 14 | $155 | |
99283 |
Emergency department visit with low level of medical decision making | 11 | 11 | $85 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 75. This provider delivers 3.9× the peer median.Open Payments
Industry payments received
All-time total
$1,451
Transactions
7
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| INTUITIVE SURGICAL, INC. | 7 | $1,450.50 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
0
Total drug cost
$42
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 12 | 0 | $42 |
Hospital affiliations
Frequently asked questions
What is Dr. Jonathan Klonsky's medical specialty?
Dr. Jonathan Klonsky practices Surgery Physician in West Islip, NY.
Where does Dr. Jonathan Klonsky practice?
Dr. Jonathan Klonsky practices at 754 Montauk Hwy, West Islip, NY 11795. Office phone: 6314220909.
What is Dr. Jonathan Klonsky's NPI?
Dr. Jonathan Klonsky's National Provider Identifier (NPI) is 1619130804, issued by NPPES.
Does Dr. Jonathan Klonsky accept Medicare assignment?
Yes. Dr. Jonathan Klonsky accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jonathan Klonsky commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with moderate level of medical decision making (HCPCS 99223); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.