Doctor profile · Federal record
Dr. Darren Kastin, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Naperville, IL
- NPI 1164402244
- Accepts Medicare
- MIPS 91.4 / 100 · 2023
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1243 Rickert Dr
Naperville, IL 605400954
(630) 527-6450
fax (630) 527-6456
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- July 28, 2008
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Illinois #036-102510
- Medicaid
- IL #036-102510
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164402244. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
481
Distinct HCPCS
10
Medicare allowed
$76,735
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 140 | 140 | $253 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 80 | 78 | $100 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 52 | 42 | $130 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 38 | 38 | $172 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 37 | 31 | $83 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 31 | 26 | $91 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 24 | 24 | $82 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 21 | 21 | $137 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 18 | 18 | $53 | |
45390 |
Removal of large bowel tissue using a flexible endoscope | 14 | 14 | $338 |
In context: peer comparison
Among 9 peers in Naperville Gastroenterology Physician, average services per provider: 41. This provider delivers 12× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
419
Patients
229
Total drug cost
$21,477
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 128 | 125 | $3,044 |
| Omeprazole | Generic | 93 | 42 | $1,708 |
| Pantoprazole Sodium | Generic | 53 | 25 | $723 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 38 | 37 | $771 |
| Dicyclomine Hcl | Generic | 26 | 0 | $666 |
| Famotidine | Generic | 22 | 0 | $112 |
| Lansoprazole | Generic | 18 | 0 | $795 |
| Budesonide Dr (Budesonide) | Brand | 14 | 0 | $3,277 |
| Linzess (Linaclotide) | Brand | 14 | 0 | $8,411 |
| Esomeprazole Magnesium | Generic | 13 | 0 | $1,970 |
Frequently asked questions
What is Dr. Darren Kastin's medical specialty?
Dr. Darren Kastin practices Gastroenterology Physician in Naperville, IL.
Where does Dr. Darren Kastin practice?
Dr. Darren Kastin practices at 1243 Rickert Dr, Naperville, IL 605400954. Office phone: 6305276450.
What is Dr. Darren Kastin's NPI?
Dr. Darren Kastin's National Provider Identifier (NPI) is 1164402244, issued by NPPES.
Does Dr. Darren Kastin accept Medicare assignment?
Yes. Dr. Darren Kastin accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Darren Kastin commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.