Doctor profile · Federal record
Dr. Jeffrey Michalak, DO
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Gastroenterology Physician · Dakota Dunes, SD
- NPI 1962622431
- Accepts Medicare
- 21 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
575 N Sioux Point Road
Dakota Dunes, SD 570495312
(605) 217-2667
fax (605) 217-2900 - Additional location
-
705 N Sioux Point RD, Suite 100
Dakota Dunes, SD 570495091
(605) 217-5500
fax (605) 217-5515
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- December 10, 2025
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (3)
- South Dakota #8388 · Nebraska #933 · Iowa #DO-04307
- Medicaid (3)
- NH #1962622431 · IA #1962622431 · SD #1962622431
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1962622431. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,251
Distinct HCPCS
10
Medicare allowed
$167,321
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 308 | 290 | $90 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 211 | 208 | $231 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 197 | 197 | $138 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 161 | 131 | $87 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 126 | 125 | $163 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 68 | 59 | $124 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 60 | 59 | $89 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 43 | 43 | $160 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 26 | 26 | $152 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 20 | 13 | $46 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 72. This provider delivers 17× the peer median.Open Payments
Industry payments received
All-time total
$288
Transactions
15
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Biotech, Inc. | 6 | $98.99 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 3 | $57.65 | |
| AIMMUNE THERAPEUTICS, INC. | 2 | $54.28 | |
| Celgene Corporation | 3 | $49.47 | |
| Regeneron Healthcare Solutions, Inc. | 1 | $27.33 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,883
Patients
1,100
Total drug cost
$194,414
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 1,122 | 296 | $12,312 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 370 | 362 | $30,827 |
| Omeprazole | Generic | 316 | 77 | $3,794 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 203 | 47 | $48,852 |
| Lansoprazole | Generic | 180 | 40 | $5,394 |
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 135 | 132 | $2,312 |
| Colestipol Hcl | Generic | 121 | 31 | $15,938 |
| Linzess (Linaclotide) | Brand | 71 | 17 | $42,660 |
| Suprep (Sodium, Potassium,mag Sulfates) | Brand | 71 | 70 | $8,188 |
| Budesonide Dr (Budesonide) | Brand | 61 | 16 | $10,524 |
Frequently asked questions
What is Dr. Jeffrey Michalak's medical specialty?
Dr. Jeffrey Michalak practices Gastroenterology Physician in Dakota Dunes, SD.
Where does Dr. Jeffrey Michalak practice?
Dr. Jeffrey Michalak practices at 575 N Sioux Point Road, Dakota Dunes, SD 570495312. Office phone: 6052172667.
What is Dr. Jeffrey Michalak's NPI?
Dr. Jeffrey Michalak's National Provider Identifier (NPI) is 1962622431, issued by NPPES.
Does Dr. Jeffrey Michalak accept Medicare assignment?
Yes. Dr. Jeffrey Michalak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jeffrey Michalak commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.