Doctor profile · Federal record
Dr. Nathaniel Kwak, MD
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Salt Lake City, UT
- NPI 1245674191
- Accepts Medicare
- MIPS 92.4 / 100 · 2023
- 13 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1187 E 3900 S
Salt Lake City, UT 841241201
(801) 263-3041
Credentials & registration
- NPI registered
- April 2013 — 13 yrs on file
- Profile last updated
- August 21, 2023
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Utah #13181453-1205 · Texas #S2824
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1245674191. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
123
Distinct HCPCS
7
Medicare allowed
$14,725
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 25 | 23 | $91 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 25 | 25 | $110 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 18 | 18 | $128 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 16 | 13 | $92 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 14 | 14 | $250 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 14 | 14 | $85 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 11 | 11 | $113 |
In context: peer comparison
Among 14 peers in Salt Lake City Gastroenterology Physician, average services per provider: 125. This provider delivers 1.0× the peer median.Open Payments
Industry payments received
All-time total
$345
Transactions
5
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boston Scientific Corporation | 1 | $211.11 | |
| Janssen Biotech, INC. | 2 | $91.64 | |
| Genzyme Corporation | 2 | $42.11 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
188
Patients
109
Total drug cost
$5,132
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 79 | 47 | $1,487 |
| Metoclopramide Hcl | Generic | 26 | 12 | $98 |
| Omeprazole | Generic | 26 | 16 | $455 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 24 | 23 | $1,926 |
| Lactulose | Generic | 11 | 0 | $387 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 11 | 11 | $279 |
| Tenofovir Disoproxil Fumarate | Generic | 11 | 0 | $500 |
Frequently asked questions
What is Dr. Nathaniel Kwak's medical specialty?
Dr. Nathaniel Kwak practices Gastroenterology Physician in Salt Lake City, UT.
Where does Dr. Nathaniel Kwak practice?
Dr. Nathaniel Kwak practices at 1187 E 3900 S, Salt Lake City, UT 841241201. Office phone: 8012633041.
What is Dr. Nathaniel Kwak's NPI?
Dr. Nathaniel Kwak's National Provider Identifier (NPI) is 1245674191, issued by NPPES.
Does Dr. Nathaniel Kwak accept Medicare assignment?
Yes. Dr. Nathaniel Kwak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nathaniel Kwak commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); New patient office or other outpatient visit (HCPCS 99203); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.