Grerk Sutamtewagul, MD
Grerk Sutamtewagul, MD is a Hematology & Oncology Physician in Iowa City, IA, registered under NPI 1003103383. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Iowa City, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 0.20 mi away at Hawkeye Parking Ramp. There is EV charging 0.41 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 456 ft away, served by Hawkins Drive - UI Main Hospital, Kinnick Stadium. If you arrive early, there is a coffee shop 0.41 mi away.
Getting here and what is nearby
Transit Ramp 2, Pappajohn& Pomerantz 296 ft ~2 min
Transit Hawkins Dr - UI Main Hospital, Kinnick Stadium 324 ft ~2 min
Transit Hawkins Drive - UI Main Hospital, Kinnick Stadium 456 ft ~2 min
EV charging ChargePoint 630 ft ~3 min
Parking Hospital Parking Ramp 3 725 ft ~3 min
800 Evashevski Drive, Iowa City 52242
Parking Hospital Parking Ramp 4 - Lot 30 742 ft ~3 min
39 For The Kids Way, Iowa City 52242
Parking Hawkeye Parking Ramp 0.20 mi ~4 min
220 Hawkeye Ramp Drive, Iowa City 52242
Hotel Courtyard Iowa City University Heights 0.24 mi ~5 min
Restaurant Stella 0.24 mi ~5 min
Restaurant Black's Gold Grill 0.27 mi ~6 min
Coffee The Filling Station 0.30 mi ~7 min
Coffee EMRB Cafe 0.31 mi ~7 min
Convenience Grand Avenue Market 0.35 mi ~7 min
Coffee Java House Coffee 0.41 mi ~9 min
159 Newton Road, Iowa City 52242
EV charging ChargePoint 0.41 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| R-09931 | IA | Hematology & Oncology Physician |
| MD-43972 | IA | Hematology & Oncology Physician primary |
This provider holds licence R-09931 issued in IA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Hematology
- PAC ID
- 4789961376
- Enrollment ID
- I20170509001389
Medicare enrolment is recorded as approved under the provider type Practitioner - Hematology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hematology & Oncology covers
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered. NUCC Health Care Provider Taxonomy, code 207RH0003X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RH0003X | Hematology & Oncology Physician Hematology & Oncology | R-09931 | IA | |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — | |
| 207RH0003X | Hematology & Oncology Physician Hematology & Oncology | MD-43972 | IA | primary |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003103383 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 7, 2011 |
| Last updated | Jan 29, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
200 HAWKINS DR DEPT OF INTERNAL MEDICINE Iowa City, IA 52242 (319) 356-1616 Fax (319) 353-8383 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 1 | 0 | 3 | 3 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 6 | 3 | 7 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.