Dr. Frederick Richard Stack, MD
Dr. Frederick Richard Stack, MD is an Internal Medicine in Sioux City, Iowa. Graduated from University of Nebraska College of Medicine in 1991, 35 years ago. Practices with Benefis Hospitals Inc, a 398-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Arizona, Iowa and Montana.
- Years since qualifying
- 35
- Trained at
- University of Nebraska College of Medicine
- Licensed in
- AZ, IA, MT
- In the registry since
- 2005
- Specialties on file
- 3
What do these letters mean?
- MD — Doctor of Medicine
- A physician who completed allopathic medical school.
Practice location Address checks out
801 5th StSioux City, IA 51101-1326
Phone: (712) 279-2010
Fax: (712) 279-2034
Show map & directions
Directions in Google Maps · Apple Maps · OpenStreetMap
Pin is approximate — placed at the ZIP-code centre, not the exact door.
Additional practice locations (3)
- 1821 N Trekell Rd, Casa Grande, AZ 85222-1705 — (520) 421-1122
- 1 Medical Center Dr, Biddeford, ME 04005-9422 — (207) 283-7937
- 1101 26th St S, Great Falls, MT 59405-5161 — (406) 455-4694
Specialties & licences
| Internal Medicine Physician (primary) | Taxonomy 207R00000X · Licence MD-46368 (IA) |
|---|---|
| Internal Medicine Physician | Taxonomy 207R00000X · Licence 91977 (MT) |
| Specialist | Taxonomy 174400000X · Licence 24459 (AZ) |
Record details
| NPI number | 1548256977 |
|---|---|
| Entity type | Individual (Type 1) |
| Gender | Male |
| Credentials | MD |
| Sole proprietor | Yes |
| NPI enumerated | September 21, 2005 |
| Last updated in NPPES | January 28, 2026 |
| Certification date | January 28, 2026 |
| Mailing address | 6909 East Ray Road #15-114, Chandler, AZ 85226 |
Medicare enrollment
| Medicare specialty | INTERNAL MEDICINE |
|---|---|
| Medical school | UNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE |
| Graduated | 1991 (35 years in practice) |
| Group practice | Benefis Hospitals Inc — 398 clinicians |
| Accepts Medicare assignment | Yes — accepts the Medicare-approved amount |
| Practice locations | 3 on file with Medicare |
Other providers in Sioux City
-
Anukul Roy, MD
801 5th St, Sioux City, IA 51101-1326 · (602) 778-3600
-
Larry W Sellers, MD
801 5th St, Sioux City, IA 51101-1394 · (712) 279-2010
-
Shila Simkhada, MD
2720 Stone Park Blvd Ste 335, Sioux City, IA 51104-3734 · (605) 937-5537
-
Siouxland Hospitalists PLLC
2720 Stone Park Blvd Ste 335, Sioux City, IA 51104-3734 · (605) 937-5537
-
Chad Allen Stadsvold, DO
2800 Pierce St Ste 110, Sioux City, IA 51104-3755 · (712) 279-3754
-
Dr. Robert Mark Stewart, MD
2730 Pierce St Ste 401, Sioux City, IA 51104-3796 · (712) 255-8827
-
Dr. Rodrigo Torres, MD
801 5th St, Sioux City, IA 51101-1326 · (712) 279-2010
-
Dr. Jehad Zeidalkilani, MD
801 5th St, Sioux City, IA 51101-1326 · (712) 279-2010