Active NPI
Gary L Grammens, M.D.
- Hematology & Oncology Physician
- Minneapolis, MN
National Provider Identifier
1528031382
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Hematology & Oncology Physician
- License
- 22088
- Practice address
- 701 25TH Ave S
Suite # 505
Minneapolis, MN 55454-1513 - Phone
- (612) 455-2050
- Fax
- (612) 455-2009
- NPI assigned
- Feb 10, 2006
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | 22088 | MN | Primary |
Addresses
Primary practice location
701 25TH Ave S
Suite # 505
Minneapolis, MN 55454-1513
Mailing address
9324 Wyoming Ave S
Bloomington, MN 55438-1436
Phone (952) 944-1745
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2042086 | Other | MN | MEDICAL ASSISTANCE |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 22088 | MN | MD | Hematology & Oncology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1139529600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1528031382",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "9324 WYOMING AVE S",
"city": "BLOOMINGTON",
"state": "MN",
"postal_code": "554381436",
"telephone_number": "952-944-1745"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "701 25TH AVE S",
"address_2": "SUITE # 505",
"city": "MINNEAPOLIS",
"state": "MN",
"postal_code": "554541513",
"telephone_number": "612-455-2050",
"fax_number": "612-455-2009"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GRAMMENS",
"first_name": "GARY",
"middle_name": "L",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-02-10",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "MN",
"license": "22088",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "MEDICAL ASSISTANCE",
"identifier": "2042086",
"state": "MN"
}
],
"endpoints": [],
"other_names": []
}Other providers in Minneapolis, MN
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.