Active NPI
Rett Gallagher
- Registered Nurse
- Billings, MT
National Provider Identifier
1639085111
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Registered Nurse
- License
- 285239
- Practice address
- 2800 10TH Ave N
Billings, MT 59101-0703 - Phone
- (406) 238-2500
- NPI assigned
- Aug 24, 2026
- Last updated
- Aug 24, 2026
- 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 |
|---|---|---|---|---|
| Registered Nurse | 163W00000X | 285239 | MT | Primary |
Addresses
Primary practice location
2800 10TH Ave N
Billings, MT 59101-0703
Mailing address
PO Box 711
Park City, MT 59063-0711
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)
- Not enrolled
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1787529600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1787529600000",
"number": "1639085111",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 711",
"city": "PARK CITY",
"state": "MT",
"postal_code": "590630711"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2800 10TH AVE N",
"city": "BILLINGS",
"state": "MT",
"postal_code": "591010703",
"telephone_number": "406-238-2500"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GALLAGHER",
"first_name": "RETT",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2026-08-24",
"last_updated": "2026-08-24",
"certification_date": "2026-08-23",
"status": "A"
},
"taxonomies": [
{
"code": "163W00000X",
"taxonomy_group": "",
"desc": "Registered Nurse",
"state": "MT",
"license": "285239",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Billings, MT
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.