Active NPI
James Leonard Gajewski, MD
- Internal Medicine Physician
- Joint Base Lewis McChord, WA
National Provider Identifier
1356349112
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- MD61306843
- Practice address
- 9040 Jackson Ave
Joint Base Lewis McChord, WA 98431-0001 - Phone
- (253) 968-1110
- NPI assigned
- Jul 14, 2005
- 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 9
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | G57111 | CA | |
| Hematology & Oncology Physician | 207RH0003X | MD.61306843 | WA | |
| Internal Medicine Physician | 207R00000X | MD61306843 | WA | Primary |
| Internal Medicine Physician | 207R00000X | G57111 | CA | |
| Hematology & Oncology Physician | 207RH0003X | DR.0071741 | CO | |
| Hematology & Oncology Physician | 207RH0003X | J3475 | TX | |
| Hematology & Oncology Physician | 207RH0003X | MD27403 | OR | |
| Hematology & Oncology Physician | 207RH0003X | MD61306843 | WA | |
| Internal Medicine Physician | 207R00000X | DR.00717741 | CO |
Addresses
Primary practice location
9040 Jackson Ave
Joint Base Lewis McChord, WA 98431-0001
Mailing address
9040 Jackson Ave
Madigan Army Hospital
Joint Base Lewis McChord, WA 98431-0001
Phone (503) 352-8657
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA, CO
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20200515001711 | CA | Order and Referring Only - Internal Medicine | 7911948047 | |
| I20231107001862 | CO | Order and Referring Only - Hematology/Oncology | 7911948047 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| G57111 | CA | MD | Internal Medicine Physician |
| DR.00717741 | CO | MD | Internal Medicine Physician |
| MD61306843 | WA | MD | Internal Medicine Physician |
| J3475 | TX | MD | Hematology & Oncology Physician |
| MD.61306843 | WA | MD | Hematology & Oncology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1121299200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757030400000",
"number": "1356349112",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "9040 JACKSON AVE",
"address_2": "MADIGAN ARMY HOSPITAL",
"city": "JOINT BASE LEWIS MCCHORD",
"state": "WA",
"postal_code": "984310001",
"telephone_number": "503-352-8657",
"fax_number": "253-968-1110"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "9040 JACKSON AVE",
"city": "JOINT BASE LEWIS MCCHORD",
"state": "WA",
"postal_code": "984310001",
"telephone_number": "253-968-1110"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GAJEWSKI",
"first_name": "JAMES",
"middle_name": "LEONARD",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-07-14",
"last_updated": "2025-09-05",
"certification_date": "2025-09-05",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "CA",
"license": "G57111",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "WA",
"license": "MD.61306843",
"primary": false
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "WA",
"license": "MD61306843",
"primary": true
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "CA",
"license": "G57111",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "CO",
"license": "DR.0071741",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "TX",
"license": "J3475",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "OR",
"license": "MD27403",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "WA",
"license": "MD61306843",
"primary": false
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "CO",
"license": "DR.00717741",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Joint Base Lewis McChord, WA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 5, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.