Active NPI
Leah Elisabeth Karlsen, MD
- Internal Medicine Physician
- Seattle, WA
National Provider Identifier
1104408806
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- MD61455824
- Practice address
- 5350 Tallman Ave NW Ste 301
Seattle, WA 98107-5902 - Phone
- (206) 386-2550
- NPI assigned
- Apr 22, 2021
- Sex
- Female
- 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 |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | MD61455824 | WA | Primary |
Addresses
Primary practice location
5350 Tallman Ave NW Ste 301
Seattle, WA 98107-5902
Mailing address
PO Box 25608
Salt Lake City, UT 84125-0608
Phone (206) 320-4476
Other practice location 1
1959 NE Pacific St
Seattle, WA 98195-0001
Phone (206) 543-3605
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2188428 | Medicaid | WA |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Internal Medicine
- Education
- University of Washington School of Medicine, 2021
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
5350 Tallman Ave NW
Suite 301
Seattle, WA 98107-5902
Phone (206) 320-3335
Hospital & facility affiliations
- Providence at Home With Compassus Home Health, King
- Assured Home Health
- Swedish Medical Center
- Swedish Edmonds Hospital
- Swedish Medical Center / Cherry Hill
Merit-based Incentive Payment System (MIPS)
- Final score
- 96.26 of 100
- Quality
- 84.3
- Promoting interoperability
- 100
- Improvement activities
- 40
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Removal of skin lesions | 1-10 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| MD61455824 | WA | MD | Internal Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Swedish Health Services | Current | Accepting new patients | |
| Swedish Health Services | Internal Medicine | Current | Accepting new patients |
Locations
13020 Meridian Ave S
Everett, WA 98208
Phone (425) 357-3700
5350 Tallman Ave NW
Ste 301
Seattle, WA 98107
Phone (206) 320-3335
2450 33rd Ave W
Ste 100
Seattle, WA 98199
Phone (206) 320-3364
Interoperability endpoints
- lkarlsen1047724@wm.providencedirect.org
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Physical Therapist
- Seattle, WA
- NPI 1619680840
Hospital & facility affiliations 6
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Home Health Agency
- Tukwila, WA
- NPI 1972325983
-
- Home Health Agency
- Mountlake Terrace, WA
- NPI 1770998528
-
- General Acute Care Hospital
- Edmonds, WA
- NPI 1033107214
-
- General Acute Care Hospital
- Seattle, WA
- NPI 1306992151
-
- General Acute Care Hospital
- Seattle, WA
- NPI 1356496582
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1619049600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1763510400000",
"number": "1104408806",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 25608",
"city": "SALT LAKE CITY",
"state": "UT",
"postal_code": "841250608",
"telephone_number": "206-320-4476"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5350 TALLMAN AVE NW STE 301",
"city": "SEATTLE",
"state": "WA",
"postal_code": "981075902",
"telephone_number": "206-386-2550"
}
],
"practiceLocations": [
{
"address_1": "1959 NE Pacific St",
"address_purpose": "LOCATION",
"city": "Seattle",
"state": "WA",
"postal_code": "981950001",
"country_code": "US",
"telephone_number": "206-543-3605",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "KARLSEN",
"first_name": "LEAH",
"middle_name": "ELISABETH",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2021-04-22",
"last_updated": "2025-11-19",
"certification_date": "2025-11-19",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "WA",
"license": "MD61455824",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "2188428",
"state": "WA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Seattle, WA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 19, 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.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.