Leah Elisabeth Karlsen, MD
Internal Medicine Physician · Seattle, WA
Leah Elisabeth Karlsen, MD is an internal medicine physician with a practice address in Seattle, Washington, and NPI 1104408806, issued on Apr 22, 2021. Check the license (Washington MD61455824, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Leah Elisabeth Karlsen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD61455824 WA
Self-reported in NPPES; status is on the state search - Practice location
- 5350 Tallman Ave NW Ste 301, Seattle, WA 98107
- Phone
- (206) 386-2550
- Enumerated
- Apr 22, 2021
- Record last updated
- Nov 19, 2025
- Medicaid ID
- 2188428 WA
- Medicare enrollment
- Enrolled (PECOS I20240924000254); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 5350 Tallman Ave NW Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alice BurdenPhysician Assistant1497083380
- Katherine Campiche, RNRegistered Nurse1447100466
- Bonnie Haberzetle, PA-CPhysician Assistant1205162724
- Mukul Khandelwal, PSYDClinical Psychologist1104644921
- Travis Lane, MDInternal Medicine Physician1689107880
- Yun Lee, ARNPFamily Nurse Practitioner1922471457
Verify Leah Elisabeth Karlsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61455824Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
209 Medicare Part D claims for 53 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Select Outpatient Services IncGlenview, IL
- Select Rehabilitation, LLCGlenview, IL
- Swedish Health ServicesSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leah Elisabeth Karlsen among 3,079 internal medicine physician records in Washington
Leah Elisabeth Karlsen, MD is one of 3,079 internal medicine physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2006 among the 1,852 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
821 internal medicine physician records list a practice address in Seattle
They are 821 of the 41,956 NPPES records with a practice address in Seattle, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Seattle → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Aoyama, MDSeattle, WA 981071952384711
- Amy Deans, MDSeattle, WA 981071568546281
- Warren Fein, MDSeattle, WA 981071659455376
- Richard Fogerty, M.D.Seattle, WA 981071346223815
- Aubrey Girolamo, M.D.Seattle, WA 981071902123623
- Michael Janssen, MDSeattle, WA 981071194804161
- Elizabeth Kracen, M.D.Seattle, WA 981071588894679
- Matthew Noell, M.D.Seattle, WA 981071952711152
Common questions
What is Leah Elisabeth Karlsen, MD's NPI number?
Leah Elisabeth Karlsen, MD's National Provider Identifier (NPI) is 1104408806, issued on Apr 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Leah Elisabeth Karlsen, MD located?
The NPPES record lists a practice address at 5350 Tallman Ave NW Ste 301, Seattle, WA, 98107. Phone: (206) 386-2550. Providers update this record themselves, so call before visiting.
How can I verify Leah Elisabeth Karlsen, MD's license?
NPPES lists Washington license number MD61455824, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leah Elisabeth Karlsen, MD prescribe under Medicare Part D?
In 2024, Leah Elisabeth Karlsen, MD had 209 Medicare Part D claims for 53 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.