Michael Carl Larsen, MD
Gastroenterology Physician · Seattle, WA
Michael Carl Larsen, MD is a gastroenterology physician with a practice address in Seattle, Washington, and NPI 1962685222, issued on Dec 10, 2007. Check the license (Washington MD60295858, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Michael Carl Larsen
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD60295858 WA
A97376 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 9TH Ave, Seattle, WA 98101
- Phone
- (206) 223-2319
- Enumerated
- Dec 10, 2007
- Record last updated
- Jun 18, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (206) 223-6379
- Medicaid ID
- 1962685222 WA
- Medicare enrollment
- Enrolled (PECOS I20230613000958); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Also registered at 1100 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barry Aaronson, MDHospitalist Physician1952418345
- David Aboulafia, MDHematology & Oncology Physician1043269392
- Deborah Abrams, M.D.Hematology & Oncology Physician1902974835
- Alvin Aceron, ARNPAdult Health Nurse Practitioner1639488562
- Ream AdeebAdult Health Nurse Practitioner1760868855
- Steven Adler, MDDiagnostic Ultrasound Physician1639108046
Verify Michael Carl Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60295858Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average gastroenterology physician in 2024
31 Medicare Part D claims for 15 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $1,492.94
9 payments; by number, the most common kind was travel and lodging; the largest payer was Boston Scientific Corporation. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Regents OF The University OF CaliforniaSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Carl Larsen among 533 gastroenterology physician records in Washington
Michael Carl Larsen, MD is one of 533 gastroenterology physician records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 36% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2005 · median 2003 among the 373 with a school on file
- Record last updated2013 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Washington
There are 533 gastroenterology physician records in Washington.
All 533 in Washington → Every provider in Seattle → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Elisa Boden, M.D.Seattle, WA 981011932167400
- James Bredfeldt, MDSeattle, WA 981011598796989
- Fred Drennan, MDSeattle, WA 981011811916489
- Seng-Ian Gan, M.D.Seattle, WA 981011700833498
- Michael Gluck, MDSeattle, WA 981011871516617
- Geoffrey Jiranek, MDSeattle, WA 981011982628806
- Johannes Koch, MDSeattle, WA 981011396716148
- Richard Kozarek, MDSeattle, WA 981011124042379
Common questions
What is Michael Carl Larsen, MD's NPI number?
Michael Carl Larsen, MD's National Provider Identifier (NPI) is 1962685222, issued on Dec 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael Carl Larsen, MD located?
The NPPES record lists a practice address at 1100 9TH Ave, Seattle, WA, 98101. Phone: (206) 223-2319. Providers update this record themselves, so call before visiting.
How can I verify Michael Carl Larsen, MD's license?
NPPES lists Washington license number MD60295858, 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 Michael Carl Larsen, MD prescribe under Medicare Part D?
In 2024, Michael Carl Larsen, MD had 31 Medicare Part D claims for 15 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.