Sophia Mansfield Swanson, M.D.
Gastroenterology Physician · Seattle, WA
Sophia Mansfield Swanson, M.D. is a gastroenterology physician with a practice address in Seattle, Washington, and NPI 1831498203, issued on Mar 24, 2011. Check the license (Washington 60542275, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Sophia Mansfield Swanson
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 60542275 WA
Self-reported in NPPES; status is on the state search - Practice location
- 125 16TH Ave, Seattle, WA 98122
- Phone
- (206) 326-3000
- Enumerated
- Mar 24, 2011
- Record last updated
- May 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181010001798); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Verify Sophia Mansfield Swanson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license 60542275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average gastroenterology physician in 2024
200 Medicare Part D claims for 55 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims.
Most prescribed
- Mesalamine37 claims
- Gavilyte-C30 claims
- Omeprazole15 claims
- Stelara15 claims
- Entyvio13 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 one group practice
- Kaiser Foundation Health Plan OF WashingtonSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sophia Mansfield Swanson among 533 gastroenterology physician records in Washington
Sophia Mansfield Swanson, M.D. 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 2011, is newer than 74% of them.
- NPI issued2011 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2011 · median 2003 among the 373 with a school on file
- Record last updated2021 · 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
- David Gilbert, M.D.Seattle, WA 981221760459382
- Justin Goodman, MDSeattle, WA 981221538125331
- Kyung Han, M.D.Seattle, WA 981221497722029
- Peggy Headstrom, MDSeattle, WA 981221962518944
- Stanley Lee, M.D.Seattle, WA 981221427026350
- Maximilian Lee, M.D.Seattle, WA 981221518143478
- Jennifer Lee, MDSeattle, WA 981221902337322
- Craig Pepin, M.D.Seattle, WA 981221114995511
Common questions
What is Sophia Mansfield Swanson, M.D.'s NPI number?
Sophia Mansfield Swanson, M.D.'s National Provider Identifier (NPI) is 1831498203, issued on Mar 24, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Sophia Mansfield Swanson, M.D. located?
The NPPES record lists a practice address at 125 16TH Ave, Seattle, WA, 98122. Phone: (206) 326-3000. Providers update this record themselves, so call before visiting.
How can I verify Sophia Mansfield Swanson, M.D.'s license?
NPPES lists Washington license number 60542275, 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 Sophia Mansfield Swanson, M.D. prescribe under Medicare Part D?
In 2024, Sophia Mansfield Swanson, M.D. had 200 Medicare Part D claims for 55 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.