William Swanson
Emergency Medicine Physician · Sacramento, CA
William Swanson is an emergency medicine physician with a practice address in Sacramento, California, and NPI 1639587603, issued on Jul 23, 2014. Check the license (California A150583, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Swanson
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A150583 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2315 Stockton Blvd, Sacramento, CA 95817
- Phone
- (916) 734-8570
- Enumerated
- Jul 23, 2014
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (916) 734-7950
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 2315 Stockton Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Swanson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A150583Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average emergency medicine physician in 2024
236 Medicare Part D claims for 161 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 41 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen28 claims
- Cefpodoxime Proxetil21 claims
- Amoxicillin-Clavulanate Potass13 claims
- Pradaxa11 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.
William Swanson among 7,751 emergency medicine physician records in California
William Swanson is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 69% of them.
- NPI issued2014 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
369 emergency medicine physician records list a practice address in Sacramento
They are 369 of the 33,083 NPPES records with a practice address in Sacramento, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Sacramento → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jodie Craig, M.D.Sacramento, CA 958171659354124
- Greg Hachigian, M.D.Sacramento, CA 958171558342022
- James Holmes, MD, MPHSacramento, CA 958171427033091
- James Kirk, MDSacramento, CA 958171598749848
- Nathan Kuppermann, M.D., M.P.H.Sacramento, CA 958171356322150
- James Lee, M.D.Sacramento, CA 958171730163510
- Kerry McMahon, MDSacramento, CA 958171235113549
- Robert Narverud, M.D.Sacramento, CA 958171457335754
Common questions
What is William Swanson's NPI number?
William Swanson's National Provider Identifier (NPI) is 1639587603, issued on Jul 23, 2014. An NPI identifies a provider in billing; it is not a license.
Where is William Swanson located?
The NPPES record lists a practice address at 2315 Stockton Blvd, Sacramento, CA, 95817. Phone: (916) 734-8570. Providers update this record themselves, so call before visiting.
How can I verify William Swanson's license?
NPPES lists California license number A150583, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Swanson prescribe under Medicare Part D?
In 2024, William Swanson had 236 Medicare Part D claims for 161 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.