William Lon Peterson Lancaster, PA-C
Physician Assistant · Saint Joseph, MI
William Lon Peterson Lancaster, PA-C is a physician assistant with a practice address in Saint Joseph, Michigan, and NPI 1386531184, issued on Jun 23, 2025. Check the license (Michigan 5601013212, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Lon Peterson Lancaster
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 5601013212 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1234 Napier Ave, Saint Joseph, MI 49085
- Phone
- (269) 983-8300
- Enumerated
- Jun 23, 2025
- Record last updated
- Sep 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20250729002047); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 6,989 in Michigan → Look up another NPI →
Also registered at 1234 Napier Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Lon Peterson Lancaster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 5601013212Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Lakeland Medical PracticesSaint Joseph, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Lon Peterson Lancaster among 6,989 physician assistant records in Michigan
William Lon Peterson Lancaster, PA-C is one of 6,989 physician assistant records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 91% of them.
- NPI issued2025 · 91% of these records are older, 2% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2025 · median 2017 among the 4,739 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
47 physician assistant records list a practice address in Saint Joseph
They are 47 of the 1,038 NPPES records with a practice address in Saint Joseph, and 6,989 physician assistant records in Michigan.
All 6,989 in Michigan → Every provider in Saint Joseph → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Timothy Ashton, PASaint Joseph, MI 490851396728994
- Jennifer Benson, PASaint Joseph, MI 490851548548084
- Angela Blomgren, PA-CSaint Joseph, MI 490851821272402
- Michael Callahan, PA-CSaint Joseph, MI 490851891844148
- Tamara Grady, PASaint Joseph, MI 490851780612697
- Julie Jacobs, P.A.Saint Joseph, MI 490851770592008
- Johanna Killian, PASaint Joseph, MI 490851114038700
- Susan Kingbarry, PACSaint Joseph, MI 490851134145253
Common questions
What is William Lon Peterson Lancaster, PA-C's NPI number?
William Lon Peterson Lancaster, PA-C's National Provider Identifier (NPI) is 1386531184, issued on Jun 23, 2025. An NPI identifies a provider in billing; it is not a license.
Where is William Lon Peterson Lancaster, PA-C located?
The NPPES record lists a practice address at 1234 Napier Ave, Saint Joseph, MI, 49085. Phone: (269) 983-8300. Providers update this record themselves, so call before visiting.
How can I verify William Lon Peterson Lancaster, PA-C's license?
NPPES lists Michigan license number 5601013212, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity 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.