William P. Simpson, PA-C
Physician Assistant · Brunswick, ME
William P. Simpson, PA-C is a physician assistant with a practice address in Brunswick, Maine, and NPI 1194789073, issued on Apr 17, 2006. Check the license (Maine PA001285, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William P. Simpson
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA001285 ME
15-0-1100 KS
Self-reported in NPPES; status is on the state search - Practice location
- 430 Bath RD, Brunswick, ME 04011
- Phone
- (207) 442-0350
- Enumerated
- Apr 17, 2006
- Record last updated
- Oct 9, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (207) 442-0355
- Medicaid ID
- 200381060D KS
- Medicare enrollment
- Enrolled (PECOS I20110920000219); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 2004
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 979 in Maine → Look up another NPI →
Also registered at 430 Bath RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jacob Furey, M.D.Orthopaedic Surgery Physician1487948527
- Tatyana Heer, PASurgical Physician Assistant1215405733
- Mark Henry, M.D.Orthopaedic Surgery Physician1194794677
Verify William P. Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license PA001285Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average physician assistant in 2024
756 Medicare Part D claims for 267 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 352 claims were for opioids.
Most prescribed
- Tramadol Hcl175 claims
- Amoxicillin171 claims
- Oxycodone Hcl138 claims
- Mupirocin105 claims
- Azithromycin32 claims
- Ondansetron Odt31 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.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $51.32
2 payments; by number, the most common kind was food and beverage; the largest payer was Zimmer Biomet Holdings, Inc. The 64,719 providers of this specialty with any payment received $841.65 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 one group practice
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William P. Simpson among 979 physician assistant records in Maine
William P. Simpson, PA-C is one of 979 physician assistant records with a practice address in Maine. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 73% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · median 2017 among the 648 with a school on file
- Record last updated2017 · 47% 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 Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 physician assistant records list a practice address in Brunswick
They are 22 of the 981 NPPES records with a practice address in Brunswick, and 979 physician assistant records in Maine.
All 979 in Maine → Every provider in Brunswick → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kerri Arsenault, PABrunswick, ME 040111649210576
- Amy Bosinske, PA CBrunswick, ME 040111831166693
- Theresa Callender, LCSW, PA-CBrunswick, ME 040111962410860
- Precious Dean, PABrunswick, ME 040111972924561
- Karen Marlin, PACBrunswick, ME 040111811077696
- Christopher Martucci, R-PACBrunswick, ME 040111336566421
- Jane Nichols-EckerBrunswick, ME 040111134309834
- Ingrid Sherrill, PABrunswick, ME 040111659343408
Common questions
What is William P. Simpson, PA-C's NPI number?
William P. Simpson, PA-C's National Provider Identifier (NPI) is 1194789073, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William P. Simpson, PA-C located?
The NPPES record lists a practice address at 430 Bath RD, Brunswick, ME, 04011. Phone: (207) 442-0350. Providers update this record themselves, so call before visiting.
How can I verify William P. Simpson, PA-C's license?
NPPES lists Maine license number PA001285, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does William P. Simpson, PA-C prescribe under Medicare Part D?
In 2024, William P. Simpson, PA-C had 756 Medicare Part D claims for 267 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is William P. Simpson, PA-C's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.