Nathan P. Vassill, PA-C
Physician Assistant · Somersworth, NH
Nathan P. Vassill, PA-C is a physician assistant with a practice address in Somersworth, New Hampshire, and NPI 1528371473, issued on Jul 21, 2010. Check the license with the New Hampshire board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nathan P. Vassill
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 7 Marsh Brook Dr, Somersworth, NH 03878
- Phone
- (603) 742-2007
- Enumerated
- Jul 21, 2010
- Record last updated
- Nov 15, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (603) 749-4605
- Medicare enrollment
- Enrolled (PECOS I20101119000640); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 947 in New Hampshire → Look up another NPI →
Also registered at 7 Marsh Brook Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David AbbettPhysical Therapist1699828228
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- Lisa BurkeOccupational Therapist1306385323
- Sean CarpenterPhysical Therapist1417394479
- Shelby Cheever, PA-CPhysician Assistant1326642000
- Peter Dirksmeier, M.D.Orthopaedic Surgery of the Spine Physician1831124361
Verify Nathan P. Vassill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Hampshire board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average physician assistant in 2024
80 Medicare Part D claims for 55 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Cephalexin14 claims
- Meloxicam11 claims
- Oxycodone Hcl11 claims
- Prednisone11 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
- Wentworth Douglass Physician CorporationSomersworth, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan P. Vassill among 947 physician assistant records in New Hampshire
Nathan P. Vassill, PA-C is one of 947 physician assistant records with a practice address in New Hampshire. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 27% of them.
- NPI issued2010 · 27% of these records are older, 71% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2010 · median 2017 among the 730 with a school on file
- Record last updated2014 · 37% 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 New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 physician assistant records list a practice address in Somersworth
They are 19 of the 333 NPPES records with a practice address in Somersworth, and 947 physician assistant records in New Hampshire.
All 947 in New Hampshire → Every provider in Somersworth → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kelly Collins, PA-CSomersworth, NH 038781841676202
- Aaron Copeland, PA-CSomersworth, NH 038781932231289
- Jason Doran, PA-CSomersworth, NH 038781730140104
- Donna Flynn, PA-CSomersworth, NH 038781639290240
- Christopher Jones, PA-CSomersworth, NH 038781598180358
- Kathleen Keys, PA-CSomersworth, NH 038781457784704
- Mark Mooradian, PA-CSomersworth, NH 038781417349382
- Heath Pelletier, PA-CSomersworth, NH 038781548747017
Common questions
What is Nathan P. Vassill, PA-C's NPI number?
Nathan P. Vassill, PA-C's National Provider Identifier (NPI) is 1528371473, issued on Jul 21, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Nathan P. Vassill, PA-C located?
The NPPES record lists a practice address at 7 Marsh Brook Dr, Somersworth, NH, 03878. Phone: (603) 742-2007. Providers update this record themselves, so call before visiting.
How can I verify Nathan P. Vassill, PA-C's license?
Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.
How much does Nathan P. Vassill, PA-C prescribe under Medicare Part D?
In 2024, Nathan P. Vassill, PA-C had 80 Medicare Part D claims for 55 beneficiaries; the average among physician assistant prescribers was 830. 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.