Zachary R. Witter, PA
Physician Assistant · Foxborough, MA
Zachary R. Witter, PA is a physician assistant with a practice address in Foxborough, Massachusetts, and NPI 1174170112, issued on Aug 23, 2019. Check the license (Massachusetts PA8965, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Zachary R. Witter
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA8965 MA
Self-reported in NPPES; status is on the state search - Practice location
- 22 Patriot PL, Foxborough, MA 02035
- Phone
- (508) 718-4050
- Enumerated
- Aug 23, 2019
- Record last updated
- Jan 11, 2023
- Fax
- (508) 718-4051
- Medicare enrollment
- Enrolled (PECOS I20221108001837); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 22 Patriot PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sheila Adjei Poku, RPH, BCOPOncology Pharmacist1578414397
- Jessica BrensFamily Nurse Practitioner1316425481
- Nicole HoughtonRegistered Nurse1386508778
- Elijah HuangPhysical Therapist1366314106
- Megan PageOncology Registered Nurse1609723303
- Jonathan Wischhusen, M.D.Medical Oncology Physician1770930588
Verify Zachary R. Witter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA8965Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% more Medicare Part D claims than the average physician assistant in 2024
1,500 Medicare Part D claims for 242 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 76 claims were for opioids.
Most prescribed
- Atorvastatin Calcium130 claims
- Amlodipine Besylate105 claims
- Lisinopril73 claims
- Gabapentin71 claims
- Losartan Potassium58 claims
- Levothyroxine Sodium48 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
- Brigham And Womens Physicians Organization IncFoxborough, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
10 physician assistant records list a practice address in Foxborough
They are 10 of the 155 NPPES records with a practice address in Foxborough, and 4,713 physician assistant records in Massachusetts.
All 10 in Foxborough → All 4,713 in Massachusetts → Every provider in Foxborough →
Other physician assistant records in Massachusetts
- Erin Abdallah, PA-CSwansea, MA1396417242
- Alexa Aboshar, PA-CTewksbury, MA1245623578
- Bhraana Abraham, PABoston, MA1649963661
- Keidelyn Abreu, PALawrence, MA1497488795
- Tatiana Achildiev, PAWorcester, MA1740532761
- Sophie Achilles, PA-CBoston, MA1992485965
- Andrea Acosta, PA-CWest Roxbury, MA1336060953
- Colin ActonBoston, MA1346066701
- Emily Adams, PA-CBurlington, MA1457685752
- Karley Adams, PABoston, MA1578261764
Common questions
What is Zachary R. Witter, PA's NPI number?
Zachary R. Witter, PA's National Provider Identifier (NPI) is 1174170112, issued on Aug 23, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Zachary R. Witter, PA located?
The NPPES record lists a practice address at 22 Patriot PL, Foxborough, MA, 02035. Phone: (508) 718-4050. Providers update this record themselves, so call before visiting.
How can I verify Zachary R. Witter, PA's license?
NPPES lists Massachusetts license number PA8965, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Zachary R. Witter, PA prescribe under Medicare Part D?
In 2024, Zachary R. Witter, PA had 1,500 Medicare Part D claims for 242 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.