Jonathan D. Vacik, MD
Emergency Medicine Physician · Ayer, MA
Jonathan D. Vacik, MD is an emergency medicine physician with a practice address in Ayer, Massachusetts, and NPI 1528129640, issued on Dec 12, 2006. Check the license (Massachusetts 220308, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jonathan D. Vacik
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 220308 MA
12824 NH
Self-reported in NPPES; status is on the state search - Practice location
- 200 Groton RD, Ayer, MA 01432
- Phone
- (978) 784-9000
- Enumerated
- Dec 12, 2006
- Record last updated
- Nov 30, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 110039191A MA
- Medicare enrollment
- Enrolled (PECOS I20231121001706); accepts Medicare assignment
- Medical or professional school
- University Of South Alabama College Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 200 Groton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Marie Bennett, FNP-BCFamily Nurse Practitioner1215376405
- Colin Blake, MDAnesthesiology Physician1770565657
- Jessica Blood, RDRegistered Dietitian1174114672
Verify Jonathan D. Vacik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220308Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average emergency medicine physician in 2024
97 Medicare Part D claims for 67 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Oxycodone Hcl12 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 2 group practices
- Northeastern Vermont Regional Hospital IncSaint Johnsbury, VT
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan D. Vacik among 1,829 emergency medicine physician records in Massachusetts
Jonathan D. Vacik, MD is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2001 · median 2011 among the 1,200 with a school on file
- Record last updated2020 · 57% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 emergency medicine physician records list a practice address in Ayer
They are 2 of the 118 NPPES records with a practice address in Ayer, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Ayer → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Richard Lyons, M.D.Ayer, MA 014321154463867
- Sarah Gilbert, MDGardner, MA 014401205915212
- Allison Goulet-ScottGardner, MA 014401750917621
- Vernon Kellog, MDGardner, MA 014401144341470
- Ellen Ray, M.D.Gardner, MA 014401285624353
- Michael Shear, MDGardner, MA 014401407016520
- John Skrzypczak, M.D.Gardner, MA 014401194715268
- Kirana Weeratne, M.D.Gardner, MA 014401801069208
Common questions
What is Jonathan D. Vacik, MD's NPI number?
Jonathan D. Vacik, MD's National Provider Identifier (NPI) is 1528129640, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan D. Vacik, MD located?
The NPPES record lists a practice address at 200 Groton RD, Ayer, MA, 01432. Phone: (978) 784-9000. Providers update this record themselves, so call before visiting.
How can I verify Jonathan D. Vacik, MD's license?
NPPES lists Massachusetts license number 220308, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan D. Vacik, MD prescribe under Medicare Part D?
In 2024, Jonathan D. Vacik, MD had 97 Medicare Part D claims for 67 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.