JONATHAN D. VACIK MD
NPI 1528129640
Emergency Medicine in Ayer, MA
About Jonathan D. Vacik Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JONATHAN D. VACIK MD (NPI 1528129640) is an individual emergency medicine provider in Ayer, Massachusetts, licensed in Massachusetts (220308) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthalliance Hospitals, and maintains 7 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 7
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Jonathan D. Vacik Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Jonathan Vacik reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ayer, MA 01432
- Reassigned Medicare billing, Massachusetts enrollment
- 290 clinicians in this Medicare group
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Springfield, VT 05156
- Reassigned Medicare billing, Vermont enrollment
- 153 clinicians in this Medicare group
Woodsville, NH 03785
- Reassigned Medicare billing, New Hampshire enrollment
- 26 clinicians in this Medicare group
St Johnsbury, VT 05819
- Reassigned Medicare billing, Vermont enrollment
- Also billed through NPI 1174566541 (Vermont)
- 52 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Umass Memorial Healthalliance Hospitals
Acute Care Hospitals · Leominster, MANortheastern Vermont Regional Hospital
Critical Access Hospitals · Saint Johnsbury, VTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01432 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
AYER, MA 01432
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jonathan Vacik's NPI number?
The NPI number for Jonathan Vacik is 1528129640. It was assigned to this individual provider in the NPPES registry on December 12, 2006.
Where is Jonathan Vacik located?
Jonathan Vacik practices at 200 Groton Rd, Ayer, MA 01432. The listed phone number is (978) 784-9000.
What is Jonathan Vacik's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Jonathan Vacik enrolled in Medicare?
Yes. Jonathan Vacik is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jonathan Vacik's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Vacik reassigns Medicare benefits to 5 organizations: Steward Emergency Physicians, Inc (Ayer, MA), Umass Memorial Medical Group Inc (Worcester, MA), Springfield Hospital (Springfield, VT), Cottage Hospital (Woodsville, NH) and Northeastern Vermont Regional Hospital Inc. (St Johnsbury, VT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jonathan Vacik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Jonathan Vacik affiliated with any hospitals?
According to CMS data, Jonathan Vacik is affiliated with Umass Memorial Healthalliance Hospitals and Northeastern Vermont Regional Hospital.
When was this NPI record last updated?
The NPPES record for Jonathan Vacik was last updated on November 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Jonathan D. Vacik, MD · NPI 1528129640
Emergency Medicine physician in Ayer, Massachusetts. Individual provider, active in the CMS NPPES registry since December 12, 2006.
## Identity
- **NPI:** 1528129640 (Entity type: Individual)
- **Enumerated:** December 12, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 220308 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 GROTON RD, Ayer, MA 01432-1168
- **Phone:** (978) 784-9000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Steward Emergency Physicians, Inc (NPI 1780971275, Ayer, MA); Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Springfield Hospital (NPI 1033225875, Springfield, VT); Cottage Hospital (NPI 1528162799, Woodsville, NH); Northeastern Vermont Regional Hospital Inc. (NPI 1710631635, St Johnsbury, VT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Alabama College Of Medicine, class of 2001
## Record status
- **NPPES last updated:** November 30, 2020
- **Other identifiers:** Medicaid 110039191A (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1528129640) · Data from the CMS NPPES public registry.