Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan D. Vacik, MD

Emergency Medicine Physician in Ayer, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1528129640

Verified

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Registry record

Entity type Individual (Type 1)

Name Jonathan D. Vacik

Credential MD

Sex Male

Practice address 200 Groton Rd, Ayer, MA, 01432

Phone (978) 784-9000

Enumeration date Dec 12, 2006

Last updated in NPPES Nov 30, 2020

Taxonomy & licenses

207PE0004X Emergency Medical Services (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 12824 (NH) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 220308 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
110039191A	Medicaid	MA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Jonathan Vacik's NPI record?

Cross-check NPI 1528129640 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1528129640 active?

Yes, as of the latest NPPES snapshot, NPI 1528129640 is active (record last updated 2020-11-30).

Other providers at this practice address

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Essent Healthcare - Ayer, Inc. General Acute Care Hospital · Ayer, MA NPI 1164427431 Susan Lucas Internal Medicine Physician · Ayer, MA NPI 1497744676 Nashoba Valley Healthcare Group Inc Family Medicine Physician · Ayer, MA NPI 1174513071 Magdy Salama Anatomic Pathology Physician · Ayer, MA NPI 1215918057 Colin Blake Anesthesiology Physician · Ayer, MA NPI 1770565657 Mary Bakalos Diagnostic Radiology Physician · Ayer, MA NPI 1629036090 Sanjay Basu Internal Medicine Physician · Ayer, MA NPI 1285682450 Naomi Sawyer Nurse Practitioner · Ayer, MA NPI 1730138199

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-30.