Jeffrey R. Zack, M.D.
Emergency Medicine Physician · Oak Bluffs, MA
Jeffrey R. Zack, M.D. is an emergency medicine physician with a practice address in Oak Bluffs, Massachusetts, and NPI 1578584314, issued on Jul 21, 2006. Check the license (Massachusetts 213570, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jeffrey R. Zack
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 213570 MA
MD10339 RI
Self-reported in NPPES; status is on the state search - Practice location
- 1 Hospital RD., Oak Bluffs, MA 02557
- Phone
- (508) 693-0410
- Enumerated
- Jul 21, 2006
- Record last updated
- Nov 25, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 7008366 RI
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 1 Hospital RD.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Briody, PAPhysician Assistant1346397692
Verify Jeffrey R. Zack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 213570Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 83% of the cost of the top drugs
886 Medicare Part D claims for 425 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 56% of claims. 19 claims were for opioids.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Arexvy221 claims
- Shingrix108 claims
- Adacel Tdap84 claims
- Rosuvastatin Calcium28 claims
- Famotidine25 claims
- Levothyroxine Sodium21 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.
Jeffrey R. Zack among 1,829 emergency medicine physician records in Massachusetts
Jeffrey R. Zack, M.D. 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 fileNo · 66% of these records are
- Record last updated2014 · 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).
6 emergency medicine physician records list a practice address in Oak Bluffs
They are 6 of the 143 NPPES records with a practice address in Oak Bluffs, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Oak Bluffs → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Karen Casper, M.D.Oak Bluffs, MA 025571962518738
- Jeffrey Horenstein, M.D., PH.D.Oak Bluffs, MA 025571073834081
- Katherine Stedman, M.D.Oak Bluffs, MA 025571386847754
- Lisa Vieira-Salvatore, MDOak Bluffs, MA 025571437175106
- Alamjit Virk, MDOak Bluffs, MA 025571720132731
- Janine Albert, M.D.Nantucket, MA 025541629395991
- Tamara Dildy, MDNantucket, MA 025541306804000
- Lisa Flaherty, D.ONantucket, MA 025541649490400
Common questions
What is Jeffrey R. Zack, M.D.'s NPI number?
Jeffrey R. Zack, M.D.'s National Provider Identifier (NPI) is 1578584314, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey R. Zack, M.D. located?
The NPPES record lists a practice address at 1 Hospital RD., Oak Bluffs, MA, 02557. Phone: (508) 693-0410. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey R. Zack, M.D.'s license?
NPPES lists Massachusetts license number 213570, 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 Jeffrey R. Zack, M.D. prescribe under Medicare Part D?
In 2024, Jeffrey R. Zack, M.D. had 886 Medicare Part D claims for 425 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.