Karen A. Casper, M.D.
Emergency Medicine Physician · Oak Bluffs, MA
Karen A. Casper, M.D. is an emergency medicine physician with a practice address in Oak Bluffs, Massachusetts, and NPI 1962518738, issued on Aug 22, 2006. Check the license (Massachusetts 159397, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Karen A. Casper
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 159397 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Hospital RD, Oak Bluffs, MA 02557
- Phone
- (508) 957-0111
- Enumerated
- Aug 22, 2006
- Record last updated
- Oct 25, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120202000437); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1995
- 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.
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- Anne-Marie Bell, FNP-CFamily Nurse Practitioner1508249848
- Linsay BumilaNurse Practitioner1659906444
- Paula Caron, RPHPharmacist1407688328
Verify Karen A. Casper in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 159397Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average emergency medicine physician in 2024
55 Medicare Part D claims for 43 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
One hospital affiliation
- Martha's Vineyard Hospital IncOak Bluffs, MA · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Karen A. Casper among 1,829 emergency medicine physician records in Massachusetts
Karen A. Casper, 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 fileYes · 66% of these records are
- Graduated1995 · median 2011 among the 1,200 with a school on file
- Record last updated2011 · 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
- 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
- Jeffrey Zack, M.D.Oak Bluffs, MA 025571578584314
- Janine Albert, M.D.Nantucket, MA 025541629395991
- Tamara Dildy, MDNantucket, MA 025541306804000
- Lisa Flaherty, D.ONantucket, MA 025541649490400
Common questions
What is Karen A. Casper, M.D.'s NPI number?
Karen A. Casper, M.D.'s National Provider Identifier (NPI) is 1962518738, issued on Aug 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen A. Casper, M.D. located?
The NPPES record lists a practice address at 1 Hospital RD, Oak Bluffs, MA, 02557. Phone: (508) 957-0111. Providers update this record themselves, so call before visiting.
How can I verify Karen A. Casper, M.D.'s license?
NPPES lists Massachusetts license number 159397, 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 Karen A. Casper, M.D. prescribe under Medicare Part D?
In 2024, Karen A. Casper, M.D. had 55 Medicare Part D claims for 43 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.