Karen Casper, M.D.
Emergency Medicine Physician · Oak Bluffs, MA
Karen 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 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
- Entity
- Type 1 · individual
Also registered at 1 Hospital RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Absar, M.D.Behavioral Neurology & Neuropsychiatry Physician1144267857
- David Araujo, LMHCMental Health Counselor1134429533
- Ruth Barron, MDPsychiatry Physician1649340712
- Anne-Marie Bell, FNP-CFamily Nurse Practitioner1508249848
- Linsay BumilaRegistered Nurse1659906444
- Paula Caron, RPHPharmacist1407688328
Verify Karen 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
85% 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 355 among the 49,029 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 or facility affiliation
- Martha's Vineyard Hospital IncOak Bluffs, MA · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
6 emergency medicine physician records list a Oak Bluffs practice address
They are 6 of the 143 NPPES records with a Oak Bluffs practice address, and 1,763 emergency medicine physician records in Massachusetts.
All 6 in Oak Bluffs → All 1,763 in Massachusetts → Every provider in Oak Bluffs →
Other emergency medicine physician records in Massachusetts
- Emily Aaronson, M.D.Boston, MA1962791558
- Sharif Abdel Jalil, PHARM. D., MDWorcester, MA1649795758
- Menahem Abraham, M.D.Beverly, MA1720113889
- Aser AbrhaBoston, MA1568102796
- Jorge Acevedo Herman, MDWorcester, MA1447955000
- Matthew Adamo, DOFalmouth, MA1912446972
- Austin AdamsBoston, MA1861139388
- Sapana Adhikari, M.D.Boston, MA1902870694
- Jamie Adler, MDBoston, MA1659765790
- Jonathan Adler, MDBoston, MA1609851500
Common questions
What is Karen Casper, M.D.'s NPI number?
Karen 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 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 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://www.mass.gov/orgs/board-of-registration-in-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen Casper, M.D. prescribe under Medicare Part D?
In 2024, Karen Casper, M.D. had 55 Medicare Part D claims for 43 beneficiaries; the average among emergency medicine physician prescribers was 355. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.