Margaret B. Allison, MD,PHD
Critical Care Medicine (Internal Medicine) Physician · Boston, MA
Margaret B. Allison, MD,PHD is a critical care medicine (internal medicine) physician with a practice address in Boston, Massachusetts, and NPI 1114447398, issued on Jun 20, 2017. Check the license (Massachusetts 271186, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Margaret B. Allison
- Credential
- MD,PHD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 271186 MA
Self-reported in NPPES; status is on the state search - Practice location
- Massachusetts General Hospital, Boston, MA 02114
- Phone
- (617) 643-0596
- Enumerated
- Jun 20, 2017
- Record last updated
- Apr 10, 2023
- Medicare enrollment
- Enrolled (PECOS I20230522001650); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2017
- Entity
- Type 1 · individual
Also registered at Massachusetts General Hospital
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret B. Allison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 271186Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
15 Medicare Part D claims, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 73% of 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.
Bills Medicare through 3 group practices
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
- Massachusetts General Physicians Organization IncBoston, MA
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Massachusetts
There are 157 critical care medicine (internal medicine) physician records in Massachusetts.
Other critical care medicine (internal medicine) physician records in Massachusetts
- Renu Agarwal, MD FCCPGreat Barrington, MA1639121593
- Padmastuti Akella, MDWorcester, MA1467988873
- Salvador Albanese, M.D.Woburn, MA1437130630
- Jamie Allen, D.O.North Andover, MA1194187435
- Joshua Allgaier, D.O.Springfield, MA1215390588
- Hafez Alsmaan, MDPittsfield, MA1780857912
- Ahmad Alwassia, MDNorth Dartmouth, MA1700149366
- Rupenkumar Amin, M.D.Concord, MA1568625820
- Elias Baedorf Kassis, M.D.Boston, MA1225358799
- Arvind Bansal, MDFall River, MA1154408342
Common questions
What is Margaret B. Allison, MD,PHD's NPI number?
Margaret B. Allison, MD,PHD's National Provider Identifier (NPI) is 1114447398, issued on Jun 20, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Margaret B. Allison, MD,PHD located?
The NPPES record lists a practice address at Massachusetts General Hospital, Boston, MA, 02114. Phone: (617) 643-0596. Providers update this record themselves, so call before visiting.
How can I verify Margaret B. Allison, MD,PHD's license?
NPPES lists Massachusetts license number 271186, 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 Margaret B. Allison, MD,PHD prescribe under Medicare Part D?
In 2024, Margaret B. Allison, MD,PHD had 15 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.