Rebecca Saff, MD, PHD
Internal Medicine Physician · Boston, MA
Rebecca Saff, MD, PHD is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1306041983, issued on Jun 15, 2007. Check the license (Massachusetts L-232242, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Rebecca Saff
- Credential
- MD, PHD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- L-232242 MA
Self-reported in NPPES; status is on the state search - Practice location
- Massachusetts General Hospital, Boston, MA 02114
- Phone
- (617) 726-2066
- Enumerated
- Jun 15, 2007
- 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 Rebecca Saff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license L-232242Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
63% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,035 Medicare Part D claims for 161 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.
Most prescribed
- Dupixent Pen98 claims
- Albuterol Sulfate Hfa71 claims
- Dupixent Syringe62 claims
- Montelukast Sodium58 claims
- Prednisone55 claims
- Tezspire46 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.
One hospital or facility affiliation
- Massachusetts General Physicians Organization IncBoston, MA
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.
3,060 internal medicine physician records list a Boston practice address
They are 3,060 of the 41,865 NPPES records with a Boston practice address, and 7,865 internal medicine physician records in Massachusetts.
All 3,060 in Boston → All 7,865 in Massachusetts → Every provider in Boston →
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Common questions
What is Rebecca Saff, MD, PHD's NPI number?
Rebecca Saff, MD, PHD's National Provider Identifier (NPI) is 1306041983, issued on Jun 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Saff, MD, PHD located?
The NPPES record lists a practice address at Massachusetts General Hospital, Boston, MA, 02114. Phone: (617) 726-2066. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Saff, MD, PHD's license?
NPPES lists Massachusetts license number L-232242, 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 Rebecca Saff, MD, PHD prescribe under Medicare Part D?
In 2024, Rebecca Saff, MD, PHD had 1,035 Medicare Part D claims for 161 beneficiaries; the average among internal medicine physician prescribers was 2,785. 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.