Stephanie Johanna Mascia, M.D., M.P.H
Internal Medicine Physician · Cambridge, MA
Stephanie Johanna Mascia, M.D., M.P.H is an internal medicine physician with a practice address in Cambridge, Massachusetts, and NPI 1922413582, issued on Jun 23, 2014. Check the license on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Stephanie Johanna Mascia
- Credential
- M.D., M.P.H
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 625 Mount Auburn St Ste 104, Cambridge, MA 02138
- Phone
- (617) 491-5586
- Enumerated
- Jun 23, 2014
- Record last updated
- Jul 21, 2022
- Fax
- (617) 661-5995
- Medicare enrollment
- Enrolled (PECOS I20180830001065); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 625 Mount Auburn St Ste 104
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Naira Aleksanyan, FNP-BCFamily Nurse Practitioner1558968461
- Nagma Kc, FNP-CFamily Nurse Practitioner1346783669
- Olivia O'Shea, AGNP-CAdult Health Nurse Practitioner1114805116
- Robert Scaffidi, M.D.Internal Medicine Physician1538397823
- Hamna Umar, MDInternal Medicine Physician1497195465
Verify Stephanie Johanna Mascia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,484 Medicare Part D claims for 291 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Atorvastatin Calcium171 claims
- Amlodipine Besylate108 claims
- Lisinopril98 claims
- Levothyroxine Sodium79 claims
- Hydrochlorothiazide55 claims
- Lorazepam51 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 one group practice
- Brigham And Womens Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
300 internal medicine physician records list a practice address in Cambridge
They are 300 of the 5,145 NPPES records with a practice address in Cambridge, and 6,825 internal medicine physician records in Massachusetts.
All 300 in Cambridge → All 6,825 in Massachusetts → Every provider in Cambridge →
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- Samah Abdallah, MDBrighton, MA1730814971
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- Mohab AbdelhalimBoston, MA1871388496
Common questions
What is Stephanie Johanna Mascia, M.D., M.P.H's NPI number?
Stephanie Johanna Mascia, M.D., M.P.H's National Provider Identifier (NPI) is 1922413582, issued on Jun 23, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Johanna Mascia, M.D., M.P.H located?
The NPPES record lists a practice address at 625 Mount Auburn St Ste 104, Cambridge, MA, 02138. Phone: (617) 491-5586. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Johanna Mascia, M.D., M.P.H's license?
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 Stephanie Johanna Mascia, M.D., M.P.H prescribe under Medicare Part D?
In 2024, Stephanie Johanna Mascia, M.D., M.P.H had 1,484 Medicare Part D claims for 291 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.