Katherine Olivia Brag, M.D.
Dermatology Physician · Boston, MA
Katherine Olivia Brag, M.D. is a dermatology physician with a practice address in Boston, Massachusetts, and NPI 1568857233, issued on Mar 31, 2015. Check the license on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Olivia Brag
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 312694 LA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brooline Avenue, Boston, MA 02215
- Phone
- (203) 216-3833
- Enumerated
- Mar 31, 2015
- Record last updated
- Dec 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200921001782); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 627 in Massachusetts → Look up another NPI →
Verify Katherine Olivia Brag 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
7% more Medicare Part D claims than the average dermatology physician in 2024
854 Medicare Part D claims for 245 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Triamcinolone Acetonide74 claims
- Dupixent Pen67 claims
- Ketoconazole57 claims
- Minoxidil49 claims
- Otezla36 claims
- Betamethasone Dipropionate34 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
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Olivia Brag among 627 dermatology physician records in Massachusetts
Katherine Olivia Brag, M.D. is one of 627 dermatology physician records with a practice address in Massachusetts. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 70% of them.
- NPI issued2015 · 70% of these records are older, 26% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2015 · median 2008 among the 445 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Massachusetts
There are 627 dermatology physician records in Massachusetts.
All 627 in Massachusetts → Every provider in Boston → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Michael Bigby, M.D.Boston, MA 022151447201850
- Teresa Borkowski, M.D.Boston, MA 022151568496313
- Peter Chien, MD, PHDBoston, MA 022151609089077
- Anthony Cukras, M.D., PH.D.Boston, MA 022151154465540
- Erica Dommasch, MDBoston, MA 022151003136771
- Farhana Jan, M.D.Boston, MA 022151558422584
- Alexandra Kimball, MD MPHBoston, MA 022151073503603
- Martina Porter, MDBoston, MA 022151871931618
Common questions
What is Katherine Olivia Brag, M.D.'s NPI number?
Katherine Olivia Brag, M.D.'s National Provider Identifier (NPI) is 1568857233, issued on Mar 31, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Olivia Brag, M.D. located?
The NPPES record lists a practice address at 330 Brooline Avenue, Boston, MA, 02215. Phone: (203) 216-3833. Providers update this record themselves, so call before visiting.
How can I verify Katherine Olivia Brag, M.D.'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 Katherine Olivia Brag, M.D. prescribe under Medicare Part D?
In 2024, Katherine Olivia Brag, M.D. had 854 Medicare Part D claims for 245 beneficiaries; the average among dermatology physician prescribers was 797. 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.