Erin Marie Theisen, MD, PHD
Dermatology Physician · Boston, MA
Erin Marie Theisen, MD, PHD is a dermatology physician with a practice address in Boston, Massachusetts, and NPI 1548720287, issued on Mar 20, 2019. Check the license (Massachusetts 1013754, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Erin Marie Theisen
- Credential
- MD, PHD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 1013754 MA
Self-reported in NPPES; status is on the state search - Practice location
- 221 Longwood Ave, Boston, MA 02115
- Phone
- (617) 732-4918
- Enumerated
- Mar 20, 2019
- Record last updated
- Aug 24, 2023
- Medicare enrollment
- Enrolled (PECOS I20230421001942); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 627 in Massachusetts → Look up another NPI →
Also registered at 221 Longwood Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Erin Marie Theisen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1013754Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average dermatology physician in 2024
321 Medicare Part D claims for 94 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Ketoconazole37 claims
- Dupixent Pen32 claims
- Triamcinolone Acetonide28 claims
- Clobetasol Propionate24 claims
- Prednisone20 claims
- Dupixent Syringe15 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).
Erin Marie Theisen among 627 dermatology physician records in Massachusetts
Erin Marie Theisen, MD, PHD 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 2019, is newer than 83% of them.
- NPI issued2019 · 83% of these records are older, 13% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2019 · median 2008 among the 445 with a school on file
- Record last updated2023 · 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
- Niroshana Anandasabapathy, MD PHDBoston, MA 021151316145717
- Susan Burgin, M.D.Boston, MA 021151174580906
- Elizabeth Buzney, MDBoston, MA 021151881720621
- Lynda Chin, M.D.Boston, MA 021151437210143
- Caroline Kim, M.D.Boston, MA 021151386602753
- Kubinne Kim, MDBoston, MA 021151437341401
- Thomas Kupper, MDBoston, MA 021151548227945
- Vincent Li, MDBoston, MA 021151427093624
Common questions
What is Erin Marie Theisen, MD, PHD's NPI number?
Erin Marie Theisen, MD, PHD's National Provider Identifier (NPI) is 1548720287, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Erin Marie Theisen, MD, PHD located?
The NPPES record lists a practice address at 221 Longwood Ave, Boston, MA, 02115. Phone: (617) 732-4918. Providers update this record themselves, so call before visiting.
How can I verify Erin Marie Theisen, MD, PHD's license?
NPPES lists Massachusetts license number 1013754, 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 Erin Marie Theisen, MD, PHD prescribe under Medicare Part D?
In 2024, Erin Marie Theisen, MD, PHD had 321 Medicare Part D claims for 94 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.