Sarah Katharine Larsen, MD
Family Medicine Physician · Boston, MA
Sarah Katharine Larsen, MD is a family medicine physician with a practice address in Boston, Massachusetts, and NPI 1134756505, issued on Mar 25, 2020. Check the license (Massachusetts 1016228, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Sarah Katharine Larsen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 1016228 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1340 Boylston St, Boston, MA 02215
- Phone
- (617) 267-0900
- Enumerated
- Mar 25, 2020
- Record last updated
- Oct 30, 2023
- Medicare enrollment
- Enrolled (PECOS I20240403000283); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,265 in Massachusetts → Look up another NPI →
Also registered at 1340 Boylston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Adelstein, MDFamily Medicine Physician1306822416
- Emily Aduba, FNP-BCFamily Nurse Practitioner1831617315
- Adam Albano, M.D.Internal Medicine Physician1558689828
- Christopher Alonzo, M.D., MPHInternal Medicine Physician1265812226
- Isabella Anderson, MSWSocial Worker1528701315
- Sophia AxtmanFamily Nurse Practitioner1902452022
Verify Sarah Katharine Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1016228Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average family medicine physician in 2024
1,069 Medicare Part D claims for 112 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 39 claims were for opioids.
Most prescribed
- Atorvastatin Calcium49 claims
- Testosterone34 claims
- Albuterol Sulfate Hfa32 claims
- Metoprolol Succinate32 claims
- Omeprazole28 claims
- Oxycodone Hcl27 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).
Sarah Katharine Larsen among 2,265 family medicine physician records in Massachusetts
Sarah Katharine Larsen, MD is one of 2,265 family medicine physician records with a practice address in Massachusetts. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2020 · median 2006 among the 1,529 with a school on file
- Record last updated2023 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Massachusetts
There are 2,265 family medicine physician records in Massachusetts.
All 2,265 in Massachusetts → Every provider in Boston → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Pamela Adelstein, MDBoston, MA 022151306822416
- Joseph Baker, MD, MPHBoston, MA 022151144338138
- Ethan Brackett, M.D.Boston, MA 022151912970633
- David Buckle, MDBoston, MA 022151013905108
- Timothy Cavanaugh, M.D.Boston, MA 022151770503831
- Kit Chan, MDBoston, MA 022151528116571
- Jennifer Childs-Roshak, M.D.Boston, MA 022151497780779
- Karen Kelly, M.D.Boston, MA 022151821265729
Common questions
What is Sarah Katharine Larsen, MD's NPI number?
Sarah Katharine Larsen, MD's National Provider Identifier (NPI) is 1134756505, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Katharine Larsen, MD located?
The NPPES record lists a practice address at 1340 Boylston St, Boston, MA, 02215. Phone: (617) 267-0900. Providers update this record themselves, so call before visiting.
How can I verify Sarah Katharine Larsen, MD's license?
NPPES lists Massachusetts license number 1016228, 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 Sarah Katharine Larsen, MD prescribe under Medicare Part D?
In 2024, Sarah Katharine Larsen, MD had 1,069 Medicare Part D claims for 112 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.