Alexandra Lynn Larsen, MD, MSC
Internal Medicine Physician · Philadelphia, PA
Alexandra Lynn Larsen, MD, MSC is an internal medicine physician with a practice address in Philadelphia, Pennsylvania, and NPI 1437853173, issued on Mar 28, 2023. Check the license (Pennsylvania MD494368, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Alexandra Lynn Larsen
- Credential
- MD, MSC
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD494368 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Spruce St, Philadelphia, PA 19104
- Phone
- (215) 662-9990
- Enumerated
- Mar 28, 2023
- Record last updated
- Jun 8, 2026
- Fax
- (215) 243-3297
- Medicare enrollment
- Enrolled (PECOS I20260529000535); may accept Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 3400 Spruce St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Abbott, CRNPNurse Practitioner1396771689
- Michael Abboud, MDEmergency Medicine Physician1962820852
- Emily AbdelmessihPediatric Pharmacist1891612560
- Mohammed AbdullahStudent in an Organized Health Care Education/Training Program1013595495
- Amin Abedini, MDStudent in an Organized Health Care Education/Training Program1912609017
- Farid Aboharb, MD, PHDStudent in an Organized Health Care Education/Training Program1295595973
Verify Alexandra Lynn Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD494368Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
409 Medicare Part D claims for 85 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium29 claims
- Gabapentin20 claims
- Finasteride14 claims
- Ozempic14 claims
- Mirtazapine13 claims
- Allopurinol12 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.
Alexandra Lynn Larsen among 7,300 internal medicine physician records in Pennsylvania
Alexandra Lynn Larsen, MD, MSC is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 89% of them.
- NPI issued2023 · 89% of these records are older, 7% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2023 · median 2008 among the 4,208 with a school on file
- Record last updated2026 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,855 internal medicine physician records list a practice address in Philadelphia
They are 1,855 of the 42,849 NPPES records with a practice address in Philadelphia, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Philadelphia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amy Behrman, MDPhiladelphia, PA 191041851331870
- Martin Bohnenkamp, MDPhiladelphia, PA 191041770528259
- John Bruza, MDPhiladelphia, PA 191041093758310
- Jill Clemmer, MDPhiladelphia, PA 191041477594562
- John Flamma, MDPhiladelphia, PA 191041477500296
- Kevin Fosnocht, MDPhiladelphia, PA 191041003842709
- William Gilhool, DOPhiladelphia, PA 191041982606919
- Bruce Kinosian, MDPhiladelphia, PA 191041871536177
Common questions
What is Alexandra Lynn Larsen, MD, MSC's NPI number?
Alexandra Lynn Larsen, MD, MSC's National Provider Identifier (NPI) is 1437853173, issued on Mar 28, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra Lynn Larsen, MD, MSC located?
The NPPES record lists a practice address at 3400 Spruce St, Philadelphia, PA, 19104. Phone: (215) 662-9990. Providers update this record themselves, so call before visiting.
How can I verify Alexandra Lynn Larsen, MD, MSC's license?
NPPES lists Pennsylvania license number MD494368, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexandra Lynn Larsen, MD, MSC prescribe under Medicare Part D?
In 2024, Alexandra Lynn Larsen, MD, MSC had 409 Medicare Part D claims for 85 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.