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ALEXANDRA LYNN LARSEN MD, MSC
NPI 1437853173
Internal Medicine in Philadelphia, PA

Active since March 28, 2023PECOS Enrolled
3400 SPRUCE ST, PHILADELPHIA, PA 19104(215) 662-9990(215) 243-3297 Get Directions Write a Review

NPPES record last updated: June 8, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 14, 2023, Mar 28, 2023 (2 updates tracked since 2023).

About Alexandra Lynn Larsen Md, Msc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALEXANDRA LYNN LARSEN MD, MSC (NPI 1437853173) is an individual internal medicine provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD494368) and active in the NPI registry since March 2023. She is enrolled in Medicare PECOS and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2023).

NPPES Registry Identity

NPI1437853173
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameALEXANDRA LYNN LARSENCredential: MD, MSC
Location Address3400 SPRUCE STPhiladelphia, PA 19104-4238
Mailing Address3400 Spruce StPhiladelphia, PA 19104-4238
Phone(215) 662-9990
Fax(215) 243-3297
Sole ProprietorNo
Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 2023
Enumeration DateMarch 28, 2023
Last NPPES UpdateJune 8, 20262 updates tracked since enumeration
NPPES CertifiedJune 8, 2026
✔ NPI 1437853173 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · MD494368
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
3400 SPRUCE ST, Philadelphia, PA 19104
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexandra Lynn Larsen Md, Msc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID345600284
PECOS Enrollment IDI20260529000535
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$137.17 typical visit price
range $59.88 – $180.99
Typical copayment $34.29 (range $14.97 – $45.24)
Most-billed visit code 99204
Established Patient
$105.21 typical visit price
range $19.30 – $147.29
Typical copayment $26.30 (range $4.82 – $36.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ELIZABETH FOGLIA MD
Pediatrics
3400 SPRUCE ST, 8 RAVDIN
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3228
JOEL M STEIN MD
Radiology (Diagnostic Radiology)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3005
PRISCILLA NELSON M.D.
Anesthesiology
3400 SPRUCE ST, 6 DULLES
PHILADELPHIA, PA 19104
Philadelphia County (215) 349-8310
DR. JASON THOMAS ACKRIVO MD
Internal Medicine (Pulmonary Disease)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 614-0871
JEAN-PHILIPPE RICHARD DMD
Student in an Organized Health Care Education/Training Program
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-6176
LEAH M LOPEZ PA-C
Physician Assistant (Medical)
3400 SPRUCE ST, 4 SILVERSTEIN
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-7870
JOANIE M GARRATT MD
Radiology (Diagnostic Radiology)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3000
JENNIFER DEKERLEGAND
Physical Therapist
3400 SPRUCE ST, 1 WHITE BUILDING
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3265

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alexandra Larsen's NPI number?

The NPI number for Alexandra Larsen is 1437853173. It was assigned to this individual provider in the NPPES registry on March 28, 2023.

Where is Alexandra Larsen located?

Alexandra Larsen practices at 3400 Spruce St, Philadelphia, PA 19104. The listed phone number is (215) 662-9990.

What is Alexandra Larsen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Alexandra Larsen enrolled in Medicare?

Yes. Alexandra Larsen is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Alexandra Larsen was last updated on June 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.