Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

David Aaron Hammer, MD

Individual provider Neurology Physician · NPI 1811307507

David Aaron Hammer, MD practises Neurology in Philadelphia, Pennsylvania. Qualified in 2014, 12 years ago. Practices with Einstein Practice Plan Inc, a 764-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and Pennsylvania.

Years since qualifying
12
Licensed in
MA, PA
In the registry since
2014
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5401 Old York Rd Ste 404
Philadelphia, PA 19141-3046
Phone: (215) 456-7190
Fax: (215) 456-7308
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence MD469935 (PA)
Neurology Physician Taxonomy 2084N0400X · Licence 262653 (MA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence M0218005 (PA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1811307507
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 2, 2014
Last updated in NPPESJuly 7, 2021
Certification dateJuly 7, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROLOGY
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Einstein Practice Plan Inc — 764 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients316
Services billed 501 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $526 25 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Jefferson Einstein Montgomery Hospital Hospital · East Norriton, PA
  • Jefferson Einstein Philadelphia Hospital Hospital · Philadelphia, PA

Colleagues at Einstein Practice Plan Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 764 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia