Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Amy Susan Duffield, MD, PHD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1144370255

Dr. Amy Susan Duffield, MD, PHD practises Pathology in New York, New York. Graduated from Yale University School of Medicine in 2005, 21 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 2,791-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Maryland and New York.

Years since qualifying
21
Trained at
Yale University School of Medicine
Licensed in
MD, NY
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1275 York Ave
New York, NY 10065-6007
Phone: (212) 639-5900
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 600 N Wolfe St, Baltimore, MD 21287-0005 — (410) 955-3980
  • 1 Gustave L Levy Pl, New York, NY 10029-6504 — (212) 241-5609

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 302648 (NY)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence D70962 (MD)

Record details

NPI number1144370255
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedJanuary 11, 2007
Last updated in NPPESJune 18, 2026
Certification dateJune 18, 2026

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Also practisesDERMATOLOGY
Medical schoolYALE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 2791 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients286
Services billed 2,446 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Icahn School of Medicine at Mount Sinai

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2791 clinicians in the practice; 12 are shown here.

Other providers in New York