Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Frederick Lorenz Thum III, MD

Individual provider Emergency Medicine Physician · NPI 1063438521

Dr. Frederick Lorenz Thum III, MD practises Emergency Medicine in New York, New York. Qualified in 2014, 12 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 28-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New York.

Years since qualifying
12
Licensed in
MA, NY
In the registry since
2006
Specialties on file
2
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

1 Gustave L Levy Pl # 1149 Mount Sinai Medical Ctr Dept OF Emergency Medicine
New York, NY 10029-6504
Phone: (212) 241-6639
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 229567 (NY)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 227651 (MA)

Record details

NPI number1063438521
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 15, 2006
Last updated in NPPESAugust 24, 2020
Certification dateAugust 24, 2020

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 28 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients125
Services billed 234 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Colleagues at Icahn School of Medicine at Mount Sinai

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 28 clinicians in the practice; 12 are shown here.

Other providers in New York