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

Louisa Holaday

Individual provider Internal Medicine Physician · NPI 1407238256

Louisa Holaday practises Internal Medicine in New York, New York. Graduated from University of Michigan Medical School in 2015, 11 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 2,791-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
11
Trained at
University of Michigan Medical School
Licensed in
NY
In the registry since
2015
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Practice location Address checks out

1 Gustave L Levy Pl
New York, NY 10029-6504
Phone: (212) 241-4141
Fax: (212) 426-5018
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 111 E 210th St, Bronx, NY 10467-2401 — (718) 920-4321

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 294930 (NY)

Record details

NPI number1407238256
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedJune 28, 2015
Last updated in NPPESJune 7, 2021
Certification dateJune 7, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 2015 (11 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 patients38
Services billed 52 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.

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