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

Dr. Sara Ilana Fontanez, MD

Individual provider Hospitalist Physician · NPI 1184004889

Dr. Sara Ilana Fontanez, MD is registered under Family Practice in Brooklyn, New York. Graduated from Loyola University of Chicago, Stritch School of Medicine in 2015, 11 years ago. Practices with Mass General Brigham Community Physicians Inc, a 422-clinician group, works from 4 locations, accepts Medicare assignment and offers telehealth. Licensed in New York and Wisconsin.

Years since qualifying
11
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
NY, WI
In the registry since
2015
Specialties on file
3
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

1114 Liberty Ave
Brooklyn, NY 11208-2922
Phone: (718) 765-6058
Fax: (347) 808-4895
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 111 E 210th St, Bronx, NY 10467-2401 — (718) 920-7441
  • 101 Nicolls Rd, Stony Brook, NY 11794-2401 — (314) 448-4786
  • 800 West Ave S, La Crosse, WI 54601-8806 — (608) 785-0940

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 295358 (NY)
Hospitalist Physician Taxonomy 208M00000X · Licence 295358 (NY)
Family Medicine Physician Taxonomy 207Q00000X · Licence 87338 (WI)

Record details

NPI number1184004889
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 8, 2015
Last updated in NPPESApril 22, 2026
Certification dateApril 22, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Mass General Brigham Community Physicians Inc — 422 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 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 patients35
Services billed 98 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 Mass General Brigham Community Physicians Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 422 clinicians in the practice; 12 are shown here.

Other providers in Brooklyn