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

Individual provider Allergy & Immunology Physician · NPI 1205894607

Florence Ida Hsu, MD practises Allergy/Immunology in North Haven, Connecticut. Graduated from Columbia University College of Physicians and Surgeons in 2000, 26 years ago. Practices with Yale University, a 2,618-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Connecticut and Massachusetts.

Years since qualifying
26
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
CT, MA
In the registry since
2006
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

6 Devine St Ste 2B
North Haven, CT 06473-2222
Phone: (203) 287-6200
Fax: (203) 287-6101
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 55 Lock St, New Haven, CT 06511-3603 — (203) 432-8797

Specialties & licences

Allergy & Immunology (Internal Medicine) Physician (primary) Taxonomy 207RA0201X · Licence 49738 (CT)
Allergy & Immunology Physician Taxonomy 207K00000X · Licence 49738 (CT)
Allergy & Immunology Physician Taxonomy 207K00000X · Licence 217989 (MA)
Allergy & Immunology (Internal Medicine) Physician Taxonomy 207RA0201X · Licence 217989 (MA)

Record details

NPI number1205894607
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 3, 2006
Last updated in NPPESJune 15, 2020
Certification dateJune 15, 2020

Medicare enrollment

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

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2000 (26 years in practice)
Group practice Yale University — 2618 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 patients36
Services billed 114 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $14,419 10 payments
Consulting Fee $4,447 2 payments

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.

Colleagues at Yale University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2618 clinicians in the practice; 12 are shown here.

Other providers in North Haven