FLORENCE IDA HSU M.D.
NPI 1205894607
Internal Medicine - Allergy & Immunology in North Haven, CT
About Florence Ida Hsu M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FLORENCE IDA HSU M.D. (NPI 1205894607) is an individual allergy & immunology provider in North Haven, Connecticut, licensed in Connecticut (49738) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in New Haven, and is a graduate of Columbia University College Of Physicians And Surgeons (2000).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Florence Ida Hsu M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Florence Hsu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hamden, CT 06514
- Reassigned Medicare billing, Connecticut enrollment
- Also billed through NPI 1093862740 (Connecticut)
- 3,728 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06473 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 6
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Florence Hsu's NPI number?
The NPI number for Florence Hsu is 1205894607. It was assigned to this individual provider in the NPPES registry on May 3, 2006.
Where is Florence Hsu located?
Florence Hsu practices at 6 Devine St Ste 2B, North Haven, CT 06473. The listed phone number is (203) 287-6200.
What is Florence Hsu's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.
Is Florence Hsu enrolled in Medicare?
Yes. Florence Hsu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Florence Hsu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Florence Hsu reassigns Medicare benefits to Yale University (Hamden, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Florence Hsu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Florence Hsu accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Florence Hsu as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Florence Hsu was last updated on June 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Florence Ida Hsu, M.D. · NPI 1205894607
Allergy & Immunology physician in North Haven, Connecticut. Individual provider, active in the CMS NPPES registry since May 3, 2006.
## Identity
- **NPI:** 1205894607 (Entity type: Individual)
- **Enumerated:** May 3, 2006
- **Primary specialty:** Internal Medicine - Allergy & Immunology · taxonomy 207RA0201X
- **State license:** 49738 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 6 DEVINE ST STE 2B, North Haven, CT 06473-2222
- **Phone:** (203) 287-6200 · **Fax:** (203) 287-6101
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Yale University (NPI 1134391824, Hamden, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2000
## Record status
- **NPPES last updated:** June 15, 2020
- **Other identifiers:** Medicaid 2119242 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1205894607) · Data from the CMS NPPES public registry.