Florence Ida Hsu, M.D.
Allergy & Immunology (Internal Medicine) Physician · North Haven, CT
Florence Ida Hsu, M.D. is an allergy & immunology (internal medicine) physician with a practice address in North Haven, Connecticut, and NPI 1205894607, issued on May 3, 2006. Check the license (Connecticut 49738, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Florence Ida Hsu
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License numbers
- 49738 CT
217989 MA
Self-reported in NPPES; status is on the state search - Practice location
- 6 Devine St Ste 2B, North Haven, CT 06473
- Phone
- (203) 287-6200
- Enumerated
- May 3, 2006
- Record last updated
- Jun 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (203) 287-6101
- Medicaid ID
- 2119242 MA
- Medicare enrollment
- Enrolled (PECOS I20110603000347); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
7 nearest allergy & immunology (internal medicine) physician records → All 8 in Connecticut → Look up another NPI →
Also registered at 6 Devine St Ste 2B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Pitt, MDNeurology Physician1790703221
- Mario Rodenas, MDAllergy & Immunology Physician1871709063
Verify Florence Ida Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 49738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024
234 Medicare Part D claims for 25 beneficiaries, against an average of 789 among the 429 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims. 62 claims were for opioids.
Most prescribed
- Oxycodone Hcl61 claims
- Berinert48 claims
- Haegarda22 claims
- Hydroxyzine Hcl16 claims
- Privigen15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $12,514.99
12 payments; by number, the most common kind was compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program; the largest payer was Csl Behring. The 321 providers of this specialty with any payment received $7,456.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology (Internal Medicine) Physician providers in Connecticut
There are 8 allergy & immunology (internal medicine) physician records in Connecticut.
All 8 in Connecticut → Every provider in North Haven → Allergy & Immunology (Internal Medicine) Physician nationwide →
The 7 allergy & immunology (internal medicine) physician records with the nearest ZIP codes
- Paula Whittington, M.D., PH.D.New Haven, CT 065101922327295
- Bernard Adelsberg, MDHamden, CT 065181417956962
- Richard Mangi, MDHamden, CT 065181619976917
- Robert Debernardo, M.D., MPHTrumbull, CT 066111447676127
- George Sprecace, M.D. J.D.New London, CT 063201891792529
- David Zolov, MDDanbury, CT 068101427080126
- Margaret Sweeney, M.D.Norwalk, CT 068511235211863
Common questions
What is Florence Ida Hsu, M.D.'s NPI number?
Florence Ida Hsu, M.D.'s National Provider Identifier (NPI) is 1205894607, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Florence Ida Hsu, M.D. located?
The NPPES record lists a practice address at 6 Devine St Ste 2B, North Haven, CT, 06473. Phone: (203) 287-6200. Providers update this record themselves, so call before visiting.
How can I verify Florence Ida Hsu, M.D.'s license?
NPPES lists Connecticut license number 49738, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Florence Ida Hsu, M.D. prescribe under Medicare Part D?
In 2024, Florence Ida Hsu, M.D. had 234 Medicare Part D claims for 25 beneficiaries; the average among allergy & immunology (internal medicine) physician prescribers was 789. Part D covers Medicare prescriptions only.
What is Florence Ida Hsu, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.