Iwona Dziewa, D.O.
Allergy & Immunology Physician · Jefferson Valley, NY
Iwona Dziewa, D.O. is an allergy & immunology physician with a practice address in Jefferson Valley, New York, and NPI 1083091789, issued on May 1, 2015. Check the license (New York 309855, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Iwona Dziewa
- Credential
- D.O.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- 309855 NY
OS021208 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3680 Hill Blvd, Jefferson Valley, NY 10535
- Phone
- (914) 245-7700
- Enumerated
- May 1, 2015
- Record last updated
- Jun 28, 2023
- Fax
- (914) 248-2081
- Medicare enrollment
- Enrolled (PECOS I20221220001755); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 3680 Hill Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sharona Daube, PA-CPhysician Assistant1215494349
- William Fitzgibbon, AU.D.Audiologist1942361647
- Young Ho Han, MDInternal Medicine Physician1831329127
- Alisha Liggett, MDFamily Medicine Physician1134402043
- Wendy Manowitz, M.D.Pediatrics Physician1538238845
- Robert Parks, M.D.Otolaryngology Physician1801891916
Verify Iwona Dziewa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 309855Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
475 Medicare Part D claims for 122 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Azelastine Hcl53 claims
- Fluticasone Propionate43 claims
- Montelukast Sodium38 claims
- Albuterol Sulfate Hfa37 claims
- Ipratropium Bromide24 claims
- Epinephrine22 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.
Bills Medicare through one group practice
- Optum Medical Care PCJefferson Valley, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology Physician providers in New York
There are 311 allergy & immunology physician records in New York.
Other allergy & immunology physician records in New York
- Manar Abdalgani, MBBSNew York, NY1154671873
- Babatunde Adeyemi, M.D.Brooklyn, NY1447205836
- Thomas Adler, M.D.Rochester, NY1154361442
- Shradha Agarwal, MDNew York, NY1740320126
- Mohammad Akhtaruzzaman, MDCanton, NY1891840625
- Sharzad Alagheband, M.DWilliston Park, NY1518371830
- Robert Alessi, MDRome, NY1518959568
- Ama Alexis, M.D.New York, NY1700978681
- Daryl Altman, MDHicksville, NY1538167648
- Thessaloniki Angelakos, MDScarsdale, NY1114094083
Common questions
What is Iwona Dziewa, D.O.'s NPI number?
Iwona Dziewa, D.O.'s National Provider Identifier (NPI) is 1083091789, issued on May 1, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Iwona Dziewa, D.O. located?
The NPPES record lists a practice address at 3680 Hill Blvd, Jefferson Valley, NY, 10535. Phone: (914) 245-7700. Providers update this record themselves, so call before visiting.
How can I verify Iwona Dziewa, D.O.'s license?
NPPES lists New York license number 309855, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Iwona Dziewa, D.O. prescribe under Medicare Part D?
In 2024, Iwona Dziewa, D.O. had 475 Medicare Part D claims for 122 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
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.