Iwona Dziewa, D.O.
NPI 1083091789 · Allergy & Immunology Physician · Jefferson Valley, NY
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Iwona Dziewa, D.O. is a Allergy & Immunology Physician provider in Jefferson Valley, NY (NPI 1083091789).
Provider details
- NPI number
- 1083091789
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- OS021208 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,433 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 443 | $4 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 380 | $17 |
| Professional Service for Multiple Injections of Allergen95117 | 250 | $15 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 114 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 73 | $141 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 48 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 53 | 18 |
| Fluticasone Propionate | 43 | 23 |
| Montelukast Sodium | 38 | 13 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 37 | 24 |
| Ipratropium Bromide | 24 | — |
| Epinephrine | 22 | 18 |
| Benralizumabbrand: Fasenra Pen | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-05-01
- Last updated
- 2023-06-28
- Certified
- 2023-06-28
Frequently asked questions
- What is Iwona Dziewa's NPI number?
- Iwona Dziewa's National Provider Identifier (NPI) is 1083091789, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Iwona Dziewa's specialty?
- Iwona Dziewa is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Iwona Dziewa located?
- Iwona Dziewa's practice location on file with NPPES is 3680 Hill Blvd, Jefferson Valley, NY 10535-1500.
- What is Iwona Dziewa's phone number?
- The practice phone number listed in the NPPES registry for Iwona Dziewa is (914) 245-7700.
- Does Iwona Dziewa accept Medicare?
- Iwona Dziewa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Iwona Dziewa's NPI active?
- Yes — Iwona Dziewa's NPI (1083091789) is active in the NPPES registry as of the last update on 2023-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.