Katie Iadonisi, MSN, A-GNP-C, OCN
NPI 1639808603 · Adult Health Nurse Practitioner · South Weymouth, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katie Iadonisi, MSN, A-GNP-C, OCN is a Adult Health Nurse Practitioner provider in South Weymouth, MA (NPI 1639808603).
Provider details
- NPI number
- 1639808603
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, A-GNP-C, OCN
- Sex
- Female
- Sole proprietor
- No
- License
- 5016311 (NC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 51 | 24 |
| Tamoxifen Citrate | 35 | 17 |
| Anastrozole | 33 | 20 |
| Ondansetronbrand: Ondansetron Odt | 25 | 11 |
| Exemestane | 24 | 12 |
| Omeprazole | 24 | 12 |
| Oxycodone Hcl | 22 | 15 |
| Apixaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$113 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-06-06
- Last updated
- 2023-02-02
- Certified
- 2023-02-02
Frequently asked questions
- What is Katie Iadonisi's NPI number?
- Katie Iadonisi's National Provider Identifier (NPI) is 1639808603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katie Iadonisi's specialty?
- Katie Iadonisi is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katie Iadonisi located?
- Katie Iadonisi's practice location on file with NPPES is 101 Columbian St, South Weymouth, MA 02190-1601.
- What is Katie Iadonisi's phone number?
- The practice phone number listed in the NPPES registry for Katie Iadonisi is (781) 624-4800.
- Does Katie Iadonisi accept Medicare?
- Katie Iadonisi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katie Iadonisi's NPI active?
- Yes — Katie Iadonisi's NPI (1639808603) is active in the NPPES registry as of the last update on 2023-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.