Katherine Chojnicki, FNP
NPI 1831697713 · Family Nurse Practitioner · Williamsville, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Chojnicki, FNP is a Family Nurse Practitioner provider in Williamsville, NY (NPI 1831697713).
Provider details
- NPI number
- 1831697713
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- F342280-1 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
328 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 93 | $7 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $73 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 47 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 45 | $10 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $104 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 206 | 63 |
| Hydroxyurea | 109 | 26 |
| Rivaroxabanbrand: Xarelto | 101 | 31 |
| Ruxolitinib Phosphatebrand: Jakafi | 61 | — |
| Ibrutinibbrand: Imbruvica | 57 | — |
| Lenalidomide | 51 | — |
| Letrozole | 47 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$504 across 23 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
- 2018-01-25
- Last updated
- 2023-01-24
- Certified
- 2023-01-24
Frequently asked questions
- What is Katherine Chojnicki's NPI number?
- Katherine Chojnicki's National Provider Identifier (NPI) is 1831697713, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Chojnicki's specialty?
- Katherine Chojnicki is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katherine Chojnicki located?
- Katherine Chojnicki's practice location on file with NPPES is 199 Park Club Ln Ste 200, Williamsville, NY 14221-5269.
- What is Katherine Chojnicki's phone number?
- The practice phone number listed in the NPPES registry for Katherine Chojnicki is (716) 634-3340.
- Does Katherine Chojnicki accept Medicare?
- Katherine Chojnicki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Chojnicki's NPI active?
- Yes — Katherine Chojnicki's NPI (1831697713) is active in the NPPES registry as of the last update on 2023-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.