Katherine Masterton, APRN, CNP
NPI 1891433785 · Nurse Practitioner · Warrenville, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Masterton, APRN, CNP is a Nurse Practitioner provider in Warrenville, IL (NPI 1891433785).
Provider details
- NPI number
- 1891433785
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 209024984 (IL)
Specialties & taxonomies
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 tenure25% of score
4 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
599 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 242 | $112 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 132 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 104 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 76 | $10 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 28 | $158 |
| Ferritin (blood Protein) Level82728 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 71 | 21 |
| Rivaroxabanbrand: Xarelto | 70 | 24 |
| Anastrozole | 69 | 28 |
| Lenalidomidebrand: Revlimid | 64 | 14 |
| Dexamethasone | 60 | 24 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 42 | 16 |
| Enzalutamidebrand: Xtandi |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$371 across 13 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
- 2022-05-22
- Last updated
- 2025-02-05
- Certified
- 2025-02-05
Frequently asked questions
- What is Katherine Masterton's NPI number?
- Katherine Masterton's National Provider Identifier (NPI) is 1891433785, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Masterton's specialty?
- Katherine Masterton is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katherine Masterton located?
- Katherine Masterton's practice location on file with NPPES is 4405 Weaver Pkwy, Warrenville, IL 60555-3269.
- What is Katherine Masterton's phone number?
- The practice phone number listed in the NPPES registry for Katherine Masterton is (630) 352-5450.
- Does Katherine Masterton accept Medicare?
- Katherine Masterton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Masterton's NPI active?
- Yes — Katherine Masterton's NPI (1891433785) is active in the NPPES registry as of the last update on 2025-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.