Catherine Willenborg, PAC
NPI 1154389153 · Physician Assistant · Scottsdale, AZ
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Willenborg, PAC is a Physician Assistant provider in Scottsdale, AZ (NPI 1154389153).
Provider details
- NPI number
- 1154389153
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- PA972 (NV)
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 tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$32 across 1 record (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
Additional practice locations (2)
- 2898 Broadway StSan Francisco, CA 94115-1061Phone: (775) 771-1824
- 8 Woodland RdSt Helena, CA 94574Phone: (775) 771-1824
Registry dates
- Enumerated
- 2006-05-02
- Last updated
- 2025-08-06
- Certified
- 2025-08-06
Frequently asked questions
- What is Catherine Willenborg's NPI number?
- Catherine Willenborg's National Provider Identifier (NPI) is 1154389153, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Willenborg's specialty?
- Catherine Willenborg is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Catherine Willenborg located?
- Catherine Willenborg's practice location on file with NPPES is 13400 E Shea Blvd, Scottsdale, AZ 85259-5499.
- What is Catherine Willenborg's phone number?
- The practice phone number listed in the NPPES registry for Catherine Willenborg is (480) 301-8000.
- Does Catherine Willenborg accept Medicare?
- Catherine Willenborg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Willenborg's NPI active?
- Yes — Catherine Willenborg's NPI (1154389153) is active in the NPPES registry as of the last update on 2025-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.