Catherine Siman
NPI 1558129031 · Physician Assistant · Fort Collins, CO
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Siman is a Physician Assistant provider in Fort Collins, CO (NPI 1558129031).
Provider details
- NPI number
- 1558129031
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-03-11
- Last updated
- 2025-02-26
- Certified
- 2025-02-26
Frequently asked questions
- What is Catherine Siman's NPI number?
- Catherine Siman's National Provider Identifier (NPI) is 1558129031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Siman's specialty?
- Catherine Siman is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Catherine Siman located?
- Catherine Siman's practice location on file with NPPES is 1001 E Harmony Rd # A103, Fort Collins, CO 80525-8891.
- What is Catherine Siman's phone number?
- The practice phone number listed in the NPPES registry for Catherine Siman is (970) 237-2239.
- Does Catherine Siman accept Medicare?
- Catherine Siman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Siman's NPI active?
- Yes — Catherine Siman's NPI (1558129031) is active in the NPPES registry as of the last update on 2025-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.