Cassandra Callahan, CNP
NPI 1235091299 · Family Nurse Practitioner · Rapid City, SD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cassandra Callahan, CNP is a Family Nurse Practitioner provider in Rapid City, SD (NPI 1235091299).
Provider details
- NPI number
- 1235091299
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNP
- Sex
- Female
- Sole proprietor
- No
- License
- CP003940 (SD)
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 tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% 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
- 2025-11-28
- Last updated
- 2025-11-28
- Certified
- 2025-11-28
Frequently asked questions
- What is Cassandra Callahan's NPI number?
- Cassandra Callahan's National Provider Identifier (NPI) is 1235091299, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cassandra Callahan's specialty?
- Cassandra Callahan is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Cassandra Callahan located?
- Cassandra Callahan's practice location on file with NPPES is 353 Fairmont Blvd, Rapid City, SD 57701-7375.
- What is Cassandra Callahan's phone number?
- The practice phone number listed in the NPPES registry for Cassandra Callahan is (605) 755-1000.
- Does Cassandra Callahan accept Medicare?
- Cassandra Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cassandra Callahan's NPI active?
- Yes — Cassandra Callahan's NPI (1235091299) is active in the NPPES registry as of the last update on 2025-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.