Cassandra Ann Callahan, CNP
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2025
- Practice address
- 353 Fairmont Blvd, Rapid City, SD 57701
- Practice phone
- Call (605) 755-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Cassandra Callahan's professional email, personal email and mobile number
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Cassandra Ann Callahan is a family nurse practitioner in Rapid City, South Dakota
Cassandra Callahan practices at Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health.
Cassandra Callahan's NPI, 1235091299, was assigned on November 28, 2025. Cassandra Callahan holds South Dakota license CP003940.
- NPI
- 1235091299NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901386481
- NPI enumeration date
- November 28, 2025
- NPI status
- Active
- Practice phone
- (605) 755-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 28
- Medical school graduation
- 2024
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassandra Ann Callahan practices at Monument Health Rapid City Hospital in Rapid City, South Dakota
Cassandra Callahan's primary practice is Monument Health Rapid City Hospital, at 353 Fairmont Blvd, Rapid City, SD 57701 in Pennington County. The practice phone is (605) 755-1000.
- Monument Health Rapid City Hospital353 Fairmont Blvd, Rapid City, SD 57701 · Pennington CountyPhone(605) 755-1000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassandra Ann Callahan is affiliated with 1 site of care and 1 medical group
Cassandra Callahan's primary practice is Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health. The medical group on file is Monument Health Rapid City Hospital.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Cassandra Ann Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cassandra Callahan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Monument Health Rapid City Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Monument Health and 6.2K+ hospitals, with verified contacts in the same login.
Cassandra Ann Callahan is one of 745 family nurse practitioners in South Dakota
Family is Cassandra Callahan's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Cassandra Callahan is licensed in South Dakota.
Specialties and state licenses
- Family nurse practitioner, South DakotaPrimary
Family nurse practitioners near Cassandra Callahan
Counts of family nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Cassandra Ann Callahan's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Cassandra Callahan's median patient age at 76, with 0% women.
Cassandra Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Sources for Cassandra Ann Callahan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Cassandra Ann Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Cassandra Ann Callahan's NPI number?
Cassandra Ann Callahan's NPI number is 1235091299. It was assigned on November 28, 2025, and it is active in the NPI Registry.
What does Cassandra Ann Callahan specialize in?
Cassandra Ann Callahan is a family nurse practitioner in Rapid City, South Dakota. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Cassandra Ann Callahan practice?
Cassandra Callahan practices at 353 Fairmont Blvd, Rapid City, SD 57701. Cassandra Callahan's primary practice is Monument Health Rapid City Hospital in Rapid City, South Dakota, part of Monument Health.
What is Cassandra Ann Callahan's office phone number?
The practice phone on file for Cassandra Callahan is (605) 755-1000.
What is Cassandra Ann Callahan's medical license number?
Cassandra Callahan holds South Dakota license CP003940.
Which hospitals is Cassandra Ann Callahan affiliated with?
Cassandra Callahan practices at Monument Health Rapid City Hospital in Rapid City, South Dakota.
What medical group is Cassandra Ann Callahan part of?
Cassandra Callahan is linked to Monument Health Rapid City Hospital.
How long has Cassandra Ann Callahan been practicing?
Cassandra Callahan graduated from medical school in 2024, 2 years ago.
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