Quick answers
- Where does Helen E. Callahan see patients?
- Medicare's clinician data lists 1 practice location in Tucson, AZ. Call before your visit to confirm the address.
- What is Helen E. Callahan's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Helen E. Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Helen E. Callahan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Helen E. Callahan?
- (520) 396-1360, as listed in official Medicare / NPI Registry data.
- What is Helen E. Callahan's NPI number?
- 1215937883. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Helen E. Callahan is enrolled with Medicare (CMS data updated 2026-10-02).
- 4892 N Stone Ave, Suite 100Tucson, AZ 85704 (520) 396‑1360
Group practices
Medicare enrollment lists Helen E. Callahan as a member of this group (CMS data updated 2026-10-02).
- Tucson Physician Group Holdings LLC201 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Tucson
Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215937883 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians