Quick answers
- Which hospitals does Mary Massieu work at?
- Medicare's official clinician data lists Mary Massieu at 1 hospital: Yavapai Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary Massieu see patients?
- Medicare's clinician data lists 1 practice location in Chino Valley, AZ. Call before your visit to confirm the address.
- What is Mary Massieu's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mary Massieu accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Massieu 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.
- Does Mary Massieu offer telehealth?
- Medicare's clinician data says Mary Massieu offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary Massieu?
- (928) 667-1968, as listed in official Medicare / NPI Registry data.
- What is Mary Massieu's NPI number?
- 1144644287. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary Massieu works
Medicare's Facility Affiliation Data lists Mary Massieu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Yavapai Regional Medical CenterPrescott, AZ · Acute Care Hospital · CCN 030012
Practice locations
Addresses where Mary Massieu is enrolled with Medicare (CMS data updated 2026-10-02).
- 1934 N Hwy 89Chino Valley, AZ 86323 (928) 667‑1968
Group practices
Medicare enrollment lists Mary Massieu as a member of this group (CMS data updated 2026-10-02).
- Carelock LLC13 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Chino Valley
Clinicians with the same Medicare primary specialty in Chino Valley, AZ — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1144644287 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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