Quick answers
- Which hospitals does Melissa Gregorius work at?
- Medicare's official clinician data lists Melissa Gregorius at 1 hospital: Cabinet Peaks Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Melissa Gregorius see patients?
- Medicare's clinician data lists 4 practice locations, including Pinole, CA, Libby, MT and Santa Cruz, CA. Call before your visit to confirm the address.
- What is Melissa Gregorius's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Melissa Gregorius accept Medicare assignment?
- Yes. Medicare's clinician data says Melissa Gregorius 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 Melissa Gregorius?
- (510) 724-9500, as listed in official Medicare / NPI Registry data.
- What is Melissa Gregorius's NPI number?
- 1942440359. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Melissa Gregorius works
Medicare's Facility Affiliation Data lists Melissa Gregorius at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cabinet Peaks Medical CenterLibby, MT · Critical Access Hospital · CCN 271320
Practice locations
Addresses where Melissa Gregorius is enrolled with Medicare (CMS data updated 2026-10-02).
- 1700 San Pablo Ave, Suite DPinole, CA 94564 (510) 724‑9500
- 209 Health Park DrLibby, MT 59923 (406) 283‑7000
- 3003 Paul Sweet RdSanta Cruz, CA 95065 (408) 354‑9254
- 429 Llywelyn BlvdCampbell, CA 95008 (408) 364‑1616
Group practices
Medicare enrollment lists Melissa Gregorius as a member of these groups (CMS data updated 2026-10-02).
- Mai Nursing Anesthesia PC35 clinicians in the group
- St Johns Lutheran Hospital Inc34 clinicians in the group
- Anesthesia Care Consultants Inc18 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), California →
Other nurse anesthetists in Pinole
Clinicians with the same Medicare primary specialty in Pinole, CA — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942440359 |
| 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