Quick answers
- Which hospitals does Gregory Ackroyd work at?
- Medicare's official clinician data lists Gregory Ackroyd at 1 hospital: Providence Santa Rosa Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Ackroyd see patients?
- Medicare's clinician data lists 4 practice locations, including Santa Rosa, CA, Petaluma, CA and Anaheim, CA. Call before your visit to confirm the address.
- What is Gregory Ackroyd's specialty?
- Medicare lists Neurology as the primary specialty, and also Sleep Medicine.
- Does Gregory Ackroyd accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Ackroyd 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 Gregory Ackroyd offer telehealth?
- Medicare's clinician data says Gregory Ackroyd offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory Ackroyd?
- (707) 546-3210, as listed in official Medicare / NPI Registry data.
- What is Gregory Ackroyd's NPI number?
- 1538192984. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Ackroyd works
Medicare's Facility Affiliation Data lists Gregory Ackroyd at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA · Acute Care Hospital · CCN 050174
Practice locations
Addresses where Gregory Ackroyd is enrolled with Medicare (CMS data updated 2026-10-02).
- 1165 Montgomery DrSanta Rosa, CA 95405 (707) 546‑3210
- 1476 Professional Dr, Suite 504Petaluma, CA 94954 (707) 781‑7350
- 200 W Ctr St PromenadeAnaheim, CA 92805
- 500 Doyle Park DrSanta Rosa, CA 95405
Group practices
Medicare enrollment lists Gregory Ackroyd as a member of this group (CMS data updated 2026-10-02).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Neurologyprimary
- Sleep Medicinealso
Other neurologists in Santa Rosa
Clinicians with the same Medicare primary specialty in Santa Rosa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1538192984 |
| 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