Quick answers
- Where does John Mazarella see patients?
- Medicare's clinician data lists 1 practice location in Oregon City, OR. Call before your visit to confirm the address.
- What is John Mazarella's specialty?
- Medicare lists Mental Health Counselor as the primary specialty.
- Does John Mazarella accept Medicare assignment?
- Yes. Medicare's clinician data says John Mazarella 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 John Mazarella?
- (503) 655-8471, as listed in official Medicare / NPI Registry data.
- What is John Mazarella's NPI number?
- 1861801797. 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 John Mazarella is enrolled with Medicare (CMS data updated 2026-10-02).
- 110 Beavercreek RdOregon City, OR 97045 (503) 655‑8471
Group practices
Medicare enrollment lists John Mazarella as a member of this group (CMS data updated 2026-10-02).
- County of Clackamas Office of County Auditor78 clinicians in the group
Specialties
- Mental Health Counselorprimary
Other mental health counselors in Oregon City
Clinicians with the same Medicare primary specialty in Oregon City, OR — not a recommendation.
Clinician information
| Graduation year | 2017 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861801797 |
| 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