Quick answers
- Where does Harold C. Mason see patients?
- Medicare's clinician data lists 4 practice locations, including Hammond, IN. Call before your visit to confirm the address.
- What is Harold C. Mason's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Harold C. Mason accept Medicare assignment?
- Yes. Medicare's clinician data says Harold C. Mason 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 Harold C. Mason?
- (219) 937-5808, as listed in official Medicare / NPI Registry data.
- What is Harold C. Mason's NPI number?
- 1265692057. 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 Harold C. Mason is enrolled with Medicare (CMS data updated 2026-10-02).
- 4016 Hohman AveHammond, IN 46327 (219) 937‑5808
- 4022 Hohman AveHammond, IN 46327 (219) 937‑3300
- 527 State StHammond, IN 46320 (219) 937‑3300
- 559 State StHammond, IN 46320 (219) 937‑3300
Group practices
Medicare enrollment lists Harold C. Mason as a member of this group (CMS data updated 2026-10-02).
- Southlake Community Mental Health Center Inc39 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Hammond
Clinicians with the same Medicare primary specialty in Hammond, IN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265692057 |
| 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