Quick answers
- Where does John T. Heroldt see patients?
- Medicare's clinician data lists 2 practice locations, including Merrillville, IN and Laporte, IN. Call before your visit to confirm the address.
- What is John T. Heroldt's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does John T. Heroldt accept Medicare assignment?
- Yes. Medicare's clinician data says John T. Heroldt 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 T. Heroldt?
- (219) 756-8944, as listed in official Medicare / NPI Registry data.
- What is John T. Heroldt's NPI number?
- 1699794644. 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 T. Heroldt is enrolled with Medicare (CMS data updated 2026-10-02).
- 119 N 86th AveMerrillville, IN 46410 (219) 756‑8944
- 717 Michigan AveLaporte, IN 46350 (219) 324‑0488
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Merrillville
Clinicians with the same Medicare primary specialty in Merrillville, IN — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699794644 |
| 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