Quick answers
- Which hospitals does Grant Hoekzema work at?
- Medicare's official clinician data lists Grant Hoekzema at 4 hospitals: Mercy Hospital Jefferson, Mercy Hospital South, Mercy Hospital St Louis and Mercy Hospital Washington. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Grant Hoekzema see patients?
- Medicare's clinician data lists 2 practice locations, including Saint Louis, MO. Call before your visit to confirm the address.
- What is Grant Hoekzema's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Grant Hoekzema accept Medicare assignment?
- Yes. Medicare's clinician data says Grant Hoekzema 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 Grant Hoekzema offer telehealth?
- Medicare's clinician data says Grant Hoekzema offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Grant Hoekzema?
- (314) 251-6050, as listed in official Medicare / NPI Registry data.
- What is Grant Hoekzema's NPI number?
- 1609842350. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Grant Hoekzema works
Medicare's Facility Affiliation Data lists Grant Hoekzema at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · CCN 260023
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · CCN 260052
Practice locations
Addresses where Grant Hoekzema is enrolled with Medicare (CMS data updated 2026-10-02).
- 12680 Olive Blvd, Suite 300Saint Louis, MO 63141 (314) 251‑6050
- 7212 Balson AveSaint Louis, MO 63130
Group practices
Medicare enrollment lists Grant Hoekzema as a member of these groups (CMS data updated 2026-10-02).
- Mercy Clinic East Communities571 clinicians in the group
- Aging Well Health Care, LLC238 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1609842350 |
| 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