Quick answers
- Which hospitals does Mark L. Vandewalker work at?
- Medicare's official clinician data lists Mark L. Vandewalker at 1 hospital: Boone Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Vandewalker see patients?
- Medicare's clinician data lists 2 practice locations, including Jefferson City, MO and Columbia, MO. Call before your visit to confirm the address.
- What is Mark L. Vandewalker's specialty?
- Medicare lists Allergy/Immunology as the primary specialty.
- Does Mark L. Vandewalker accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Vandewalker 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 Mark L. Vandewalker?
- (573) 634-7000, as listed in official Medicare / NPI Registry data.
- What is Mark L. Vandewalker's NPI number?
- 1386833358. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark L. Vandewalker works
Medicare's Facility Affiliation Data lists Mark L. Vandewalker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Boone Hospital CenterColumbia, MO · Acute Care Hospital · CCN 260068
Practice locations
Addresses where Mark L. Vandewalker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1233 Jefferson StJefferson City, MO 65109 (573) 634‑7000
- 601 W Nifong Blvd, Suite 2bColumbia, MO 65203 (573) 446‑7000
Group practices
Medicare enrollment lists Mark L. Vandewalker as a member of this group (CMS data updated 2026-10-02).
- PSF PLLC98 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1974 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386833358 |
| 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