Quick answers
- Does Jeffrey A. Vander Kooi accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey A. Vander Kooi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Jeffrey A. Vander Kooi see?
- In 2024, CMS data shows 140 Original Medicare patients and 1,615 services for Jeffrey A. Vander Kooi. This counts Original Medicare only and measures volume, not quality.
- What is Jeffrey A. Vander Kooi's NPI number?
- 1407881675. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Jeffrey A. Vander Kooi, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 140 |
|---|---|
| Services billed to Medicare | 1,615 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 67 |
Most frequent services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)792 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)789 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Depression75%
- High cholesterol67%
- High blood pressure56%
- Anxiety54%
- Arthritis50%
- Osteoporosis20%
Practice locations
Addresses where Jeffrey A. Vander Kooi is enrolled with Medicare (CMS data updated October 2, 2026).
- 16100 Chesterfield Pkwy W, Suite 260Chesterfield, MO 63017 (636) 778‑9415
Specialties
- Psychiatryprimary
- Addiction Medicinealso
Other psychiatrists in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407881675 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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