Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark E Devries, PHD

Individual provider Clinical Neuropsychologist · NPI 1265476220

Mark E Devries, PHD is a Clinical Psychologist in Grand Rapids, Michigan. Qualified in 1992, 34 years ago. Practices with Pine Rest Christian Mental Health Services, a 353-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
34
Licensed in
MI
In the registry since
2006
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

300 68th St SE
Grand Rapids, MI 49548-6927
Phone: (616) 455-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 30 Jefferson Ave Se, Grand Rapids, MI 49503-4304 — (616) 303-1313

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 6301008596 (MI)
Psychologist Taxonomy 103T00000X · Licence 6301008596 (MI)

Record details

NPI number1265476220
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJune 16, 2006
Last updated in NPPESFebruary 23, 2026
Certification dateFebruary 23, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1992 (34 years in practice)
Group practice Pine Rest Christian Mental Health Services — 353 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients24
Services billed 161 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Pine Rest Christian Mental Health Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 353 clinicians in the practice; 12 are shown here.

Other providers in Grand Rapids