Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. GREGORY MARKWAY PHD
NPI 1255373148
Psychologist in Jefferson City, MO

Active since June 12, 2006PECOS Enrolled
3702 W TRUMAN BLVD, SUITE 115, JEFFERSON CITY, MO 65109(573) 634-5303(573) 761-6888 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Gregory Markway Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY MARKWAY PHD (NPI 1255373148) is an individual psychologist in Jefferson City, Missouri, licensed in Missouri (01456) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1255373148
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. GREGORY MARKWAYCredential: PHD
Location Address3702 W TRUMAN BLVD, SUITE 115Jefferson City, MO 65109-4970
Mailing Address123 Boonville RdJefferson City, MO 65109-0903 · (573) 636-3066 · Fax (573) 761-6888
Fax(573) 761-6888
Sole ProprietorNo
Enumeration DateJune 12, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1255373148 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in MO · 01456
Definition

A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.

3702 W TRUMAN BLVD, Jefferson City, MO 65109

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Dr. Gregory Markway Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
49 services12 patients

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Surgery
3702 W TRUMAN BLVD, SUITE 104
JEFFERSON CITY, MO 65109
Clinic/Center (Prison Health)
3702 W TRUMAN BLVD, SUITE 104
JEFFERSON CITY, MO 65109
Psychologist
3702 W TRUMAN BLVD, SUITE 115
JEFFERSON CITY, MO 65109
Psychologist
3702 W TRUMAN BLVD, SUITE 115
JEFFERSON CITY, MO 65109

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Markway's NPI number?

The NPI number for Gregory Markway is 1255373148. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is Gregory Markway located?

Gregory Markway practices at 3702 W Truman Blvd Suite 115, Jefferson City, MO 65109. The listed phone number is (573) 634-5303.

What is Gregory Markway's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Gregory Markway enrolled in Medicare?

Yes. Gregory Markway is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gregory Markway was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.