Gregory Markway, PHD
NPI 1255373148 · Psychologist · Jefferson City, MO
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Markway, PHD is a Psychologist provider in Jefferson City, MO (NPI 1255373148).
Provider details
- NPI number
- 1255373148
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- License
- 01456 (MO)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
49 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 49 | $86 |
Typical Medicare-allowed amounts for these services range $86–$86 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gregory Markway's NPI number?
- Gregory Markway's National Provider Identifier (NPI) is 1255373148, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Markway's specialty?
- Gregory Markway is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Markway located?
- Gregory Markway's practice location on file with NPPES is 3702 W Truman Blvd, Jefferson City, MO 65109-4970.
- What is Gregory Markway's phone number?
- The practice phone number listed in the NPPES registry for Gregory Markway is (573) 634-5303.
- Does Gregory Markway accept Medicare?
- Gregory Markway is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Markway's NPI active?
- Yes — Gregory Markway's NPI (1255373148) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.