Quick answers
- Does Willis Holloway Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Willis Holloway Jr. 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 Willis Holloway Jr. see?
- In 2024, CMS data shows 81 Original Medicare patients and 135 services for Willis Holloway Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Willis Holloway Jr.'s NPI number?
- 1023054434. 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 Willis Holloway Jr., 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 | 81 |
|---|---|
| Services billed to Medicare | 135 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 55 |
Most frequent services
- Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes (99347)81 services
- Testing for presence of drug, read by direct observation (80305)37 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).
- Anxiety75%
- High blood pressure67%
- Depression63%
- High cholesterol44%
- Diabetes28%
- Arthritis25%
Practice locations
Addresses where Willis Holloway Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 6613 N Meridian AveOklahoma City, OK 73116 (405) 603‑8450
Group practices
Medicare enrollment lists Willis Holloway Jr. as a member of this group (CMS data updated October 2, 2026).
- Holloway Group Inc6 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Other clinicians in Holloway Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1023054434 |
| 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