DR. WILLIAM EDWARD HOLLOWAY (MD) – Vascular & Interventional Radiology Physician, NPI 1649396334
Vascular & Interventional Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,218 DIAGNOSTIC RADIOLOGY in MO
Provider Addresses for DR. WILLIAM EDWARD HOLLOWAY (MD)
226 N BOYLE AVE APT 2N
SAINT LOUIS, MO 631082922
Phone: (314) 535-3601
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-11-04
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090714000103 | I | Diagnostic Radiology | MO | TBD |
| I20180110001040 | I | Diagnostic Radiology | KS | TBD |
| I20241104002209 | I | Diagnostic Radiology | CO | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 70450 | Ct scan head or brain without contrast | 932 | 825 | $0 |
| 70553 | Mri scan of brain before and after contrast | 324 | 309 | $0 |
| 72125 | Ct scan of upper spine without contrast | 273 | 267 | $0 |
| 70496 | Ct scan of blood vessels of head with contrast | 126 | 124 | $0 |
| 70498 | Ct scan of blood vessels of neck with contrast | 123 | 121 | $0 |
Insurance plans in this area (ZIP 63108)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | MO | |
| Diagnostic Radiology | MO | |
| Diagnostic Radiology | MO | |
| N E U R O L O G Y | IA |
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