Physician Profile
William E. Holloway, MD practices vascular & interventional radiology in Saint Louis, MO. William is a 2002 graduate of University of Chicago, Pritzker School of Medicine. According to Medicare claims data, William cared for 2,039 Medicare patients across 2,144 services. The services billed most often include ct scan head or brain without contrast, mri scan of brain before and after contrast, and ct scan of upper spine without contrast.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
226 N BOYLE AVE APT 2N
Saint Louis, MO 63108
Within Interventional Radiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Most searched conditions
Bone & Joint
Brain & Spine
Cancer
Digestive
Emergency vascular
Endocrine
Joint & bone pain
Kidney
Men's health
Pain
Respiratory
Vascular
Women's health
Most searched procedures
Bone & Joint
Brain & Spine
Cancer
Diagnostic
Digestive
Drainage
Emergency vascular
Endocrine
Joint & bone pain
Kidney
Kidney & Urinary
Men's health
Pain
Vascular
Vascular access
Women's health
2,144 services · 2,039 patients · 20 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance | Procedure | 61645 |
11 | Less often than most peers in Vascular & Interventional… |
| Ct scan head or brain without contrast | Imaging | 70450 |
788 | More than most peers in Vascular & Interventional… |
| Mri scan of brain before and after contrast | Imaging | 70553 |
271 | More than most peers in Vascular & Interventional… |
| Ct scan of upper spine without contrast | Imaging | 72125 |
216 | More than most peers in Vascular & Interventional… |
| Ct scan of lower spine without contrast | Imaging | 72131 |
105 | More than most peers in Vascular & Interventional… |
| Mri scan of lower spinal canal without contrast | Imaging | 72148 |
102 | More often than most peers in Vascular & Interventional… |
| Ct scan of blood vessels of neck with contrast | Imaging | 70498 |
99 | More often than most peers in Vascular & Interventional… |
| Ct scan of blood vessels of head with contrast | Imaging | 70496 |
99 | More often than most peers in Vascular & Interventional… |
| Mri scan of brain without contrast | Imaging | 70551 |
92 | More often than most peers in Vascular & Interventional… |
| Ct scan of face without contrast | Imaging | 70486 |
62 | More often than most peers in Vascular & Interventional… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Dr. Holloway is an interventional radiologist in Saint Louis, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Vascular & Interventional Radiology”.
NPI registry
Dr. Holloway is listed at 226 N Boyle Ave Apt 2N, Saint Louis, MO 63108. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (314) 535-3601. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Dr. Holloway's National Provider Identifier is 1649396334. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. Holloway attended University of Chicago, Pritzker School of Medicine, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
Dr. Holloway has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Dr. Holloway performs procedures including removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance; reads or performs imaging such as ct scan head or brain without contrast and mri scan of brain before and after contrast. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Holloway. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.