Robert Gordon Swanson, M.D.
Radiation Oncology (CMS) · St. Louis, MO
At a glance
6420 Clayton Rd., St. Louis, MO 63117-1850
NPPES record updated Feb 20, 2025. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
6420 Clayton Rd. St. Mary's Health CenterSt. Louis, MO 63117-1850
Additional reported practice locations
1000 W 10Th StRolla, MO 654012905
Phone: 5733649000
Fax: 5734262108 1060 W 10Th St
Rolla, MO 654012905
Phone: 8554063324
Fax: 5734588363 1000 W 10Th St
Rolla, MO 654012905
Phone: 5734588899
Fax: 5733415611
Education & affiliations
- Medical / professional school
- Washington University School Of Medicine
- Graduation year
- 1991
- CMS specialties
- Radiation Oncology
Practice groups
Reported hospital affiliations
- Phelps County Regional Medical Center Rolla, MO
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $179.88 |
Reporting companies
| Company | Amount |
|---|---|
| MERCK SHARP & DOHME LLC | $37.59 |
| TAKEDA PHARMACEUTICALS U.S.A., INC. | $26.68 |
| REGENERON HEALTHCARE SOLUTIONS, INC. | $23.55 |
| JANSSEN BIOTECH, INC. | $21.62 |
| STEMLINE THERAPEUTICS INC. | $19.48 |
| LILLY USA, LLC | $18.96 |
| ASTRAZENECA PHARMACEUTICALS LP | $16.76 |
| INCYTE CORPORATION | $15.24 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Radiation Oncology (CMS)
- Taxonomy code
- 2085R0001X
- Enumeration date
- Jun 12, 2006
- Record updated
- Feb 20, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
2085R0001X
License reported: 251157 NY
2085R0001X
License reported: 21117 OK
2085R0001X · Primary
License reported: 101788 MO
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
6420 Clayton Rd.St. Mary's Health Center
St. Louis, MO 63117-1850
- Phone
- (314) 768-8267
Mailing address
500 MEDICAL PARKWENTZVILLE, MO 63385
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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