Roger R Guillemette, M.D.
Internal Medicine · Saint Louis, MO
At a glance
3009 N Ballas Rd Ste 387C, Saint Louis, MO 63131-2324
NPPES record updated Feb 19, 2021. 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
3009 N Ballas Rd Ste 387CSaint Louis, MO 63131-2324
Additional reported practice locations
3009 N Ballas RdSte 387C
Saint Louis, MO 631312322
Phone: 3149965900
Fax: 3149965910
Education & affiliations
- Medical / professional school
- Geisel School Of Medicine At Dartmouth
- Graduation year
- 1992
- CMS specialties
- Internal Medicine
Practice groups
Reported hospital affiliations
- Barnes Jewish Hospital Saint Louis, MO
- Mercy Hospital South Saint Louis, MO
- Mercy Hospital St Louis Saint Louis, MO
- Missouri Baptist Medical Center Saint Louis, MO
- Ssm Health St Mary's Hospital - St Louis Saint Louis, 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 | $14.38 |
Reporting companies
| Company | Amount |
|---|---|
| ABBVIE INC. | $14.38 |
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
- Internal Medicine
- Taxonomy code
- 207R00000X
- Enumeration date
- Jul 10, 2006
- Record updated
- Feb 19, 2021
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207R00000X · Primary
License reported: 108658 MO
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
3009 N Ballas Rd Ste 387CSaint Louis, MO 63131-2324
- Phone
- (314) 996-5900
Mailing address
3009 N BALLAS RD STE 387CSAINT LOUIS, MO 631312324
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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