Roger R. Guillemette, M.D.
Internal Medicine Physician · Saint Louis, MO
Roger R. Guillemette, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1417981333, issued on Jul 10, 2006. Check the license (Missouri 108658, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Roger R. Guillemette
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 108658 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3009 N Ballas RD Ste 387C, Saint Louis, MO 63131
- Phone
- (314) 996-5900
- Enumerated
- Jul 10, 2006
- Record last updated
- Feb 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080716000502); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 1992
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 3009 N Ballas RD Ste 387C
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Roger R. Guillemette in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 108658Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average internal medicine physician in 2024
13,030 Medicare Part D claims for 829 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 223 claims were for opioids.
Most prescribed
- Atorvastatin Calcium759 claims
- Metoprolol Succinate566 claims
- Irbesartan540 claims
- Hydrochlorothiazide531 claims
- Levothyroxine Sodium500 claims
- Amlodipine Besylate454 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Aging Well Health Care, LLCSaint Louis, MO
- Physician Groups LCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roger R. Guillemette among 2,604 internal medicine physician records in Missouri
Roger R. Guillemette, M.D. is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1992 · median 2006 among the 1,443 with a school on file
- Record last updated2021 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Asim Ali, MDSaint Louis, MO 631311821047218
- Paul Altsheler, MDSaint Louis, MO 631311346225372
- Richard Bligh, MDSaint Louis, MO 631311306813050
- J Corder, MDSaint Louis, MO 631311184698987
- Thomas Greco, M.D.Saint Louis, MO 631311417920927
- Zahirul Haque, MDSaint Louis, MO 631311578536546
- Joseph Hilgeman, MDDes Peres, MO 631311407820145
- Andrea Holthaus, MDSaint Louis, MO 631311528031473
Common questions
What is Roger R. Guillemette, M.D.'s NPI number?
Roger R. Guillemette, M.D.'s National Provider Identifier (NPI) is 1417981333, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger R. Guillemette, M.D. located?
The NPPES record lists a practice address at 3009 N Ballas RD Ste 387C, Saint Louis, MO, 63131. Phone: (314) 996-5900. Providers update this record themselves, so call before visiting.
How can I verify Roger R. Guillemette, M.D.'s license?
NPPES lists Missouri license number 108658, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Roger R. Guillemette, M.D. prescribe under Medicare Part D?
In 2024, Roger R. Guillemette, M.D. had 13,030 Medicare Part D claims for 829 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.