Dr. Roger R. Guillemette, MD
- Medicare services, 2024
- 1,806
- Medicare patients, 2024
- 368
- Part D claims, 2024
- 13,030
- Hospital affiliations
- 7
- Industry payments
- $136
- Practice address
- 3015 N Ballas Rd, Saint Louis, MO 63131
- Practice phone
- Call (314) 996-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Guillemette's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Roger R. Guillemette is an internist in Saint Louis, Missouri
Dr. Guillemette practices at Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health.
Dr. Guillemette's NPI, 1417981333, was assigned on July 10, 2006. Dr. Guillemette graduated from Geisel School of Medicine at Dartmouth in 1992. Dr. Guillemette holds Missouri license 108658.
- NPI
- 1417981333NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224101712
- NPI enumeration date
- July 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 996-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Roger R. Guillemette practices at Missouri Baptist Medical Center in Saint Louis, Missouri
Dr. Guillemette's primary practice is Missouri Baptist Medical Center, at 3015 N Ballas Rd, Saint Louis, MO 63131 in St. Louis County. The practice phone is (314) 996-5000.
- Missouri Baptist Medical Center3015 N Ballas Rd, Saint Louis, MO 63131 · St. Louis CountyPhone(314) 996-5000
Source: Dmand AI Affiliation Data
Dr. Roger R. Guillemette is affiliated with 8 sites of care and 1 medical group
Dr. Guillemette's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dr. Guillemette is also affiliated with Barnes-Jewish Hospital. The medical group on file is BJC Medical Group. Dmand AI also links Dr. Guillemette to 5 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Roger R. Guillemette's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guillemette practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Missouri Baptist Medical Center | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roger R. Guillemette is one of 2,114 internists in Missouri
Internal medicine is Dr. Guillemette's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Guillemette is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Guillemette
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Roger R. Guillemette billed Medicare for 1,806 services in 2024
CMS data shows 1,806 Medicare services from Dr. Guillemette across 17 procedure codes in 2024, for 368 Medicare patients. Medicare paid $101,757 for them.
Dr. Guillemette's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8412024: 8074%
- Surgery
- 2023: 3492024: 3354%
- Other services
- 2023: 3832024: 30620%
- Lab and pathology
- 2023: 2262024: 2203%
- Drugs given in the office
- 2023: 02024: 78
- Tests and treatments
- 2023: 1152024: 6048%
Where Dr. Guillemette's Medicare services took place, 2024
- In an office1,54686%
- In a facility26014%
Dr. Guillemette compared with the Missouri median for internists, 2024
- Dr. Guillemette
- Missouri median
- Medicare services
- 1,806vs 5303.4 times
- Medicare patients
- 368vs 21174% above
- Part D claims
- 12,261vs 32537.7 times
Medians across 2,076 internists in Missouri with Dmand AI profiles that report each measure.
Dr. Guillemette's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Guillemette and other internists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roger R. Guillemette treated 368 Medicare patients in 2024, average age 76
CMS counts 368 Medicare patients who saw Dr. Guillemette in 2024. The largest group is 65 to 74, with 172 patients. 74% of them have high blood pressure, and 69% have high cholesterol. 3% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Guillemette's median patient age at 68, with 51% women.
Dr. Guillemette's Medicare patients by age, 2024
Dr. Guillemette's Medicare patients by sex, 2024
- Women20155%
- Men16745%
Chronic conditions among Dr. Guillemette's Medicare patients, 2024
- High blood pressure74%
- High cholesterol69%
- Arthritis47%
- Ischemic heart disease25%
- Diabetes23%
- Cancer21%
- Chronic kidney disease21%
- Atrial fibrillation19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guillemette's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roger R. Guillemette wrote 13,030 Medicare Part D claims in 2024
In 2024, Dr. Guillemette wrote 13,030 Medicare Part D claims for 829 patients. 90% of them were for generic drugs. CMS names the drug for 12,261 of them, across 162 drugs with 11 or more claims each, at $614,516 in total drug cost. In 2023, CMS named 11,300 claims across 154 drugs.
Dr. Guillemette's Part D claims by kind of drug, 2024
- Generic11,747 claims90%
- Brand-name1,231 claims9%
- Other52 claims0%
Dr. Guillemette's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Guillemette's Part D claims, 2024
- Opioids2%223 of 13,030 claims
- Antibiotics4%483 of 13,030 claims
- Antipsychotics, patients 65 and over0%49 of 13,030 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 11,3002024: 12,2619%
Drugs named by CMS: 162 in 2024, 154 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Roger R. Guillemette takes part in Medicare
Dr. Guillemette accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Roger R. Guillemette received $136 in industry payments from 2020 to 2025
CMS Open Payments shows 3 general payments to Dr. Guillemette from 3 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $109.
General payments to Dr. Guillemette by program year, 2020 to 2025
Companies that paid Dr. Guillemette the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Roger R. Guillemette graduated from Geisel School of Medicine at Dartmouth
Dr. Guillemette graduated from Geisel School of Medicine at Dartmouth in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Roger R. Guillemette's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Roger R. Guillemette
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Roger R. Guillemette's NPI number?
Dr. Roger R. Guillemette's NPI number is 1417981333. It was assigned on July 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roger R. Guillemette?
Dr. Roger R. Guillemette is an internist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Roger R. Guillemette practice?
Dr. Guillemette practices at 3015 N Ballas Rd, Saint Louis, MO 63131. Dr. Guillemette's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dmand AI also links Dr. Guillemette to 5 hospitals and 1 group practice or clinic.
What is Dr. Roger R. Guillemette's office phone number?
The practice phone on file for Dr. Guillemette is (314) 996-5000.
What is Dr. Roger R. Guillemette's medical license number?
Dr. Guillemette holds Missouri license 108658.
Which hospitals is Dr. Roger R. Guillemette affiliated with?
Dr. Guillemette practices at Missouri Baptist Medical Center in Saint Louis, Missouri. Dr. Guillemette is also affiliated with Barnes-Jewish Hospital. Dmand AI links Dr. Guillemette to 5 more hospitals.
What medical group is Dr. Roger R. Guillemette part of?
Dr. Guillemette is linked to BJC Medical Group.
Does Dr. Roger R. Guillemette accept Medicare?
Yes. CMS data shows Dr. Guillemette billed Medicare for 1,806 services in 2024, and Dr. Guillemette accepts Medicare assignment.
How many Medicare patients does Dr. Roger R. Guillemette see?
CMS counts 368 Medicare patients who saw Dr. Guillemette in 2024, with an average age of 76.
What services does Dr. Roger R. Guillemette bill to Medicare?
In 2024, Dr. Guillemette's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G0439).
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Where did Dr. Roger R. Guillemette go to medical school?
Dr. Guillemette graduated from Geisel School of Medicine at Dartmouth in 1992.
What drugs does Dr. Roger R. Guillemette prescribe most?
In 2024 Medicare Part D data, Dr. Guillemette's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Irbesartan.
Has Dr. Roger R. Guillemette received payments from drug or device companies?
CMS Open Payments shows $136 in general payments to Dr. Guillemette from 3 companies from 2020 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Roger R. Guillemette been practicing?
Dr. Guillemette graduated from medical school in 1992, 34 years ago.
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