Roger Guillemette, M.D.
NPI 1417981333 · Internal Medicine Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roger Guillemette, M.D. is a Internal Medicine Physician provider in Saint Louis, MO (NPI 1417981333).
Provider details
- NPI number
- 1417981333
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 108658 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,668 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 325 | $123 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 277 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 244 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 200 | $87 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 164 | $75 |
| Hemoglobin A1c Level83036 | 123 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 162 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 759 | 195 |
| Metoprolol Succinate | 566 | 144 |
| Irbesartan | 540 | 127 |
| Hydrochlorothiazide | 531 | 142 |
| Levothyroxine Sodium | 500 | 103 |
| Amlodipine Besylate | 454 | 122 |
| Alprazolam | 331 |
Practice location
Mailing address
Additional practice locations (1)
- 3009 N Ballas RdSte 387cSaint Louis, MO 63131-2322Phone: (314) 996-5900Fax: (314) 996-5910
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2021-02-19
- Certified
- 2021-02-19
Frequently asked questions
- What is Roger Guillemette's NPI number?
- Roger Guillemette's National Provider Identifier (NPI) is 1417981333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roger Guillemette's specialty?
- Roger Guillemette is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Roger Guillemette located?
- Roger Guillemette's practice location on file with NPPES is 3009 N Ballas Rd Ste 387c, Saint Louis, MO 63131-2324.
- What is Roger Guillemette's phone number?
- The practice phone number listed in the NPPES registry for Roger Guillemette is (314) 996-5900.
- Does Roger Guillemette accept Medicare?
- Roger Guillemette is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roger Guillemette's NPI active?
- Yes — Roger Guillemette's NPI (1417981333) is active in the NPPES registry as of the last update on 2021-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.