Joel Riley, M.D.
NPI 1164440301 · Gastroenterology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joel Riley, M.D. is a Gastroenterology Physician provider in Saint Louis, MO (NPI 1164440301).
Provider details
- NPI number
- 1164440301
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MDR7G19 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 135 | $149 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 117 | $87 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 114 | $75 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 91 | $83 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 52 | $234 |
| Colorectal Cancer Screening; Colonoscopy on Individual Not Meeting Criteria for High Risk |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 216 | 67 |
| Omeprazole | 179 | 66 |
| Pantoprazole Sodium | 175 | 56 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 76 | 71 |
| Linaclotidebrand: Linzess | 75 | 27 |
| Mesalamine | 59 | 15 |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 57 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2020-10-26
- Certified
- 2020-10-26
Frequently asked questions
- What is Joel Riley's NPI number?
- Joel Riley's National Provider Identifier (NPI) is 1164440301, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joel Riley's specialty?
- Joel Riley is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Joel Riley located?
- Joel Riley's practice location on file with NPPES is 6400 Clayton Rd, Saint Louis, MO 63117-1850.
- What is Joel Riley's phone number?
- The practice phone number listed in the NPPES registry for Joel Riley is (314) 951-5368.
- Does Joel Riley accept Medicare?
- Joel Riley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joel Riley's NPI active?
- Yes — Joel Riley's NPI (1164440301) is active in the NPPES registry as of the last update on 2020-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.