Gregory P. McLennan II, MD
NPI 1912160052ActiveIndividual· Urology· Saint Louis, MO
Urology (MD) in Saint Louis, Missouri, trained at Saint Louis University School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $399,672 for 2,937 claims, against $235,992 paid for services in 2024. Calyxo, Inc. was the largest of 32 companies reporting payments in 2025, $59,699 in all, mostly consulting fees.
Overview
| NPI | 1912160052 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 9, 2008 |
| Last updated in NPPES | Sep 2, 2026 |
| Certified by provider | Sep 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 2014009247 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (IL); Practitioner - Urology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 761 |
|---|---|
| Services billed | 4,718 across 89 procedure codes |
| Paid by Medicare | $235,992 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,937 · 5,465 30-day fills |
|---|---|
| Patients | 735 |
| Total drug cost | $399,672 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Urology |
| Telehealth | Offers telehealth |
Medical groups
- Blessing HospitalQuincy, IL · 421 clinicians
- Mercy Clinic Urology LLCSaint Louis, MO · 26 clinicians
Hospital affiliations
- Blessing HospitalQuincy, IL
- Mercy Hospital LincolnTroy, MO
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
- Mercy Hospital WashingtonWashington, MO
Industry payments (Open Payments)
- 2025$59,699 · 191 payments from 32 companies
- 2024$7,677 · 152 payments from 32 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calyxo, Inc. | $55,220 | 71 |
| Procept Biorobotics Corporation | $1,394 | 16 |
| Karl Storz Endoscopy-America | $603.12 | 2 |
| Teleflex LLC | $457.63 | 4 |
| Urogen Pharma, Inc. | $286.05 | 7 |
What the 2025 payments were for
- Consulting Fee$46,103 · 23 payments
- Travel and Lodging$8,546 · 32 payments
- Food and Beverage$4,699 · 135 payments
- Honoraria$350.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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