Quick answers
- Which hospitals does David R. Knowles work at?
- Medicare's official clinician data lists David R. Knowles at 5 hospitals: Fairfield Memorial Hospital 1, Good Samaritan Regional Health Center, Memorial Hospital of Carbondale, Salem Township Hospital and SSM Health St Mary's Hospital -Centralia. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David R. Knowles see patients?
- Medicare's clinician data lists 1 practice location in Mount Vernon, IL. Call before your visit to confirm the address.
- What is David R. Knowles's specialty?
- Medicare lists Urology as the primary specialty.
- Does David R. Knowles accept Medicare assignment?
- Yes. Medicare's clinician data says David R. Knowles accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does David R. Knowles offer telehealth?
- Medicare's clinician data says David R. Knowles offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for David R. Knowles?
- (618) 244-4060, as listed in official Medicare / NPI Registry data.
- What is David R. Knowles's NPI number?
- 1881699908. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David R. Knowles works
Medicare's Facility Affiliation Data lists David R. Knowles at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Fairfield Memorial Hospital 1Fairfield, IL · Critical Access Hospital · CCN 141311
- Good Samaritan Regional Health CenterMount Vernon, IL · Acute Care Hospital · CCN 140046
- Memorial Hospital of CarbondaleCarbondale, IL · Acute Care Hospital · CCN 140164
- Salem Township HospitalSalem, IL · Critical Access Hospital · CCN 141345
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · CCN 140034
Practice locations
Addresses where David R. Knowles is enrolled with Medicare (CMS data updated 2026-10-02).
- 4109 S Water Tower PlMount Vernon, IL 62864 (618) 244‑4060
Group practices
Medicare enrollment lists David R. Knowles as a member of this group (CMS data updated 2026-10-02).
- Advanced Urologic Surgeons PC2 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1881699908 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians