Quick answers
- Which hospitals does Jack L. Deetjen work at?
- Medicare's official clinician data lists Jack L. Deetjen at 2 hospitals: Guadalupe Regional Medical Center and Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jack L. Deetjen see patients?
- Medicare's clinician data lists 4 practice locations, including Seguin, TX. Call before your visit to confirm the address.
- What is Jack L. Deetjen's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Jack L. Deetjen accept Medicare assignment?
- Yes. Medicare's clinician data says Jack L. Deetjen 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.
- What is the phone number for Jack L. Deetjen?
- (830) 401-7558, as listed in official Medicare / NPI Registry data.
- What is Jack L. Deetjen's NPI number?
- 1699723320. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jack L. Deetjen works
Medicare's Facility Affiliation Data lists Jack L. Deetjen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Guadalupe Regional Medical CenterSeguin, TX · Acute Care Hospital · CCN 450104
- Memorial HospitalGonzales, TX · Acute Care Hospital · CCN 450235
Practice locations
Addresses where Jack L. Deetjen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1215 E Court StSeguin, TX 78155 (830) 401‑7558
- 1215 E Court St, N/aSeguin, TX 78155
- 515 N King StSeguin, TX 78155 (830) 379‑8371
- 515 N King St, Suite 106Seguin, TX 78155 (830) 379‑8371
Group practices
Medicare enrollment lists Jack L. Deetjen as a member of this group (CMS data updated 2026-10-02).
- Guadalupe Regional Medical Group39 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Seguin
Clinicians with the same Medicare primary specialty in Seguin, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699723320 |
| 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