Quick answers
- Where does Marissa L. Johnson see patients?
- Medicare's clinician data lists 4 practice locations, including San Antonio, TX and Floresville, TX. Call before your visit to confirm the address.
- What is Marissa L. Johnson's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Marissa L. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa L. Johnson 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 Marissa L. Johnson?
- (210) 491-9966, as listed in official Medicare / NPI Registry data.
- What is Marissa L. Johnson's NPI number?
- 1740256742. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Marissa L. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 150 E Sonterra Blvd, Suite 110San Antonio, TX 78258 (210) 491‑9966
- 499 10th StFloresville, TX 78114 (830) 393‑1400
- 520 E Euclid AveSan Antonio, TX 78212 (210) 581‑9277
- 7400 Barlite BlvdSan Antonio, TX 78224 (210) 921‑2000
Group practices
Medicare enrollment lists Marissa L. Johnson as a member of these groups (CMS data updated 2026-10-02).
- Emergenchealth PLLC1,056 clinicians in the group
- Endo Sedation LLC293 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Texas →
Other nurse anesthetists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2003 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740256742 |
| 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
- 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