Quick answers
- Does Elizabeth A. Grizzaffi accept Medicare assignment?
- Yes. Medicare's clinician data says Elizabeth A. Grizzaffi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Elizabeth A. Grizzaffi's NPI number?
- 1124311584. 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 Elizabeth A. Grizzaffi is enrolled with Medicare (CMS data updated October 2, 2026).
- 14811 Saint Marys Ln, Suite 270Houston, TX 77079 (281) 497‑3500
Group practices
Medicare enrollment lists Elizabeth A. Grizzaffi as a member of this group (CMS data updated October 2, 2026).
- Martha St. John, M.D., P.A.2 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in Martha St. John, M.D., P.A.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124311584 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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