Quick answers
- Does Mary G. Vollmert accept Medicare assignment?
- Yes. Medicare's clinician data says Mary G. Vollmert 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.
- How many Medicare patients does Mary G. Vollmert see?
- In 2024, CMS data shows 12 Original Medicare patients and 63 services for Mary G. Vollmert. This counts Original Medicare only and measures volume, not quality.
- What is Mary G. Vollmert's NPI number?
- 1396844999. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary G. Vollmert, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 12 |
|---|---|
| Services billed to Medicare | 63 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis75%
Hospitals where Mary G. Vollmert works
Medicare's Facility Affiliation Data lists Mary G. Vollmert at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHI St. Luke's Lakeside HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670059
Practice locations
Addresses where Mary G. Vollmert is enrolled with Medicare (CMS data updated October 2, 2026).
- 9200 New Trails DrThe Woodlands, TX 77381 (281) 364‑9509
Group practices
Medicare enrollment lists Mary G. Vollmert as a member of this group (CMS data updated October 2, 2026).
- The Greater Houston Neurosurgery Center, P.A.6 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in The Woodlands
Clinicians with the same Medicare primary specialty in The Woodlands, TX — not a recommendation.
Other clinicians in The Greater Houston Neurosurgery Center, P.A.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2000 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396844999 |
| 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 October 2, 2026, retrieved October 29, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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