Quick answers
- Does Gregory R. Montoya accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory R. Montoya 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 Gregory R. Montoya see?
- In 2024, CMS data shows 26 Original Medicare patients and 55 services for Gregory R. Montoya. This counts Original Medicare only and measures volume, not quality.
- What is Gregory R. Montoya's NPI number?
- 1083614176. 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 Gregory R. Montoya, 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 | 26 |
|---|---|
| Services billed to Medicare | 55 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 48 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)21 services
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 pressure65%
- Anxiety62%
- High cholesterol46%
- Depression42%
Hospitals where Gregory R. Montoya works
Medicare's Facility Affiliation Data lists Gregory R. Montoya at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- CHRISTUS St Michael Health SystemTexarkana, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450801
Practice locations
Addresses where Gregory R. Montoya is enrolled with Medicare (CMS data updated October 2, 2026).
- 7470 State Hwy 154Marshall, TX 75670
Group practices
Medicare enrollment lists Gregory R. Montoya as a member of this group (CMS data updated October 2, 2026).
- Sabine Valley Regional MHMR Center18 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in Sabine Valley Regional MHMR Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1974 (52 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1083614176 |
| 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
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 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