Quick answers
- Does Michael R. Warren Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Michael R. Warren Jr. 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 Michael R. Warren Jr. see?
- In 2024, CMS data shows 50 Original Medicare patients and 85 services for Michael R. Warren Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Michael R. Warren Jr.'s NPI number?
- 1821655770. 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 Michael R. Warren Jr., 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 | 50 |
|---|---|
| Services billed to Medicare | 85 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Critical care, first 30-74 minutes (99291)35 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)29 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 pressure75%
- High cholesterol75%
- Diabetes75%
- Chronic kidney disease72%
- Heart failure68%
- Ischemic heart disease66%
Hospitals where Michael R. Warren Jr. works
Medicare's Facility Affiliation Data lists Michael R. Warren Jr. 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.
- Valley Regional Medical CenterBrownsville, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450662
Practice locations
Addresses where Michael R. Warren Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 E Alton Gloor Blvd, Valley Rgnl Med CntrBrownsville, TX 78526 (956) 350‑7000
- 1100 E Dove Ave, Suite 300McAllen, TX 78504 (956) 362‑8170
Group practices
Medicare enrollment lists Michael R. Warren Jr. as a member of these groups (CMS data updated October 2, 2026).
- Intensivist Medicine Services of TX, PLLC35 clinicians in the group
- Renaissance Specialty Surgery26 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Brownsville
Clinicians with the same Medicare primary specialty in Brownsville, TX — not a recommendation.
Other clinicians in Intensivist Medicine Services of TX, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821655770 |
| 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