Quick answers
- Does Michael W. Van Dyne Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Michael W. Van Dyne 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 W. Van Dyne Jr. see?
- In 2024, CMS data shows 149 Original Medicare patients and 258 services for Michael W. Van Dyne Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Michael W. Van Dyne Jr.'s NPI number?
- 1548768542. 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 W. Van Dyne 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 | 149 |
|---|---|
| Services billed to Medicare | 258 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)46 services
- Emergency department visit with moderate level of medical decision making (99284)39 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)36 services
- Injection of drug or substance under skin or into muscle (96372)25 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)24 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 pressure72%
- High cholesterol65%
- Arthritis41%
- Anxiety38%
- Diabetes35%
- Depression30%
Hospitals where Michael W. Van Dyne Jr. works
Medicare's Facility Affiliation Data lists Michael W. Van Dyne 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.
- CHRISTUS Santa Rosa Medical CenterSan Antonio, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450237
Practice locations
Addresses where Michael W. Van Dyne Jr. is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1301 Wonder World DrSan Marcos, TX 78666 (512) 353‑8979
- 1434 E Sonterra Blvd, Suite 101San Antonio, TX 78258 (210) 686‑8000
- 20475 Hwy 46 W, Suite 100Spring Branch, TX 78070 (830) 438‑6911
- 244 Creekside XingNew Braunfels, TX 78130 (830) 608‑5600
- 333 N Santa RosaSan Antonio, TX 78207 (210) 704‑2011
Group practices
Medicare enrollment lists Michael W. Van Dyne Jr. as a member of these groups (CMS data updated October 2, 2026).
- Emergency Medicine Services of TX, PLLC400 clinicians in the group
- Comal Emergency Physicians PLLC91 clinicians in the group
- Bexar Emergency Physicians PLLC46 clinicians in the group
- My Urgent Clinic LLC7 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, TX — not a recommendation.
Other clinicians in Emergency Medicine Services of TX, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548768542 |
| 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