Quick answers
- Does Billie N. Corwin accept Medicare assignment?
- Medicare's clinician data says Billie N. Corwin may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Billie N. Corwin see?
- In 2024, CMS data shows 26 Original Medicare patients and 52 services for Billie N. Corwin. This counts Original Medicare only and measures volume, not quality.
- What is Billie N. Corwin's NPI number?
- 1881446631. 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 Billie N. Corwin, 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 | 52 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 86 |
Most frequent services
- Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes (99345)13 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%
- Alzheimer's disease or dementia75%
- Depression65%
- Anxiety54%
- Arthritis50%
Hospitals where Billie N. Corwin works
Medicare's Facility Affiliation Data lists Billie N. Corwin 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 Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450272
Practice locations
Addresses where Billie N. Corwin is enrolled with Medicare (CMS data updated October 2, 2026).
- 151 Stagecoach Trl, Suite 105San Marcos, TX 78666 (737) 213‑1271
- 3006 Bee Caves Rd, Suite B180Austin, TX 78746 (512) 600‑9898
Group practices
Medicare enrollment lists Billie N. Corwin as a member of these groups (CMS data updated October 2, 2026).
- BHS Physicians Network, Inc706 clinicians in the group
- Wiseman Family Practice PLLC34 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 BHS Physicians Network, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1881446631 |
| 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