DR. WILLIAM MICHAEL MUNION (MD) – Emergency Medicine Physician, NPI 1255829784
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,051 EMERGENCY MEDICINE in TX
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Provider Addresses for DR. WILLIAM MICHAEL MUNION (MD)
245, Power Road, Grand Junction, Mesa County, Colorado, 81507, United States
MESA, AZ 852058413
Phone:
Type: Mailing
CHRISTUS Spohn Hospital Corpus Christi - Shoreline, 600, Elizabeth Street, Corpus Christi, Nueces County, Texas, 78404, United States
CORPUS CHRISTI, TX 784042235
Phone: (361) 861-1864
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-11-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20210625001506 | I | Emergency Medicine | AZ | TBD |
| I20251128000734 | I | Emergency Medicine | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 152 | 146 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 120 | 119 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 25 | 24 | $0 |
| 99291 | Critical care, first 30-74 minutes | 15 | 15 | $0 |
Insurance plans in this area (ZIP 85205)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| - | CA | |
| Emergency Medicine, Pathology | CA | |
| - | CA | |
| - | OH |
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