William Michael Munion, MD
Emergency Medicine Physician · Corpus Christi, TX
William Michael Munion, MD is an emergency medicine physician with a practice address in Corpus Christi, Texas, and NPI 1255829784, issued on Apr 30, 2018. Check the license (Texas S4197, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Michael Munion
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- S4197 TX
63049 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 600 Elizabeth St, Corpus Christi, TX 78404
- Phone
- (361) 861-1864
- Enumerated
- Apr 30, 2018
- Record last updated
- Jun 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20251128000734); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 600 Elizabeth St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Michael Munion in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S4197Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average emergency medicine physician in 2024
248 Medicare Part D claims for 152 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Prednisone43 claims
- Amoxicillin-Clavulanate Potass27 claims
- Ondansetron Odt20 claims
- Cephalexin18 claims
- Azithromycin15 claims
- Cyclobenzaprine Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Sonoma Valley Emergency Physicians Medical Group, IncPetaluma, CA
- Tec Emergency Physicians OF Arizona, LLCMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Michael Munion among 4,885 emergency medicine physician records in Texas
William Michael Munion, MD is one of 4,885 emergency medicine physician records with a practice address in Texas. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 77% of them.
- NPI issued2018 · 77% of these records are older, 19% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2018 · median 2013 among the 2,779 with a school on file
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
155 emergency medicine physician records list a practice address in Corpus Christi
They are 155 of the 5,600 NPPES records with a practice address in Corpus Christi, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Corpus Christi → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Nicholas Bown, MDCorpus Christi, TX 784041124068234
- Cadyn Crawford, MDCorpus Christi, TX 784041487159372
- Jordyn Ewbank, DOCorpus Christi, TX 784041437656410
- Mark Flora, M.D.Corpus Christi, TX 784041366860918
- Shani ItaliyaCorpus Christi, TX 784041558757443
- Paul Jackson, DOCorpus Christi, TX 784041114422599
- Kathryn Kirkland, M.D.Corpus Christi, TX 784041093732638
- Lamar MoodyCorpus Christi, TX 784041336307081
Common questions
What is William Michael Munion, MD's NPI number?
William Michael Munion, MD's National Provider Identifier (NPI) is 1255829784, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Munion, MD located?
The NPPES record lists a practice address at 600 Elizabeth St, Corpus Christi, TX, 78404. Phone: (361) 861-1864. Providers update this record themselves, so call before visiting.
How can I verify William Michael Munion, MD's license?
NPPES lists Texas license number S4197, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Michael Munion, MD prescribe under Medicare Part D?
In 2024, William Michael Munion, MD had 248 Medicare Part D claims for 152 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.