William Mallott, MD
Hospitalist Physician · San Antonio, TX
William Mallott, MD is a hospitalist physician with a practice address in San Antonio, Texas, and NPI 1679670624, issued on Sep 20, 2006. Check the license (Texas L9336, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Mallott
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- L9336 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4502 Medical Dr, San Antonio, TX 78229
- Phone
- (210) 358-4000
- Enumerated
- Sep 20, 2006
- Record last updated
- Nov 11, 2024
- Medicare enrollment
- Enrolled (PECOS I20040914000530); accepts Medicare assignment
- Medical or professional school
- Texas Tech University Health Science Center School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,587 in Texas → Look up another NPI →
Also registered at 4502 Medical Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Mallott in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L9336Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average hospitalist physician in 2024
110 Medicare Part D claims for 70 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Methocarbamol36 claims
- Celecoxib16 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 one group practice
- University OF Texas Health Science Center AT San AntonioSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Mallott among 1,587 hospitalist physician records in Texas
William Mallott, MD is one of 1,587 hospitalist physician records with a practice address in Texas. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 87% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2001 · median 2013 among the 1,298 with a school on file
- Record last updated2024 · 25% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Texas
There are 1,587 hospitalist physician records in Texas.
All 1,587 in Texas → Every provider in San Antonio → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Christine Andre, MDSan Antonio, TX 782291013928530
- Theodore Arevalo, MDSan Antonio, TX 782291922019447
- Gregory Bowling, MDSan Antonio, TX 782291275640245
- Andrea Darilek, MDSan Antonio, TX 782291053334904
- Sean Garcia, MDSan Antonio, TX 782291861509861
- Gustavo Medellin, MDSan Antonio, TX 782291871571968
- Jane O'Rorke, M.D.San Antonio, TX 782291669483541
- Raja Pathapati, M.D.San Antonio, TX 782291083669501
Common questions
What is William Mallott, MD's NPI number?
William Mallott, MD's National Provider Identifier (NPI) is 1679670624, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Mallott, MD located?
The NPPES record lists a practice address at 4502 Medical Dr, San Antonio, TX, 78229. Phone: (210) 358-4000. Providers update this record themselves, so call before visiting.
How can I verify William Mallott, MD's license?
NPPES lists Texas license number L9336, 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 Mallott, MD prescribe under Medicare Part D?
In 2024, William Mallott, MD had 110 Medicare Part D claims for 70 beneficiaries; the average among hospitalist physician prescribers was 521. 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.