WILLIAM MALLOTT MD
NPI 1679670624
Hospitalist in San Antonio, TX
About William Mallott Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM MALLOTT MD (NPI 1679670624) is an individual hospitalist provider in San Antonio, Texas, licensed in Texas (L9336) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with University Health System, and maintains a secondary practice location in San Antonio.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
William Mallott Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show William Mallott reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: University Of Texas Health Science Center At San Antonio
- 2,397 clinicians in this Medicare group
San Antonio, TX 78205
- Reassigned Medicare billing, Texas enrollment
- 478 clinicians in this Medicare group
Spring, TX 77381
- Reassigned Medicare billing, Texas enrollment
- 180 clinicians in this Medicare group
Humble, TX 77338
- Reassigned Medicare billing, Texas enrollment
- 2,009 clinicians in this Medicare group
Dallas, TX 75246
- Reassigned Medicare billing, Texas enrollment
- 1,044 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Health System
Acute Care Hospitals · San Antonio, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78229 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Mallott's NPI number?
The NPI number for William Mallott is 1679670624. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is William Mallott located?
William Mallott practices at 4502 Medical Dr, San Antonio, TX 78229. The listed phone number is (210) 358-4000.
What is William Mallott's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is William Mallott enrolled in Medicare?
Yes. William Mallott is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for William Mallott's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Mallott reassigns Medicare benefits to 5 organizations: Uthscsa Dental School (San Antonio, TX), Sound Inpatient Physicians Of Texas I, Inc (San Antonio, TX), 24 Hour Physicians, Inc (Spring, TX), Hospitalist Medicine Physicians Of Texas, PLLC (Humble, TX) and Century Integrated Partners, Inc (Dallas, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Mallott's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Mallott accept?
Health plans from Blue Cross and Blue Shield of Texas, Community First, Imperial Insurance Companies, Inc. and Molina Healthcare list William Mallott as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is William Mallott affiliated with any hospitals?
According to CMS data, William Mallott is affiliated with University Health System.
When was this NPI record last updated?
The NPPES record for William Mallott was last updated on November 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# William Mallott, MD · NPI 1679670624
Hospitalist physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1679670624 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** L9336 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 4502 MEDICAL DR, San Antonio, TX 78229-4402
- **Phone:** (210) 358-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Uthscsa Dental School (NPI 1750403887, San Antonio, TX); Sound Inpatient Physicians Of Texas I, Inc (NPI 1811321797, San Antonio, TX); 24 Hour Physicians, Inc (NPI 1396083424, Spring, TX); Hospitalist Medicine Physicians Of Texas, PLLC (NPI 1629307095, Humble, TX); Century Integrated Partners, Inc (NPI 1447615711, Dallas, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Texas Tech University Health Science Center School Of Medicine, class of 2001
## Record status
- **NPPES last updated:** November 11, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1679670624) · Data from the CMS NPPES public registry.