William James Parker, M.D.
Surgery Physician · San Antonio, TX
William James Parker, M.D. is a surgery physician with a practice address in San Antonio, Texas, and NPI 1295778686, issued on Jun 13, 2006. Check the license (Texas H8309, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William James Parker
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- H8309 TX
Self-reported in NPPES; status is on the state search - Practice location
- 19016 Stone Oak Pkwy Ste 180, San Antonio, TX 78258
- Phone
- (866) 552-4866
- Enumerated
- Jun 13, 2006
- Record last updated
- Mar 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20160701000381); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1989
- Entity
- Type 1 · individual
Also registered at 19016 Stone Oak Pkwy Ste 180
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Krystal Broughton, MPAS, PA-CPhysician Assistant1144664327
- Patrick Hartsell, MDVascular Surgery Physician1689679151
- Mary Parker, MDPhlebology Physician1861506032
Verify William James Parker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H8309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average surgery physician in 2024
17 Medicare Part D claims, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 71% of claims.
Most prescribed
- Xarelto12 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.
The MIPS final score for 2023 (Medicare payment program): 73 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $9,901.97
11 payments; by number, the most common kind was food and beverage; the largest payer was AngioDynamics, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Interventional Partners PLLCSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Surgery Physician providers in Texas
There are 2,192 surgery physician records in Texas.
Other surgery physician records in Texas
- Alan Abando, M.D.Cedar Park, TX1073561387
- Babak Abbassi, M.D.Greenville, TX1992151385
- Steven Abbate, MDSan Antonio, TX1235117433
- John Abbott, M.D.Rowlett, TX1255540936
- Kareem Abdelfattah, MDDallas, TX1053510339
- John Abdelsayed, MDSugar Land, TX1578983839
- Ziad Abdo, M.D.Dallas, TX1700838414
- Alan Abel, MDBig Spring, TX1518966829
- Stephen Abernathy, M.D.Temple, TX1851389779
- John Abikhaled, M.D.Austin, TX1639108731
Common questions
What is William James Parker, M.D.'s NPI number?
William James Parker, M.D.'s National Provider Identifier (NPI) is 1295778686, issued on Jun 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William James Parker, M.D. located?
The NPPES record lists a practice address at 19016 Stone Oak Pkwy Ste 180, San Antonio, TX, 78258. Phone: (866) 552-4866. Providers update this record themselves, so call before visiting.
How can I verify William James Parker, M.D.'s license?
NPPES lists Texas license number H8309, 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 James Parker, M.D. prescribe under Medicare Part D?
In 2024, William James Parker, M.D. had 17 Medicare Part D claims; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is William James Parker, M.D.'s MIPS final score?
The 2023 MIPS final score is 73 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.