John Michael Sladic, MD
Internal Medicine Physician · San Antonio, TX
John Michael Sladic, MD is an internal medicine physician with a practice address in San Antonio, Texas, and NPI 1073132452, issued on Apr 15, 2020. Check the license (Texas U3021, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Michael Sladic
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- U3021 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4502 Medical Dr, San Antonio, TX 78229
- Phone
- (210) 358-3555
- Enumerated
- Apr 15, 2020
- Record last updated
- Apr 19, 2023
- Fax
- (210) 702-4239
- Medicare enrollment
- Enrolled (PECOS I20230428000241); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 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 John Michael Sladic in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license U3021Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
245 Medicare Part D claims for 92 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 20 claims were for opioids.
Most prescribed
- Pantoprazole Sodium17 claims
- Amlodipine Besylate12 claims
- Hydrocodone-Acetaminophen12 claims
- Atorvastatin Calcium11 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.
Industry payments in 2024: $109.38
1 payment: food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Usacs Integrated Acute Care Services OF Texas, PLLCKerrville, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Michael Sladic among 9,175 internal medicine physician records in Texas
John Michael Sladic, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 85% of them.
- NPI issued2020 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2020 · median 2004 among the 6,088 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
657 internal medicine physician records list a practice address in San Antonio
They are 657 of the 37,749 NPPES records with a practice address in San Antonio, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in San Antonio → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeremias Abueme, M.D.San Antonio, TX 782291891790960
- Richard Clemons, MDSan Antonio, TX 782291740282664
- Serina Flores, M.D.San Antonio, TX 782291528058203
- John Galan, MDSan Antonio, TX 782291528069440
- Juan Gonzalez, MDSan Antonio, TX 782291659370963
- Bradley Kayser, MDSan Antonio, TX 782291285635110
- Michelle Medellin, M.D.San Antonio, TX 782291770571614
- Thomas Mieras, MDSan Antonio, TX 782291578564787
Common questions
What is John Michael Sladic, MD's NPI number?
John Michael Sladic, MD's National Provider Identifier (NPI) is 1073132452, issued on Apr 15, 2020. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Sladic, MD located?
The NPPES record lists a practice address at 4502 Medical Dr, San Antonio, TX, 78229. Phone: (210) 358-3555. Providers update this record themselves, so call before visiting.
How can I verify John Michael Sladic, MD's license?
NPPES lists Texas license number U3021, 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 John Michael Sladic, MD prescribe under Medicare Part D?
In 2024, John Michael Sladic, MD had 245 Medicare Part D claims for 92 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.