Sylvia Zubyk, M. D.
Radiation Oncology Physician · San Antonio, TX
Sylvia Zubyk, M. D. is a radiation oncology physician with a practice address in San Antonio, Texas, and NPI 1972500197, issued on Jul 1, 2005. Check the license (Texas L5631, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sylvia Zubyk
- Credential
- M. D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- L5631 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4383 Medical Dr, San Antonio, TX 78229
- Phone
- (210) 593-5700
- Enumerated
- Jul 1, 2005
- Record last updated
- Jul 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (210) 593-5992
- Medicaid ID
- 159173705 TX
- Medicare enrollment
- Enrolled (PECOS I20041008000880); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1997
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 449 in Texas → Look up another NPI →
Also registered at 4383 Medical Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Divya Asti, M.B.B.SHematology & Oncology Physician1821475138
- Muralidhar Beeram, M.D.Medical Oncology Physician1265426282
- Megan Brito, FNP-BCNurse Practitioner1700508504
- Neil ChevliRadiation Oncology Physician1376048975
- Sara Conde, MDMedical Oncology Physician1093809428
- Jeanne Contreras, FNPFamily Nurse Practitioner1467752212
Verify Sylvia Zubyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L5631Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average radiation oncology physician in 2024
51 Medicare Part D claims for 21 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Montelukast Sodium11 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): 72.9 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: $49.56
2 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,275 providers of this specialty with any payment received $1,897.85 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
- South Texas Oncology And Hematology, PLLCSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sylvia Zubyk among 449 radiation oncology physician records in Texas
Sylvia Zubyk, M. D. is one of 449 radiation oncology physician records with a practice address in Texas. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1997 · median 2004 among the 348 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Texas
There are 449 radiation oncology physician records in Texas.
All 449 in Texas → Every provider in San Antonio → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ardow Ameduri, M.D.San Antonio, TX 782291861412348
- Mark Bonnen, M.D.San Antonio, TX 782291215962287
- Keith Eyre, M.D.San Antonio, TX 782291841223351
- Mohamad Fakhreddine, M.D.San Antonio, TX 782291790128783
- Eva Galvan, M.D.San Antonio, TX 782291275910390
- Chul Ha, M.D.San Antonio, TX 782291891894705
- William Jones, MDSan Antonio, TX 782291952583148
- Gary Lewis, MDSan Antonio, TX 782291831509330
Common questions
What is Sylvia Zubyk, M. D.'s NPI number?
Sylvia Zubyk, M. D.'s National Provider Identifier (NPI) is 1972500197, issued on Jul 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sylvia Zubyk, M. D. located?
The NPPES record lists a practice address at 4383 Medical Dr, San Antonio, TX, 78229. Phone: (210) 593-5700. Providers update this record themselves, so call before visiting.
How can I verify Sylvia Zubyk, M. D.'s license?
NPPES lists Texas license number L5631, 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 Sylvia Zubyk, M. D. prescribe under Medicare Part D?
In 2024, Sylvia Zubyk, M. D. had 51 Medicare Part D claims for 21 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Sylvia Zubyk, M. D.'s MIPS final score?
The 2023 MIPS final score is 72.9 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.