Rene Alberto Castillo, MD
Medical Oncology Physician · Austin, TX
Rene Alberto Castillo, MD is a medical oncology physician with a practice address in Austin, Texas, and NPI 1134186166, issued on Apr 26, 2006. Check the license (Texas M3964, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Rene Alberto Castillo
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- M3964 TX
MD.12610R LA
Self-reported in NPPES; status is on the state search - Practice location
- 4101 James Casey St Ste 100, Austin, TX 78745
- Phone
- (512) 447-2202
- Enumerated
- Apr 26, 2006
- Record last updated
- Feb 10, 2023
- Fax
- (512) 447-5337
- Medicaid IDs
- 182873303 TX
182873302 TX - Medicare enrollment
- Enrolled (PECOS I20061206000020); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 547 in Texas → Look up another NPI →
Also registered at 4101 James Casey St Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Espinoza, FNP-CFamily Nurse Practitioner1710590427
- Ashley Leon, FNPFamily Nurse Practitioner1235687260
- Aimee Mackey, MDSurgical Oncology Physician1386834836
- Shaun McKenzie, MDSurgical Oncology Physician1114189933
- Emily McLeod, MSN, APRN, ACNS-BCAdult Health Nurse Practitioner1053745505
- Susanne Morris, AGCNSClinical Nurse Specialist1003269341
Verify Rene Alberto Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M3964Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average medical oncology physician in 2024
2,608 Medicare Part D claims for 415 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 387 claims were for opioids.
Most prescribed
- Letrozole322 claims
- Hydrocodone-Acetaminophen156 claims
- Tamoxifen Citrate105 claims
- Eliquis103 claims
- Xarelto103 claims
- Gabapentin96 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): 89.4 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: $147.68
7 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- Texas Oncology PAAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rene Alberto Castillo among 547 medical oncology physician records in Texas
Rene Alberto Castillo, MD is one of 547 medical 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 45% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1987 · median 2000 among the 414 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Texas
There are 547 medical oncology physician records in Texas.
All 547 in Texas → Every provider in Austin → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Punit Chadha, MDAustin, TX 787451497778229
- Dina Tebcherany, MDAustin, TX 787451578501664
- Laurence Tokaz, M.D.Austin, TX 787451124060256
- James Uyeki, M.D.Austin, TX 787451124187927
- Sinil Kim, M.D.Austin, TX 787441366781783
- Miguel Albino, MDAustin, TX 787581205060746
- Thomas Aung, M.D.Austin, TX 787581679515530
- Sylvia Jaramillo, MDAustin, TX 787581407089642
Common questions
What is Rene Alberto Castillo, MD's NPI number?
Rene Alberto Castillo, MD's National Provider Identifier (NPI) is 1134186166, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rene Alberto Castillo, MD located?
The NPPES record lists a practice address at 4101 James Casey St Ste 100, Austin, TX, 78745. Phone: (512) 447-2202. Providers update this record themselves, so call before visiting.
How can I verify Rene Alberto Castillo, MD's license?
NPPES lists Texas license number M3964, 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 Rene Alberto Castillo, MD prescribe under Medicare Part D?
In 2024, Rene Alberto Castillo, MD had 2,608 Medicare Part D claims for 415 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Rene Alberto Castillo, MD's MIPS final score?
The 2023 MIPS final score is 89.4 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.