Physician Profile
Rene A. Castillo, MD
Unclaimed ProfileAbout Dr. Castillo
Rene A. Castillo, MD practices medical oncology in Austin, TX. Rene is also listed as specializing in hematology & oncology. According to Medicare claims data, Rene cared for 4,389 Medicare patients across 225,178 services. The services billed most often include injection, iron sucrose, 1 mg, injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use), and injection, pembrolizumab, 1 mg.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (512) 447-2202
- Email not available
Practice Locations
4101 JAMES CASEY ST STE 100
Austin, TX 78745
Conditions Commonly Evaluated or Treated
Within Medical Oncology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Anemia
- Blood clots
- Breast cancer
- Colon cancer
- Iron-deficiency anemia
- Leukemia
- Lung cancer
- Lymphoma
- Prostate cancer
Abdominal cancer
- Peritoneal Cancer
Blood cancer
- Blood Cancer
Blood disorders
Cancer complications
Chest cancer
Complications
- Abdominal fluid swelling from cancer
- Fluid around lungs from cancer
Digestive cancer
Digestive cancers
Endocrine cancer
Endocrine cancers
Eye cancer
General oncology
Genetic risk
- Inherited Cancer Risk
Gynecologic cancer
Gynecologic cancers
Head and neck
Head and neck cancer
- Head and neck cancer
- Oral cavity cancer
- Salivary Gland Cancer
Metastatic cancer
Metastatic disease
- Cancer spread to bones
- Cancer that spread to brain
- Cancer that spread to liver
Neurologic cancers
Sarcomas
Skin cancer
Symptom evaluation
- Cancer pain
- Cancer-related fatigue
- Swollen Lymph Nodes
Thoracic cancers
Treatment side effects
- Chemo Rash
- Mouth Sores From Chemo
- Nerve Pain From Chemo
Urologic cancer
Urologic cancers
Procedures & services
Most searched procedures
Cancer treatment care
- Immunotherapy Side Effect Management
- Maintenance Cancer Therapy
Complication management
- Cancer Blood Clot Treatment
Consultations
- Cancer survivorship care
- Integrative oncology consultation
- Post-cancer surveillance scan review
- Pre-Surgery Chemotherapy Consultation
- Preventative Chemotherapy Consultation
- Radiopharmaceutical therapy consultation
- Second Opinion For Cancer
- Stem cell transplant consultation
- Tumor Board Case Review
Diagnostic testing
Diagnostics
- Bone Marrow Biopsy
- Cancer Genetic Testing
- Pathology second opinion for cancer
- Tumor Biomarker Testing
Infusions
- Bone Strengthening Infusion
- Iron Infusion
- IV hydration for cancer patients
- Neurologic infusion treatment
Injections
Medication management
- Oral cancer medication monitoring
Patient education
- Chemo Teaching And Education
Port and line care
Procedures
Specialized treatments
- Bladder instillation therapy
- Heated Chemotherapy Consultation
- Hepatic Artery Pump Chemotherapy Consultation
Specialty treatments
- Bone Strengthening Injections For Cancer
- CAR-T Therapy
- Chemo allergy desensitization
- Clinical Trial Screening
- Hormone Therapy For Cancer
- Spinal chemo injection
Supportive care
- Advance Care Planning For Cancer
- Cancer nutrition counseling
- Cancer pain management
- Cancer Rehabilitation Evaluation
- Cancer weight loss management
- Chemo brain treatment
- Chemo nausea treatment
- Cold cap therapy for hair loss
- Fertility Preservation for Teens Before Cancer Treatment
- Hospice care consultation
- Lymphedema evaluation
- Palliative cancer care
Treatment side effects
- Chemo Rash Treatment
Vascular access
- Chemo port flush and care
- Chemo port placement
- PICC line care and flush
Procedures Most Often Billed to Medicare
225,178 services · 4,389 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
1,655 | More often than most peers in Medical Oncology |
| Injection, iron sucrose, 1 mg | Drug given | J1756 |
69,700 | More than most peers in Medical Oncology |
| Injection, pembrolizumab, 1 mg | Drug given | J9271 |
22,400 | More often than most peers in Medical Oncology |
| Injection, darbepoetin alfa, 1 microgram (non-esrd use) | Drug given | J0881 |
10,895 | As often as other peers in Medical Oncology |
| Injection, oxaliplatin, 0.5 mg | Drug given | J9263 |
10,500 | As often as other peers in Medical Oncology |
| Injection, fosaprepitant, 1 mg | Drug given | J1453 |
9,750 | More often than most peers in Medical Oncology |
| Injection, daratumumab, 10 mg and hyaluronidase-fihj | Drug given | J9144 |
9,180 | As often as other peers in Medical Oncology |
| Injection, denosumab, 1 mg | Drug given | J0897 |
7,680 | More often than most peers in Medical Oncology |
| Injection, paclitaxel, 1 mg | Drug given | J9267 |
4,146 | Less often than most peers in Medical Oncology |
| Injection, dexamethasone sodium phosphate, 1 mg | Drug given | J1100 |
2,008 | More often than most peers in Medical Oncology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other oncologists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other oncologists in Austin 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in TX who bill this service to Medicare most often.
- Quest Diagnostics Clinical Laboratories INC
- Clinical Pathology Laboratories, INC.
- Quest Diagnostics Clinical Laboratories INC
- Laboratory Corporation of America
- Laboratory Corporation of America
- Lone Star Pathology PLLC
- Medical Clinic of Houston, LLP
- The University of Texas Southwestern Medical Center at Dallas
Common questions
What does Dr. Castillo specialize in?
Dr. Castillo is an oncologist in Austin, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Medical Oncology”.
NPI registry
Where is Dr. Castillo located?
Dr. Castillo is listed at 4101 James Casey St Ste 100, Austin, TX 78745. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Castillo's phone number?
The number on file is (512) 447-2202. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Castillo's NPI number?
Dr. Castillo's National Provider Identifier is 1134186166. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Castillo go to medical school?
Dr. Castillo attended Other, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Castillo been practicing?
Dr. Castillo has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Castillo do most often?
According to Medicare billing data, Dr. Castillo performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Castillo confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Castillo. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.