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Dr. Rena Callahan, MD

Medical Oncology* Age 49
Dr. Rena Callahan, MD
4.2 (21 Ratings)

Offers telehealth

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Dr. Rena Callahan, MD is a Medical Oncology Specialist in Valencia, CA.
Dr. Rena Callahan, MD
4.2 (21 Ratings)
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Dr. Rena Callahan, MD

Medical Oncology* Age 49
Valencia, CA
Accepting new patients
20 years of experience

Offers telehealth

Dr. Rena Callahan, MD is a Medical Oncology Specialist in Valencia, CA.

About

Dr. Rena Callahan, MD is a Medical Oncology Specialist in Valencia, CA and has 20 years experience. They graduated from University of Pennsylvania Perelman School of Medicine in 2004 and completed a residency at UCLA.They currently practice at California Neurosurgical Institute and are affiliated with Ronald Reagan UCLA Medical Center, UCLA Santa Monica Medical Center and Henry Mayo Newhall Hospital. Dr. Callahan has experience treating conditions like Breast Lump and Breast Cancer among other conditions at varying frequencies. At present, Dr. Callahan received an average rating of 4.2/5 from patients and has been reviewed 21 times. Their office accepts new patients and telehealth appointments. Dr. Callahan is board certified in Oncology and accepts multiple insurance plans.

Offers Telehealth

This provider offers telehealth appointments. Call the office to schedule.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

Experience Check

Enter a condition or procedure
Breast Lump
Breast Cancer
Bone Cancer
Breast Lump
Breast Cancer
Bone Cancer
Acquired Hemolytic Anemia
Anemia
  • View other providers who treat Anemia
Brain Cancer
Breast Carcinoma
Cholangiocarcinoma
Cutaneous T-Cell Lymphoma
Deep Vein Thrombosis (DVT)
Ductal Carcinoma in Situ
Hemochromatosis
Hypogammaglobulinemia
Leukocytopenia
Liver Cancer
Lung Cancer
Male Breast Carcinoma
Metastatic Respiratory System Cancer
Mycosis Fungoides
Non-Hodgkin's Lymphoma
Ovarian Cancer
Polycythemia Rubra Vera
Prostate Cancer
Retroperitoneum Cancer
Thyroid Cancer
Venous Embolism and Thrombosis
Vitamin B Deficiency
Acute Leukemia
Amyloidosis
Anal and Rectal Cancer
Benign Lung Neoplasms
Bleeding Disorders
Cancer of Cerebral Meninges
Chordoma
  • View other providers who treat Chordoma
Chronic Lymphocytic Leukemia
Coagulation Disorders
Colorectal Cancer
Diffuse Large B-Cell Lymphoma
Endocrine Gland Cancer
Esophageal Cancer
Ewing's Sarcoma
Follicular Lymphoma Grade 1
Gallbladder and Biliary Tract Cancer
Gallbladder Cancer
Gynecologic Cancer
Head and Neck Cancer
Hemophilia
Hypercoagulable State
Hypothalamus Cancer
Immune Thrombocytopenic Purpura (ITP)
Kidney Cancer
Laryngeal Cancer
Leukocytosis
Lobular Carcinoma
Lymphoma
  • View other providers who treat Lymphoma
Lymphoma, Large-Cell
Lymphosarcoma
Male Breast Cancer
Malignant Pleura Secondary
Marginal Zone Lymphoma
Melanoma
  • View other providers who treat Melanoma
Myelodysplastic Syndromes
Myeloma
  • View other providers who treat Myeloma
Myeloproliferative Disorders
Neuroendocrine Tumors
Neutropenia
Oral Cancer
Osteosarcoma
Pancreatic Cancer
Pancytopenia
Peritoneal Cancer
Pleural Cancer
Primary Central Nervous System Lymphoma
Primary Hypercoagulable State
Purpura
  • View other providers who treat Purpura
Reticulosarcoma
Secondary Hypertension
Secondary Malignancies
Sickle Cell Disease
Sickle Cell Hemoglobin SS Disease
Skin Cancer
Small Intestine Cancer
Soft Tissue Sarcoma
Stomach and Small Intestine Cancer
Stomach Cancer
Thalassemia
Thrombocytosis
Tongue Cancer
Upper Digestive Tract Cancer
Uterine Cancer
Anemia and Iron Deficiency Screening
Biopsy of Breast
Bone Marrow Biopsy
Cancer Screening
Erythropoietin Test
Liver Biopsy
Oral Cancer Screening
Skin Screenings

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Choice Plus POS II
  • Balanced (Prudent Buyer)-CA PPO
    UC Resident and Fellows-CA PPO
  • Open Access
  • Blue Card PPO
  • Blue Cross Blue Shield of California PPO
    Select PPO
  • HealthyBlue 2.0
  • Open Access Plus
  • First Health (Coventry Health Care) PPO
  • Large Group PPO
  • MultiPlan PPO
    PHCS Network PPO
  • Options PPO

Locations

  1. 1 Uc Regents Ucla Dmpg Santa Clarita
    23929 McBean Pkwy Ste 215, Valencia, CA 91355
  2. 2 Limited To Official Government Duties On
    2020 Santa Monica Blvd Ste 580, Santa Monica, CA 90404
  3. 3 Office
    Ucla 100 Mp # 550, Los Angeles, CA 90095

Patient Satisfaction

Likelihood to recommend Dr. Callahan
4.2
Based on 21 Reviews
5 Stars (17)
4 Stars (0)
3 Stars (0)
2 Stars (0)
1 Star (4)

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How likely are you to recommend Dr. Callahan?

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Patient Reviews
Apr 04, 2022
Dr. Callahan saved my life. She's so easy to talk to and just so smart and kind. I'm so fortunate to have her in my life. My family loves her as well. The UCLA team is amazing too. World class research and patient care.
LD — Apr 04, 2022
See more reviews on Healthgrades
Photo: Dr. Rena Callahan, MD
How would you rate your experience with Dr. Rena Callahan, MD?
  • Likelihood of recommending Dr. Callahan to family and friends

Dr. Callahan's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Callahan

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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Telehealth Options
This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Callahan, or would you like to choose another provider and have an online appointment right now?
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Call now to make an appointment
(310) 829-5471

About Me

Specialties*
Medical Oncology
Hematology
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • University of Pennsylvania Perelman School of Medicine
    2004
Medical Education

Board Certifications

Board Certifications
  • Oncology
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Residency

Residency Hospital
  • UCLA
Residency Hospital

Fellowship

Fellowship Hospital
  • University of California At Los Angeles
Fellowship Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Callahan communicate via email?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Callahan offer telehealth services or virtual visits?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Callahan offer an online patient portal?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Callahan have free onsite parking?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Callahan offer weekend visits?
No users said yes.
Yes
(0)
No
(2)
Does Dr. Callahan offer evening visits?
No users said yes.
Yes
(0)
No
(2)
Does Dr. Callahan specialize in working with children or adolescents?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Callahan specialize in working with seniors?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Callahan specialize in couples therapy?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Callahan specialize in working with LGBTQ+ community?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Callahan accept insurance?
No responses yet.
Yes
(0)
No
(0)

Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Rena Callahan, MD. To arrange an appointment, call the number on Dr. Callahan's profile.

Dr. Callahan frequently treats the following conditions: Breast Lump and Breast Cancer. See more on Sharecare.

Dr. Rena Callahan, MD is affiliated with Ronald Reagan UCLA Medical Center, UCLA Santa Monica Medical Center and Henry Mayo Newhall Hospital.

Yes, Dr. Rena Callahan, MD holds board certification in Oncology.

Hospital Affiliations

  • Ronald Reagan UCLA Medical Center

    757 Westwood Plz, Los Angeles, CA

  • UCLA Santa Monica Medical Center

    1250 16th St, Santa Monica, CA

  • Henry Mayo Newhall Hospital

    23845 McBean Pkwy, Valencia, CA