Dr. Elena Theodosiou, MD

Dr. Elena Theodosiou, MD

Hematology & Oncology  |  
Female  |  
44 y/o

Contact provider for availability

Dr. Elena Theodosiou, MD is a hematology & oncology doctor who practices in Portsmouth, NH. She is 44 years old and has been practicing for 21 years. Dr. Theodosiou is affiliated with Portsmouth Regional Hospital.

Portsmouth Hematology & Oncology Associates

155 Borthwick Ave Ste 301

Portsmouth, NH 03801
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Accepted insurance

  • Amerigroup (Wellpoint)
  • Anthem
  • CareSource
  • Cigna
  • Community Health Choice
  • Fallon Community Health Plan
  • Harvard Pilgrim Health Care
  • Health Net
  • HealthPlus
  • HealthPlus Amerigroup
  • Horizon Blue Cross Blue Shield of New Jersey
  • Husky Health
  • inHealth
  • INTotal Health

Learn about Dr. Theodosiou

Dr. Theodosiou's Experience

Dr. Theodosiou's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Hematology & Oncology
  • Board certified in Hematology, Internal Medicine and Medical Oncology
  • No sanctions found
  • No board actions found


  • Hematology & Oncology
  • Hematology
  • Internal Medicine
  • Medical Oncology
  • Oncology

Board Certifications

  • Hematology
    Accredited by: American Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Board of Internal Medicine*
  • Medical Oncology
    Accredited by: American Board of Internal Medicine*

Conditions Treated

  • Acute Leukemia
  • Adrenal Gland Cancer
  • All Lymphoma
  • Anal Disorders
  • Anal and Rectal Cancer
  • Anemia
  • Antiphospholipid Syndrome (APS)
  • Autoimmune Diseases
  • Bile Duct Cancer
  • Bladder Cancer
  • Bleeding Disorders
  • Blood Disorders
  • Bone Cancer
  • Bone Disorders
  • Brain Cancer
  • Brain Disorders
  • Brain and Nervous System Cancer (incl. Gliomas, Astrocytoma, Schwannoma, Medulloblastoma, Chordoma)
  • Breast Cancer
  • Breast Diseases
  • Cancer
  • Carcinoma in Situ
  • Chronic Myeloid Leukemia (CML)
  • Coagulation Disorders (incl. Hemophilia)
  • Colorectal Cancer
  • Cryoglobulinemia
  • Deep Vein Thrombosis (DVT)
  • ENT Cancer
  • Esophageal Cancer
  • Esophageal Diseases
  • Gallbladder and Biliary Tract Cancer
  • Gastrointestinal Diseases
  • Gynecologic Cancer
  • Head and Neck Cancer
  • Hemophilia
  • Hemophilia A
  • Hodgkin's Disease
  • Hypercoagulable State
  • Immune Thrombocytopenic Purpura (ITP)
  • Kidney Cancer
  • Laryngeal Cancer
  • Leukocytosis
  • Liver Cancer
  • Lung Cancer
  • Lymphocytosis
  • Lymphoma
  • Lymphoma, Large-Cell
  • Lymphosarcoma
  • Macroglobulinemia (incl. Waldenstrom's )
  • Marginal Zone Lymphoma
  • Mediastinal Tumors, Malignant
  • Melanoma
  • Meningiomas
  • Myelodysplastic Syndromes
  • Myeloma
  • Myeloproliferative Disorders
  • Neuroendocrine Tumors
  • Neutropenia
  • Nodular Lymphoma
  • Non-Hodgkin's Lymphoma
  • Oral Cancer
  • Ovarian Cancer
  • Pancreatic Cancer
  • Pancytopenia
  • Pleural Cancer
  • Polycythemia Rubra Vera
  • Pregnancy-Related Disorders
  • Primary Hypercoagulable State (incl. Factor V Leiden Disease)
  • Prostate Cancer
  • Pulmonary Disease
  • Purpura
  • Reticulosarcoma
  • Secondary Malignancies
  • Skin Cancer
  • Soft Tissue Sarcoma
  • Squamous Cell Carcinoma
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Testicular Cancer
  • Thalassemia
  • Thrombocytosis
  • Thrombosis
  • Tongue Cancer
  • Tonsil Cancer
  • Urinary Disorders
  • Uterine Cancer
  • Uterine Diseases
  • Vascular Disease
  • Venous Embolism and Thrombosis
  • von Willebrand Disease


Read More


  • Bone Marrow Biopsy

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for New Hampshire.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University Of Athens
    Medical School | Graduated 1996
  • St John's Episcopal Hospital
    Internship Hospital | Completed 1998
  • St John's Episcopal Hospital
    Residency Hospital | Completed 2001
  • University Of Illinois At Chicago / College Of Medicine
    Fellowship Hospital | Completed 2004

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Theodosiou has no media or publications listed.

Languages Spoken

  • English
  • Greek

Memberships & Professional Affiliations

Dr. Theodosiou does not have any memberships or affiliations listed. If you are Dr. Theodosiou and would like to add memberships or affiliations, please update your profile.

Dr. Theodosiou's Reviews

Likelihood of recommending Dr. Theodosiou to family and friends
based on 12 total reviews (7 with comments)
Dr. Theodosiou's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    Under 10 minutes
Patient Comments (7)
in Dover, NH |
Dr Theodosiou has been my cancer physician for a year plus and I couldn't be happier with the choice . She's been positively the best !
in Seabrook, NH |
She is leaving this practice but all of them are the same They care about one thing and one thing only the PATIENT great doctors who do whatever is needed to help cure any and all cancers
in South Berwick, ME |
My visit to Dr. Theodoseau was very pleasant. The staff made me feel comfortable and answered all questions I had in a polite fashion. Her nurse was also accommodating. I had concerns and questions and Dr Theodoseau calmly and patiently put my mind at ease and covered everything I needed covered. She suggested I give blood, which they do, right in their office. The test was a very thorough blood work up. I was given the results the very next day! I highly recommend Dr. Theodoseau
in Durham, NH |
I feel quite fortunate to have Dr. Elena Theodosiou as my oncologist. She is thorough and knowledgeable in both her questions for me and her answers to my inquiries; she explains everything clearly, without condescension; she engages me in discussion about my treatments; and she takes care to know me as a person, and not just a patient. I trust her professional expertise implicitly.
Dover, NH |
Dr Theodosiou is treating me for Non Hodgkin's lymphoma ; possibly caused by agent orange exposure in 1968 when I flew as an Air Force Helicopter rescue pilot . After six chemo treatments , I am now in remission and expect to be back to full recovery . The staff at the Hematology and Oncology center have been most professional and supportive . I highly recommend this organization for any one needing their services .
Plymouth, NH |
She was curt, somewhat rude in her tone. She did ask questions and did a lot of blood work. Sent results in a super brief note. Did not return a call requesting information. Apparently too busy? Am following up with a different provider.
in Somersworth, NH |
Dr. Theodosiou is an excellent Oncology doctor.
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Not Accepting New Patients
Dr. Theodosiou accepts 27 insurance carriers
  • Amerigroup (Wellpoint)
  • Anthem
  • CareSource
  • Cigna
    Great West Healthcare-Cigna
  • Community Health Choice
  • Fallon Community Health Plan
  • Harvard Pilgrim Health Care
  • Health Net
  • HealthPlus
  • HealthPlus Amerigroup
  • Horizon Blue Cross Blue Shield of New Jersey
  • Husky Health
  • inHealth
  • INTotal Health
  • Medicaid
  • Midwest Health Plan
  • Molina Healthcare
  • MultiPlan
  • MVP Health Care
  • Peach State Health Plan
  • PHCS
  • Simply Healthcare Plans
  • Staywell (Wellcare)
  • Tricare
  • Tufts Health Plan
    Tufts Health Plans
  • UnitedHealthCare
    United Healthcare
  • Wellcare of Georgia

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Theodosiou has admitting privileges

Portsmouth Regional Hospital
333 Borthwick Ave
Portsmouth, NH 03801
View Hospital Profile

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