Timothy George Call MD

Associate Professor, Internal Medicine, Mayo Medical School

200 1st St SwRochester, MN 55905
Phone+1 507-284-2511

Dr. Call is on Doximity

As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.

Gain access to free telehealth tools, such as our “call shielding” and one-way patient texting.
Connect with colleagues in the same hospital or clinic.
Read the latest clinical news, personalized to your specialty.

See Dr. Call's full profile Already have an account?

Education & Training

Mayo Clinic College of Medicine and Science (Rochester)Fellowship, Hematology and Medical Oncology, 1989 - 1993
Gundersen Lutheran Medical FoundationResidency, Internal Medicine, 1980 - 1983
University of Wisconsin School of Medicine & Public HealthClass of 1980

The following disclaimer is related to board certifications obtained from ABMS®, denoted by the ABMS® logo.

This information is proprietary data maintained in a copyrighted database owned by the American Board of Medical Specialties®. The display and presence of ABMS Data in no way constitutes any affiliation, association with, or endorsement of any advertising, promotion, or sponsorship by ABMS and its affiliates and subsidiaries, the ABMS Member Boards, or ABMS board certified physicians and medical specialists. Copyright 2026 American Board of Medical Specialties®. All rights reserved.

The user is responsible for ensuring that the profile obtained in this directory is the profile of the physician or medical specialist being sought.

A self-designated specialty, subspecialty, or practice area neither implies nor is equivalent to ABMS board certification or the existence of specialized training by or competence of a physician or medical specialist.

Certifications & Licensure

MN State Medical License 1990 - 2027
WI State Medical License 1981 - 2027
American Board of Internal Medicine Internal Medicine
American Board of Internal Medicine Hematology
American Board of Internal Medicine Medical Oncology

Awards, Honors, & Recognition

CMS Meaningful Use Stage 1 Certification Centricity Enterprise (CE), GE Healthcare, 2014-2017
CMS Meaningful Use Stage 1 Certification Centricity Patient Online, GE Healthcare, 2014-2017
CMS Meaningful Use Stage 2 Certification Mayo Clinic Patient Lists, Mayo Clinic, 2014-2017

Clinical Trials

Gemcitabine in Treating Patients With Recurrent Chronic Lymphocytic Leukemia
COMPLETED
PHASE2
Ibrutinib in Treating Patients With Relapsed Hairy Cell Leukemia Start of enrollment: 2013 Apr 30
ACTIVE_NOT_RECRUITING
PHASE2

Publications & Presentations

PubMed

Updated consensus guidelines for the diagnosis and management of patients with HCL and HCL variant.
Clive S Zent, Enrico Tiacci, Robert J Kreitman, Tamar Tadmor, Martin S Tallman
Blood. 2026-07-02
Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma: Mayo Clinic Systematic Management and Risk-Adapted Therapy for Lymphoid Malignancies (lySMART) Consensus Guide...
Sameer A Parikh, Paul J Hampel, Lindsey E Roeker, Yucai Wang, Mazie Tsang
Mayo Clinic Proceedings. 2026-07-01
A pilot study to determine the feasibility and safety of pharmacist and nurse driven management of venetoclax ramp-up in patients with chronic lymphocytic leukemia.
Rachel J Bailen, Monica I Aasum, Linda M Tamminga, Amber B Koehler, Amy L Behnken
Journal of Oncology Pharmacy Practice. 2026-07-01

Journal Articles

Autoimmune Cytopenias in Patients with Chronic Lymphocytic Leukaemia Treated with Ibrutinib in Routine Clinical Practice at an Academic Medical Centre
Sameer A Parikh, Tait D Shanafelt, Paul J Hampel, Jose F Leis, Neil E Kay, Wei Ding, Timothy G Call, Deborah Bowen, Eli Muchtar, British Journal of Haematology

Abstracts/Posters

A Randomized Phase 2 Study Comparing Acalabrutinib with or without Obinutuzumab in the Treatment of Early Stage High Risk Patients with Chronic Lymphocytic Leukemia (C...
Timothy G. Call, 61st Annual American Society of Hematology Meeting, Orlando, FL, 12/9/2019
Tumor Mutational Load and Germline Polygenic Risk Score Predicts Time-to-First Treatment in Chronic Lymphocytic Leukemia (CLL) and High-Count Monoclonal B Cell Lymphoc...
Timothy G. Call, 61st Annual American Society of Hematology Meeting, Orlando, FL, 12/9/2019
BTK and/or PLCG2 Mutations in Patients with Chronic Lymphocytic Leukemia (CLL) Treated with Ibrutinib: Characteristics and Outcomes at the Time of Progression
Timothy G. Call, 61st Annual American Society of Hematology Meeting, Orlando, FL, 12/8/2019

Lectures

Clinical Characteristics and Outcomes of Chronic Lymphocytic Leukemia Patients with Richter Transformation
2018 ASH Annual Meeting - San Diego, CA - 12/1/2018
Clinical Characteristics and Outcomes of Chronic Lymphocytic Leukemia Patients with Richter Transformation
2018 ASH Annual Meeting - San Diego, CA - 12/1/2018