Dr. John Joseph Maciejewski, MD

Dr. Maciejewski practices at University Hospital in Ann Arbor, Michigan.

Dr. Maciejewski's NPI, 1235334137, was assigned on June 19, 2007. Dr. Maciejewski graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 2001. Dr. Maciejewski's Michigan license number on file is 4301116418.

Dr. Maciejewski's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.

Dr. Maciejewski's primary practice is University Hospital in Ann Arbor, Michigan. Dr. Maciejewski is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dr. Maciejewski's employer is on file too: a school & student health.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maciejewski practices, 2 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Maciejewski's primary specialty in the NPI Registry, under taxonomy code 207RH0000X. The record also lists hematology. Dr. Maciejewski is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Maciejewski's licenses on file in 2 states: Michigan and Illinois.

Dmand AI lists immune deficiency disease, lymphoma and multiple myeloma among the conditions Dr. Maciejewski treats.

CMS data shows 413 Medicare services from Dr. Maciejewski across 5 procedure codes in 2024, for 66 Medicare patients. Medicare paid $38,098 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 66 Medicare patients who saw Dr. Maciejewski in 2024. The largest group is 65 to 74, with 48 patients. 68% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 2.87, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Maciejewski's median patient age at 64, with 40% women.

In 2024, Dr. Maciejewski wrote 344 Medicare Part D claims for 35 patients. 87% of them were for generic drugs. CMS names the drug for 222 of them, across 10 drugs with 11 or more claims each, at $88,907 in total drug cost. In 2023, CMS named 129 claims across 7 drugs.

Dr. Maciejewski accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Maciejewski as offering telehealth.

Dmand AI links 11 papers to Dr. Maciejewski, published from 2010 to 2025. 2023 was the busiest year, with 3. The most frequent topics are Hematopoietic Stem Cell Transplantation, Graft vs Host Disease and Transplantation, Homologous. Dr. Maciejewski has published most often in Blood Adv. Dr. Maciejewski's most frequent co-authors are Sarah Marie Anand, MD, Monalisa Ghosh, MD and John Martin Magenau, MD.

Dmand AI links Dr. Maciejewski to 2 clinical trials. 1 is still active or recruiting. Conditions studied include Anemia, Aplastic, Anemia, Sickle Cell and Anemia, Hemolytic, Congenital. Center for International Blood and Marrow Transplant Research sponsors the most, 2.

CMS Open Payments shows 2 general payments to Dr. Maciejewski from 2 drug and device companies from 2020 to 2024. Travel and lodging make up the largest share, 82% of the total. CSL Behring paid the most, $1,000.

Dmand AI lists 1 award for Dr. Maciejewski, most recently CMS Stage 1 EHR in 2013.

Dr. Maciejewski graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 2001. Dr. Maciejewski is a member of ASCO.

Dr. Maciejewski is in network with 18 carriers, including Elevance, Health Alliance Plan and Priority Health. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.