Dr. Nicki Niemann, MD

Dr. Niemann practices at Dignity Health St. Joseph's Hospital and Medical Center in Phoenix, Arizona, part of CommonSpirit Health.

Dr. Niemann's NPI, 1093154072, was assigned on June 23, 2013. Dr. Niemann holds Arizona license 57232.

Dr. Niemann's primary practice is Dignity Health St. Joseph's Hospital and Medical Center, at 350 West Thomas Road, Phoenix, AZ 85013 in Maricopa County. The practice phone is (602) 406-8225.

Dr. Niemann's primary practice is Dignity Health St. Joseph's Hospital and Medical Center in Phoenix, Arizona, part of CommonSpirit Health. Dr. Niemann is also affiliated with Dignity Health, Yavapai Regional Medical Center West. The medical group on file is St. Joseph's Faculty Physicians. Dmand AI also links Dr. Niemann to 2 more hospitals, 2 group practices and clinics, 2 medical groups and 1 home health agency, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Niemann practices, 7 sites in all. Vendor and product names are available with a free account.

Neurology is Dr. Niemann's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. Niemann's licenses on file in 2 states: Arizona and Texas.

CMS data shows 27,545 Medicare services from Dr. Niemann across 19 procedure codes in 2024, for 468 Medicare patients. Medicare paid $218,725 for them.

CMS counts 468 Medicare patients who saw Dr. Niemann in 2024. The largest group is 65 to 74, with 210 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 9% are also on Medicaid. Their average risk score is 1.53, 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. Niemann's median patient age at 69, with 49% women.

In 2024, Dr. Niemann wrote 3,806 Medicare Part D claims for 499 patients. 83% of them were for generic drugs. CMS names the drug for 3,547 of them, across 56 drugs with 11 or more claims each, at $1,756,430 in total drug cost. In 2023, CMS named 3,189 claims across 52 drugs.

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

Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 11 papers to Dr. Niemann, published from 2014 to 2023. 2019 was the busiest year, with 2. The most frequent topics are Tetrabenazine, Vesicular Monoamine Transport Proteins and Deep Brain Stimulation. Dr. Niemann has published most often in Drugs. Dr. Niemann's most frequent co-authors are Joseph Jankovic, MD, Mitra Afshari, MD, MPH and Andrew Joseph Billnitzer, MD.

Dmand AI links Dr. Niemann to 1 clinical trial. Conditions studied include Huntington Disease and Chorea.

CMS Open Payments shows 35 general payments to Dr. Niemann from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 69% of the total. Medtronic USA, Inc. paid the most, $462. It also lists 5 research payments totaling $27,317 in 2025.