Dr. Maxwell Johannes Diddams, MD

Dr. Diddams practices at UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System.

Dr. Diddams' NPI, 1740716000, was assigned on May 5, 2017. Dr. Diddams holds North Carolina license 2021-00610.

Dr. Diddams' primary practice is UNC Hospitals, at 101 Manning Drive, Chapel Hill, NC 27514 in Orange County. The practice phone is (919) 966-4141.

Dr. Diddams' primary practice is UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System. Dr. Diddams is also affiliated with Atrium Health Carolinas Medical Center. The medical group on file is Atrium Health Cleveland Imaging. Dmand AI also links Dr. Diddams to 2 more hospitals, 2 group practices and clinics, 2 medical groups and 1 therapy and rehab clinic, each named with a free account.

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

Pulmonary disease is Dr. Diddams' primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Diddams is licensed in North Carolina.

CMS data shows 148 Medicare services from Dr. Diddams across 7 procedure codes in 2024, for 138 Medicare patients. Medicare paid $12,791 for them.

CMS counts 138 Medicare patients who saw Dr. Diddams in 2024. The largest group is 65 to 74, with 65 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.37, 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. Diddams' median patient age at 73, with 57% women.

In 2024, Dr. Diddams wrote 140 Medicare Part D claims for 54 patients. 45% of them were for generic drugs. CMS names the drug for 54 of them, across 3 drugs with 11 or more claims each, at $15,588 in total drug cost. In 2023, CMS named 151 claims across 8 drugs.

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

Dmand AI links 3 papers to Dr. Diddams, published from 2020 to 2023. 2023 was the busiest year, with 2. The most frequent topics are Ultrasonography. Dr. Diddams' most frequent co-authors are Christina Renee Macrosty, DO and Shalini Mehta, MD.

CMS Open Payments shows 20 general payments to Dr. Diddams from 7 drug and device companies from 2022 to 2025. Education make up the largest share, 65% of the total. Intuitive Surgical, Inc. paid the most, $5,556.