Dr. David J. Irwin, MD

Dr. Irwin practices at Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania, part of University of Pennsylvania.

Dr. Irwin's NPI, 1194986356, was assigned on June 20, 2008. Dr. Irwin holds Pennsylvania license MD439211.

Dr. Irwin's primary practice is Hospital of the University of Pennsylvania, at 3400 Spruce St, Philadelphia, PA 19104 in Philadelphia County. The practice phone is (215) 662-6289.

Dr. Irwin's primary practice is Hospital of the University of Pennsylvania in Philadelphia, Pennsylvania, part of University of Pennsylvania. Dr. Irwin is also affiliated with Pennsylvania Hospital. The medical group on file is Penn Medicine Lancaster General Health. Dmand AI also links Dr. Irwin to 1 more hospital, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Irwin practices, 3 sites in all. Vendor and product names are available with a free account.

Neurology is Dr. Irwin's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Irwin is licensed in Pennsylvania.

CMS data shows 177 Medicare services from Dr. Irwin across 5 procedure codes in 2024, for 172 Medicare patients. Medicare paid $14,146 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 172 Medicare patients who saw Dr. Irwin in 2024. The largest group is 65 to 74, with 86 patients. 75% of them have high cholesterol, and 65% have alzheimer's and dementia. 10% are also on Medicaid. Their average risk score is 1.52, 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. Irwin's median patient age at 70, with 48% women.

In 2024, Dr. Irwin wrote 1,030 Medicare Part D claims for 186 patients. 97% of them were for generic drugs. CMS names the drug for 919 of them, across 17 drugs with 11 or more claims each, at $21,016 in total drug cost. In 2023, CMS named 1,044 claims across 16 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Irwin for performance year 2024, reported as part of a group. Dr. Irwin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Dmand AI links 186 papers to Dr. Irwin, published from 2013 to 2025. 2024 was the busiest year, with 28. The most frequent topics are Alzheimer Disease, tau Proteins and Frontotemporal Dementia. Dr. Irwin has published most often in Alzheimers Dement. Dr. Irwin's most frequent co-authors are David Wolk, MD, Daniel Weintraub, MD and Bradley F. Boeve, MD.