Dr. Bryan Dieffenbach, MD

Dr. Dieffenbach practices at Bryan Dieffenbach, Inc. in Long Beach, California.

Dr. Dieffenbach's NPI, 1326466137, was assigned on March 31, 2014. Dr. Dieffenbach graduated from UC San Diego School of Medicine in 2014. Dr. Dieffenbach holds California license A188066.

Dr. Dieffenbach's primary practice is Bryan Dieffenbach, Inc., at 3800 Kilroy Airport Way, Long Beach, CA 90806 in Los Angeles County. The practice phone is (619) 299-2600.

Dr. Dieffenbach's primary practice is Bryan Dieffenbach, Inc. in Long Beach, California. Dr. Dieffenbach is also affiliated with Scripps Mercy Hospital San Diego. The medical group on file is UC San Diego Health. Dmand AI also links Dr. Dieffenbach to 4 more group practices and clinics, 3 medical groups and 1 physician office, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dieffenbach practices, 6 sites in all. Vendor and product names are available with a free account.

Vascular surgery is Dr. Dieffenbach's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Dr. Dieffenbach is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Dieffenbach's licenses on file in 2 states: California and Massachusetts.

CMS data shows 543 Medicare services from Dr. Dieffenbach across 8 procedure codes in 2024, for 138 Medicare patients. Medicare paid $46,007 for them.

CMS counts 138 Medicare patients who saw Dr. Dieffenbach in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 43% are also on Medicaid. Their average risk score is 4.04, 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. Dieffenbach's median patient age at 74, with 35% women.

In 2024, Dr. Dieffenbach wrote 72 Medicare Part D claims for 30 patients. 86% of them were for generic drugs. CMS names the drug for 31 of them, across 2 drugs with 11 or more claims each, at $921 in total drug cost. In 2023, CMS named 16 claims across 1 drug.

Dr. Dieffenbach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 19 procedures of leg revascularization (restoring blood flow) by Dr. Dieffenbach, more than 79% of the clinicians it reports for that procedure.

Spinal fusion: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 20 papers to Dr. Dieffenbach, published from 2016 to 2024. 2019 was the busiest year, with 5. The most frequent topics are Cancer Survivors, Postoperative Complications and Reoperation. Dr. Dieffenbach has published most often in J Vasc Surg. Dr. Dieffenbach's most frequent co-authors are Gregory T. Armstrong, MD, Christopher B. Weldon, MD and Eric Jessen Chow, MD.

CMS Open Payments shows 72 general payments to Dr. Dieffenbach from 15 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 94% of the total. Endologix, Inc. paid the most, $1,422.

Dr. Dieffenbach graduated from UC San Diego School of Medicine in 2014.

Dr. Dieffenbach is in network with 14 carriers, including Aetna, United Healthcare and Elevance. HMO plans come from the most carriers, 8. Check the plan with the practice before a visit.