Dr. Robert Gerald Deiss, MD

Dr. Deiss practices at UCSD Hillcrest Medical Center in San Diego, California.

Dr. Deiss' NPI, 1194977652, was assigned on October 15, 2008. Dr. Deiss graduated from UC San Diego School of Medicine in 2007. Dr. Deiss holds California license A111310.

Dr. Deiss' primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6222.

Dr. Deiss' primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Deiss is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health. Dmand AI also links Dr. Deiss to 1 more group practice or clinic and 1 medical group, each named with a free account.

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

Internal medicine is Dr. Deiss' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Deiss is board certified in infectious disease by the American Board of Internal Medicine. Dr. Deiss is licensed in California.

Dmand AI lists cold sores or genital herpes and hiv/aids among the conditions Dr. Deiss treats.

CMS data shows 171 Medicare services from Dr. Deiss across 5 procedure codes in 2024, for 78 Medicare patients. Medicare paid $15,386 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 78 Medicare patients who saw Dr. Deiss in 2024. The largest group is under 65, with 38 patients. 73% of them have high blood pressure, and 72% have high cholesterol. 74% are also on Medicaid. Their average risk score is 4.10, 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. Deiss' median patient age at 54, with 12% women.

In 2024, Dr. Deiss wrote 2,098 Medicare Part D claims for 138 patients. 67% of them were for generic drugs. CMS names the drug for 1,650 of them, across 56 drugs with 11 or more claims each, at $1,791,926 in total drug cost. In 2023, CMS named 1,604 claims across 53 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Deiss for performance year 2024, reported as part of a group. Dr. Deiss accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Deiss as offering telehealth.

Dmand AI links 45 papers to Dr. Deiss, published from 2009 to 2025. 2016 was the busiest year, with 5. The most frequent topics are HIV Infections, Military Personnel and Anti-HIV Agents. Dr. Deiss has published most often in Clin Infect Dis. Dr. Deiss' most frequent co-authors are Brian K. Agan, MD, Jason Okulicz, MD and Tahaniyat Lalani, MD.

CMS Open Payments shows 57 general payments to Dr. Deiss from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $933.

Dr. Deiss graduated from UC San Diego School of Medicine in 2007.

Dr. Deiss is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.