Dr. Mark D. Weissig, MD

Dr. Weissig practices at Providence Medical Foundation in Fullerton, California.

Dr. Weissig's NPI, 1649266032, was assigned on September 21, 2005. Dr. Weissig graduated from Duke University School Of Medicine in 1980. Dr. Weissig holds California license G49175.

Dr. Weissig's primary practice is Providence Medical Foundation, at 2141 N Harbor Blvd, Fullerton, CA 92835 in Orange County. The practice phone is (714) 449-4900.

Dr. Weissig's primary practice is Providence Medical Foundation in Fullerton, California. Dr. Weissig is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Weissig to 1 more hospital and 1 group practice or clinic, each named with a free account.

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

Pulmonary disease is Dr. Weissig's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Weissig is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Weissig's licenses on file in 2 states: California and North Carolina.

Dmand AI lists acute sinusitis, asthma, bronchitis, chronic lung disease, chronic obstructive pulmonary disease (COPD), hypersomnia, pleural effusion and pneumonia among the conditions Dr. Weissig treats.

CMS data shows 1,555 Medicare services from Dr. Weissig across 6 procedure codes in 2024, for 529 Medicare patients. Medicare paid $120,048 for them. Every service was in an office.

CMS counts 529 Medicare patients who saw Dr. Weissig in 2024. The largest group is 75 to 84, with 232 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.62, 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. Weissig's median patient age at 74, with 58% women.

In 2024, Dr. Weissig wrote 5,274 Medicare Part D claims for 788 patients. 63% of them were for generic drugs. CMS names the drug for 4,764 of them, across 79 drugs with 11 or more claims each, at $1,656,052 in total drug cost. In 2023, CMS named 4,776 claims across 73 drugs.

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

Dmand AI links 2 papers to Dr. Weissig. The most frequent topics are Length of Stay, Lung Neoplasms and Minimally Invasive Surgical Procedures. Dr. Weissig's most frequent co-authors are Eduardo A. Tovar, MD and Kaye S. Dabbs-Moyer, MD.

CMS Open Payments shows 419 general payments to Dr. Weissig from 22 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. GlaxoSmithKline, LLC. paid the most, $2,948.

Dmand AI lists 2 awards for Dr. Weissig, most recently CMS Stage 1 EHR in 2012.

Dr. Weissig graduated from Duke University School Of Medicine in 1980.

Dr. Weissig is in network with 6 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.