Dr. Aussama Khalaf Nassar, MD

Dr. Nassar practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Nassar's NPI, 1326589870, was assigned on March 16, 2017. Dr. Nassar graduated from University of Al-Mustansiriyah College of Medicine in 1995. Dr. Nassar holds California license C148059.

Dr. Nassar's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Dr. Nassar's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Nassar to 1 more hospital and 1 medical group, each named with a free account. Dr. Nassar's employer is on file too: a hospital.

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

Surgery is Dr. Nassar's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Nassar is board certified in surgery by the American Board of Surgery. Dr. Nassar is licensed in California.

Dmand AI lists abdominal adhesion surgery, acute gallbladder or bile duct inflammation, chest trauma, colon removal, gallbladder removal, groin hernia surgery, multiple traumatic injuries and non-surgical back problems among the conditions Dr. Nassar treats.

CMS data shows 458 Medicare services from Dr. Nassar across 5 procedure codes in 2024, for 285 Medicare patients. Medicare paid $36,806 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 285 Medicare patients who saw Dr. Nassar in 2024. The largest group is 75 to 84, with 101 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.69, 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. Nassar's median patient age at 55, with 45% women.

In 2024, Dr. Nassar wrote 28 Medicare Part D claims. 46% of them were for generic drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Nassar for performance year 2024, reported as part of a group. Dr. Nassar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nassar as offering telehealth.

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

Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)

Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 40 papers to Dr. Nassar, published from 2010 to 2025. 2020 was the busiest year, with 9. The most frequent topics are Communication, Internship and Residency and Clinical Competence. Dr. Nassar has published most often in Ann Med Surg (Lond). Dr. Nassar's most frequent co-authors are Lisa Marie Knowlton, MD, MPH, Faiz Tuma, MD and David Alan Spain, MD.

CMS Open Payments shows 43 general payments to Dr. Nassar from 5 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 53% of the total. Intuitive Surgical, Inc. paid the most, $5,566.

Dr. Nassar graduated from University of Al-Mustansiriyah College of Medicine in 1995.

Dr. Nassar is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.