Dr. Ajay Kumar Upadhyay, MD

Dr. Upadhyay practices at Bay Area Surgical Specialist Services in Walnut Creek, California.

Dr. Upadhyay's NPI, 1104888155, was assigned on April 5, 2006. Dr. Upadhyay graduated from Maulana Azad Medical College in 1978. Dr. Upadhyay's California license number on file is A53488.

Dr. Upadhyay's primary practice is Bay Area Surgical Specialist Services, at 460 N Wiget Ln, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (202) 815-3665.

Dr. Upadhyay's primary practice is Bay Area Surgical Specialist Services in Walnut Creek, California. Dr. Upadhyay is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. The medical group on file is BASS Medical Group. Dmand AI also links Dr. Upadhyay to 3 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.

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

Surgery is Dr. Upadhyay's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Upadhyay is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Upadhyay's licenses on file in 2 states: California and Missouri.

Dmand AI lists abdominal hernia repair surgery, acute gallbladder or bile duct inflammation, bariatric surgery, colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal, groin hernia surgery and hemorrhoids among the conditions Dr. Upadhyay treats.

CMS data shows 304 Medicare services from Dr. Upadhyay across 8 procedure codes in 2024, for 238 Medicare patients. Medicare paid $35,365 for them.

CMS counts 238 Medicare patients who saw Dr. Upadhyay in 2024. The largest group is 65 to 74, with 97 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 66% are also on Medicaid. Their average risk score is 1.80, 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. Upadhyay's median patient age at 51, with 71% women.

In 2024, Dr. Upadhyay wrote 74 Medicare Part D claims for 28 patients. 99% of them were for generic drugs. CMS names the drug for 40 of them, across 1 drug with 11 or more claims each, at $310 in total drug cost. In 2023, CMS named 22 claims across 1 drug.

Dr. Upadhyay accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 27 procedures of hernia repair (minimally invasive) by Dr. Upadhyay, more than 94% of the clinicians it reports for that procedure.

Colonoscopy: 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)

Dmand AI links 2 papers to Dr. Upadhyay in 2018. 2018 was the busiest year, with 2.

CMS Open Payments shows 124 general payments to Dr. Upadhyay from 25 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 74% of the total. Intuitive Surgical, Inc. paid the most, $2,712.

Dmand AI lists 2 awards for Dr. Upadhyay, most recently CMS Stage 1 EHR in 2011.

Dr. Upadhyay graduated from Maulana Azad Medical College in 1978.

Dr. Upadhyay 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, 8. Check the plan with the practice before a visit.