Dr. Thomas Jun Hirai, MD

Dr. Hirai practices at Regional Medical Center in San Jose, California, part of County of Santa Clara, CA.

Dr. Hirai's NPI, 1134231384, was assigned on August 31, 2006. Dr. Hirai graduated from Universidade de Sao Paulo Faculty of Medicine in 1997. Dr. Hirai's California license number on file is A84170.

Dr. Hirai's primary practice is Regional Medical Center, at 225 N Jackson Avenue, San Jose, CA 95116 in Santa Clara County. The practice phone is (408) 259-5000.

Dr. Hirai's primary practice is Regional Medical Center in San Jose, California, part of County of Santa Clara, CA. Dr. Hirai is also affiliated with Santa Clara Valley Medical Center. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Hirai to 1 more hospital, 1 physician office 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. Hirai practices, 5 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Hirai's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Hirai is board certified in obesity medicine by the American Board of Obesity Medicine. Dmand AI has Dr. Hirai's licenses on file in 4 states: California, New York, Washington and Virginia.

Dmand AI lists abdominal hernia repair surgery, acute gallbladder or bile duct inflammation, bariatric surgery, colon removal, gallbladder removal, groin hernia surgery, hemorrhoids and mastectomy among the conditions Dr. Hirai treats.

CMS data shows 125 Medicare services from Dr. Hirai across 2 procedure codes in 2024, all of them office visits, for 93 Medicare patients. Medicare paid $16,212 for them. Every service was in an office.

CMS counts 93 Medicare patients who saw Dr. Hirai in 2024. The largest group is 65 to 74, with 44 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 46% are also on Medicaid. Their average risk score is 1.84, 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. Hirai's median patient age at 62, with 60% women.

In 2024, Dr. Hirai wrote 81 Medicare Part D claims for 68 patients. 98% of them were for generic drugs. CMS names the drug for 61 of them, across 1 drug with 11 or more claims each, at $147 in total drug cost. In 2023, CMS named 52 claims across 1 drug.

Dr. Hirai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

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)

Mastectomy: 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)

CMS Open Payments shows 214 general payments to Dr. Hirai from 27 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 35% of the total. Intuitive Surgical, Inc. paid the most, $23,316.

Dmand AI lists 1 award for Dr. Hirai.

Dr. Hirai graduated from Universidade de Sao Paulo Faculty of Medicine in 1997. Dr. Hirai is a member of ACS.

Dr. Hirai is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.