Dr. Brian Joseph McGuinness, MD

Dr. McGuinness practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.

Dr. McGuinness' NPI, 1891870770, was assigned on October 26, 2006. Dr. McGuinness graduated from Tulane School of Medicine in 1995. Dr. McGuinness holds California license A83195.

Dr. McGuinness' primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.

Dr. McGuinness' primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dr. McGuinness is also affiliated with Concord Medical Center. The medical group on file is BASS Medical Group. Dmand AI also links Dr. McGuinness to 2 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. McGuinness practices, 6 sites in all. Vendor and product names are available with a free account.

Colon and rectal surgery is Dr. McGuinness' primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. McGuinness is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery. Dmand AI has Dr. McGuinness' licenses on file in 2 states: California and Ohio.

Dmand AI lists colonoscopy, colon removal and hemorrhoids among the conditions Dr. McGuinness treats.

CMS data shows 403 Medicare services from Dr. McGuinness across 11 procedure codes in 2024, for 232 Medicare patients. Medicare paid $39,885 for them.

CMS counts 232 Medicare patients who saw Dr. McGuinness in 2024. The largest group is 65 to 74, with 96 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.52, 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. McGuinness' median patient age at 55, with 36% women.

In 2024, Dr. McGuinness wrote 119 Medicare Part D claims for 63 patients. 92% of them were for generic drugs. CMS names the drug for 62 of them, across 5 drugs with 11 or more claims each, at $1,251 in total drug cost. In 2023, CMS named 23 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. McGuinness for performance year 2024, reported as part of a group. CMS counts 54 procedures of colonoscopy by Dr. McGuinness, more than 65% of the clinicians it reports for that procedure.

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

Melanoma (skin cancer) excision: 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)

Dmand AI links 2 papers to Dr. McGuinness in 2002.

CMS Open Payments shows 62 general payments to Dr. McGuinness from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 70% of the total. Intuitive Surgical, Inc. paid the most, $917.

Dmand AI lists 2 awards for Dr. McGuinness, most recently CMS Stage 1 EHR in 2013.

Dr. McGuinness graduated from Tulane School of Medicine in 1995. Dr. McGuinness is a member of ACS.

Dr. McGuinness is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.