Dr. David G. Alonso, MD

Dr. Alonso practices at BASS Imaging Center - Walnut Creek in Walnut Creek, California.

Dr. Alonso's NPI, 1467403246, was assigned on May 15, 2006. Dr. Alonso graduated from Lewis Katz School of Medicine in 2003. Dr. Alonso's California license number on file is A112504.

Dr. Alonso's primary practice is BASS Imaging Center - Walnut Creek, at 2637 Shadelands Drive, Walnut Creek, CA 94598. The practice phone is (925) 329-3710.

Dr. Alonso's primary practice is BASS Imaging Center - Walnut Creek in Walnut Creek, California. Dr. Alonso is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is BASS Medical Group. Dmand AI also links Dr. Alonso to 4 more hospitals, 3 group practices and clinics, 2 medical groups, 1 home health agency and 1 hospice, each named with a free account. Dr. Alonso's employer is on file too: a breast imaging center.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Alonso practices, 11 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Alonso's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Alonso is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Alonso's licenses on file in 2 states: California and New Hampshire.

Dmand AI lists acid reflux, acne, acute gastroduodenitis, acute kidney failure, acute sinusitis, acute skin infection, ADHD and alcohol use disorders among the conditions Dr. Alonso treats.

CMS data shows 18,309 Medicare services from Dr. Alonso across 24 procedure codes in 2024, for 1,108 Medicare patients. Medicare paid $899,259 for them. Every service was in an office.

CMS counts 1,108 Medicare patients who saw Dr. Alonso in 2024. The largest group is 65 to 74, with 542 patients. 75% of them have high cholesterol, and 65% have high blood pressure. 4% are also on Medicaid. Their average risk score is 0.96, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Alonso's median patient age at 75, with 61% women.

In 2024, Dr. Alonso wrote 6,031 Medicare Part D claims for 450 patients. 81% of them were for generic drugs. CMS names the drug for 5,162 of them, across 114 drugs with 11 or more claims each, at $780,382 in total drug cost. In 2023, CMS named 4,715 claims across 113 drugs.

Dr. Alonso accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Alonso as offering telehealth. CMS counts 38 procedures of removal of skin lesions by Dr. Alonso, more than 70% of the clinicians it reports for that procedure.

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)

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

Dmand AI links 2 papers to Dr. Alonso, published from 2010 to 2014. Dr. Alonso's most frequent co-author is Adam Howard Jacobi, MD.

CMS Open Payments shows 664 general payments to Dr. Alonso from 54 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $1,314.

Dmand AI lists 1 award for Dr. Alonso, most recently CMS Stage 1 EHR in 2013.

Dr. Alonso graduated from Lewis Katz School of Medicine in 2003. Dr. Alonso is a member of ACP.

Dr. Alonso is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.