Dr. Alfred B. Johnson, MD

Dr. Johnson practices at Merced Ambulatory Surgery Center, LLC in Merced, California.

Dr. Johnson's NPI, 1174508865, was assigned on December 14, 2005. Dr. Johnson graduated from Georgetown University School Of Medicine in 1987. Dr. Johnson holds California license G88950.

Dr. Johnson's primary practice is Merced Ambulatory Surgery Center, LLC, at 1390 E Yosemite Ave, Merced, CA 95340 in Merced County. The practice phone is (209) 580-3409.

Dr. Johnson's primary practice is Merced Ambulatory Surgery Center, LLC in Merced, California. Dr. Johnson is also affiliated with Dignity Health - Mercy Medical Center. The medical group on file is Tenaya Medical Group. Dmand AI also links Dr. Johnson to 2 more group practices and clinics, 2 medical groups, 1 physician office and 1 skilled nursing facility, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 5 sites in all. Vendor and product names are available with a free account.

Surgery is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Johnson is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Johnson's licenses on file in 7 states: California, Mississippi, Indiana, Michigan, Georgia, New York and Colorado.

Dmand AI lists abdominal adhesion surgery, abdominal hernia repair surgery, appendectomy, colonoscopy, colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal and groin hernia surgery among the conditions Dr. Johnson treats.

CMS data shows 41 Medicare services from Dr. Johnson across 2 procedure codes in 2024, for 31 Medicare patients. Medicare paid $2,309 for them.

CMS counts 31 Medicare patients who saw Dr. Johnson in 2024. The largest group is 65 to 74, with 16 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 65% are also on Medicaid. Their average risk score is 1.22, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 58, with 55% women.

In 2024, Dr. Johnson wrote 56 Medicare Part D claims for 23 patients. 93% of them were for generic drugs. CMS names the drug for 55 of them, across 3 drugs with 11 or more claims each, at $479 in total drug cost. In 2022, CMS named 42 claims across 3 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Johnson for performance year 2024, reported through an alternative payment model (APM). Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 66 procedures of removal of tissue by Dr. Johnson, more than 81% of the clinicians it reports for that procedure.

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)

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

Dmand AI links 2 papers to Dr. Johnson.

CMS Open Payments shows 106 general payments to Dr. Johnson from 12 drug and device companies from 2016 to 2025. Education make up the largest share, 51% of the total. Intuitive Surgical, Inc. paid the most, $18,903.

Dmand AI lists 1 award for Dr. Johnson.

Dr. Johnson graduated from Georgetown University School Of Medicine in 1987. Dr. Johnson is a member of ACS.

Dr. Johnson is in network with 8 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.