Dr. Timothy Scott Johnston, MD

Dr. Johnston practices at Timothy S. Johnston, M.D. in Merced, California.

Dr. Johnston's NPI, 1528097847, was assigned on June 30, 2006. Dr. Johnston graduated from The University of New Mexico School of Medicine in 1985. Dr. Johnston holds California license G58698.

Dr. Johnston's primary practice is Timothy S. Johnston, M.D., at 3349 G St, Merced, CA 95340 in Merced County. The practice phone is (209) 349-8549.

Dr. Johnston's primary practice is Timothy S. Johnston, M.D. in Merced, California. Dr. Johnston is also affiliated with Dignity Health - Mercy Medical Center. The medical group on file is Timothy S. Johnston, MD and Associates. Dmand AI also links Dr. Johnston to 2 more home health agencies, 2 skilled nursing facilities, 1 group practice or clinic and 1 hospice, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnston practices, 7 sites in all. Vendor and product names are available with a free account.

Family medicine is Dr. Johnston's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Johnston is board certified in family medicine by the American Board of Family Medicine. Dr. Johnston is licensed in California.

Dmand AI lists acid reflux, acne, acute gallbladder or bile duct inflammation, acute gastroduodenitis, acute kidney failure, acute mini-stroke (TIA), acute sinusitis and acute skin infection among the conditions Dr. Johnston treats.

CMS data shows 10,812 Medicare services from Dr. Johnston across 42 procedure codes in 2024, for 2,149 Medicare patients. Medicare paid $636,196 for them.

CMS counts 2,149 Medicare patients who saw Dr. Johnston in 2024. The largest group is 65 to 74, with 926 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.20, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Johnston's median patient age at 36, with 64% women.

In 2024, Dr. Johnston wrote 8,152 Medicare Part D claims for 550 patients. 82% of them were for generic drugs. CMS names the drug for 7,388 of them, across 149 drugs with 11 or more claims each, at $524,018 in total drug cost. In 2023, CMS named 8,511 claims across 156 drugs.

Dr. Johnston accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Johnston as offering telehealth. CMS counts 29 procedures of removal of skin lesions by Dr. Johnston, more than 68% of the clinicians it reports for that procedure.

Colonoscopy: 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)

Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 1 paper to Dr. Johnston in 2025.

CMS Open Payments shows 41 general payments to Dr. Johnston from 23 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 89% of the total. Allergan Inc. paid the most, $185.

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

Dr. Johnston graduated from The University of New Mexico School of Medicine in 1985.

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