Dr. Randall S. Williams, MD

Dr. Williams practices at Mangrove Medical Group in Chico, California.

Dr. Williams' NPI, 1245261114, was assigned on July 6, 2006. Dr. Williams graduated from Loma Linda University School Of Medicine in 1986. Dr. Williams' California license number on file is G068885.

Dr. Williams' primary practice is Mangrove Medical Group, at 1040 Mangrove Ave, Chico, CA 95926 in Butte County. The practice phone is (530) 345-0064.

Dr. Williams' primary practice is Mangrove Medical Group in Chico, California. Dr. Williams is also affiliated with Enloe Health. The medical group on file is Mangrove Medical Group. Dmand AI also links Dr. Williams to 1 more hospital, 4 home health agencies 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. Williams practices, 7 sites in all. Vendor and product names are available with a free account.

General practice is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dmand AI has Dr. Williams' licenses on file in 2 states: California and Michigan.

Dmand AI lists acid reflux, acute gastroduodenitis, acute kidney failure, acute mini-stroke (TIA), acute sinusitis, acute skin infection, ADHD and alzheimer's disease among the conditions Dr. Williams treats.

CMS data shows 71,586 Medicare services from Dr. Williams across 106 procedure codes in 2024, for 1,534 Medicare patients. Medicare paid $1,337,725 for them. Every service was in an office.

CMS counts 1,534 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 726 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 6% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 72, with 51% women.

In 2024, Dr. Williams wrote 19,906 Medicare Part D claims for 1,449 patients. 84% of them were for generic drugs. CMS names the drug for 19,084 of them, across 190 drugs with 11 or more claims each, at $1,953,133 in total drug cost. In 2023, CMS named 17,495 claims across 190 drugs.

Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Williams as offering telehealth. CMS counts 137 procedures of colonoscopy by Dr. Williams, more than 87% 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 nail 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)

CMS Open Payments shows 3,315 general payments to Dr. Williams from 97 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 92% of the total. Amgen Inc. paid the most, $7,576.

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

Dr. Williams graduated from Loma Linda University School Of Medicine in 1986.

Dr. Williams is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.