Dr. Janie Gia-Lin Weng Grumley, MD

Dr. Grumley practices at Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services.

Dr. Grumley's NPI, 1063616142, was assigned on June 13, 2007. Dr. Grumley graduated from Keck School of Medicine of USC in 2005. Dr. Grumley holds California license A97413.

Dr. Grumley's primary practice is Providence Saint John's Health Center, at 2121 Santa Monica Blvd, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 829-5511.

Dr. Grumley's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. The medical group on file is Saint John's Physician Partners. Dmand AI also links Dr. Grumley to 1 more medical group, named with a free account.

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

Surgery is Dr. Grumley's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Grumley is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Grumley's licenses on file in 2 states: California and Washington.

Dmand AI lists breast surgery and mastectomy among the conditions Dr. Grumley treats.

CMS data shows 656 Medicare services from Dr. Grumley across 12 procedure codes in 2024, for 266 Medicare patients. Medicare paid $101,384 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 266 Medicare patients who saw Dr. Grumley in 2024. The largest group is 65 to 74, with 139 patients. 75% of them have cancer, and 75% have high cholesterol. Their average risk score is 0.82, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Grumley's median patient age at 70, with 97% women.

In 2024, Dr. Grumley wrote 18 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $52 in total drug cost. In 2016, CMS named 15 claims across 1 drug.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Grumley for performance year 2024, reported as part of a group. Dr. Grumley accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 154 procedures of mastectomy by Dr. Grumley, more than 99% of the clinicians it reports for that procedure.

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links Dr. Grumley to 2 clinical trials. 2 are still active or recruiting. Conditions studied include Breast Neoplasms, Carcinoma, Intraductal, Noninfiltrating and Breast Carcinoma In Situ.

CMS Open Payments shows 58 general payments to Dr. Grumley from 16 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 64% of the total. Endomagnetics Ltd paid the most, $2,365.

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

Dr. Grumley graduated from Keck School of Medicine of USC in 2005. Dr. Grumley is a member of ACS, ASBS and SSO.

Dr. Grumley is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.