Dr. Gregory A. Robertson, MD

Dr. Robertson practices at Primex Clinical Laboratories in Vannuys, California.

Dr. Robertson's NPI, 1932281011, was assigned on October 19, 2006. Dr. Robertson graduated from Loyola University Chicago Stritch School of Medicine in 1982. Dr. Robertson holds California license G50555.

Dr. Robertson's primary practice is Primex Clinical Laboratories, at 16742 Stagg St, Ste 120, Vannuys, CA 91406. The practice phone is (818) 779-0496.

Dr. Robertson's primary practice is Primex Clinical Laboratories in Vannuys, California. Dr. Robertson is also affiliated with Hoag Hospital Newport Beach. The medical group on file is ProMedix Direct. Dmand AI also links Dr. Robertson to 2 more group practices and clinics, 2 home health agencies, 1 physician office and 1 medical group, each named with a free account.

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

Internal medicine is Dr. Robertson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Robertson is board certified in internal medicine by the American Board of Internal Medicine. Dr. Robertson is licensed in California.

Dmand AI lists acid reflux, acute skin infection, arthritis, atrial fibrillation and flutter, benign or precancerous skin growths, bladder disease, broken or dislocated ankle/ or foot and chronic anemia among the conditions Dr. Robertson treats.

CMS data shows 3,762 Medicare services from Dr. Robertson across 37 procedure codes in 2024, for 247 Medicare patients. Medicare paid $173,450 for them. Every service was in an office.

CMS counts 247 Medicare patients who saw Dr. Robertson in 2024. The largest group is 75 to 84, with 100 patients. 75% of them have high blood pressure, and 69% have high cholesterol. Their average risk score is 1.07, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Robertson's median patient age at 73, with 41% women.

In 2024, Dr. Robertson wrote 4,777 Medicare Part D claims for 233 patients. 80% of them were for generic drugs. CMS names the drug for 4,077 of them, across 102 drugs with 11 or more claims each, at $725,991 in total drug cost. In 2023, CMS named 4,091 claims across 106 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Robertson for performance year 2024, reported individually. Dr. Robertson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Robertson as offering telehealth. CMS counts 44 procedures of removal of skin lesions by Dr. Robertson, more than 71% of the clinicians it reports for that procedure.

Melanoma (skin cancer) excision: 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 2 papers to Dr. Robertson in 2025. Dr. Robertson's most frequent co-author is Joshua T. Tieman, MD.

CMS Open Payments shows 1,594 general payments to Dr. Robertson from 70 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 90% of the total. Pharming Healthcare, Inc. paid the most, $6,409.

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

Dr. Robertson graduated from Loyola University Chicago Stritch School of Medicine in 1982.

Dr. Robertson is in network with 12 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.