Gregory Sean Hadfield, PA-C

Gregory Hadfield practices at Sebastopol Specialty Center & Ambulatory Surgery Center in Sebastopol, California.

Gregory Hadfield's NPI, 1285869966, was assigned on May 24, 2009. Gregory Hadfield holds California license P-16311.

Gregory Hadfield's primary practice is Sebastopol Specialty Center & Ambulatory Surgery Center, at 6880 Palm Avenue, Sebastopol, CA 95472. The practice phone is (707) 823-7628.

Gregory Hadfield's primary practice is Sebastopol Specialty Center & Ambulatory Surgery Center in Sebastopol, California. Gregory Hadfield is also affiliated with Adventist Health Clear Lake. The medical group on file is San Francisco Emergency Medical Associates. Dmand AI also links Gregory Hadfield to 1 more hospital, 2 medical groups 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 Gregory Hadfield practices, 4 sites in all. Vendor and product names are available with a free account.

Physician assistant is Gregory Hadfield's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Gregory Hadfield is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Gregory Hadfield is licensed in California.

Dmand AI lists acne, acute skin infection, ankle or foot injury, benign or precancerous skin growths, cold sores or genital herpes, contact dermatitis, corns and calluses and facial skin infection among the conditions Gregory Hadfield treats.

CMS data shows 17,108 Medicare services from Gregory Hadfield across 40 procedure codes in 2024, for 1,060 Medicare patients. Medicare paid $483,195 for them. Every service was in an office.

CMS counts 1,060 Medicare patients who saw Gregory Hadfield in 2024. The largest group is 75 to 84, with 442 patients. 70% of them have high blood pressure, and 70% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.06, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Gregory Hadfield's median patient age at 72, with 49% women.

In 2024, Gregory Hadfield wrote 2,238 Medicare Part D claims for 599 patients. 94% of them were for generic drugs. CMS names the drug for 2,076 of them, across 32 drugs with 11 or more claims each, at $674,235 in total drug cost.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Gregory Hadfield for performance year 2024, reported as part of a group. Gregory Hadfield accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 25 general payments to Gregory Hadfield from 7 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $328.

Gregory Hadfield is a member of AAPA, California Academy of PAs, NCCPA and Society of Dermatological Physician Assistants (SDPA).