Dr. Matthew Greg Lefferman, DO

Dr. Lefferman practices at J M Geiss DO APC in Orange, California.

Dr. Lefferman's NPI, 1184622417, was assigned on July 11, 2005. Dr. Lefferman graduated from Arizona College of Osteopathic Medicine - Glendale in 2001. Dr. Lefferman holds California license 20A8857.

Dr. Lefferman's primary practice is J M Geiss DO APC, at 2592 N Santiago Blvd, Orange, CA 92867 in Orange County. The practice phone is (855) 434-7763.

Dr. Lefferman's primary practice is J M Geiss DO APC in Orange, California. Dr. Lefferman is also affiliated with Cedars-Sinai Medical Center. The medical group on file is PIH Health Physicians (John M. Geiss, DO). Dmand AI also links Dr. Lefferman to 5 more home health agencies, 5 hospices, 4 group practices and clinics, 3 medical groups, 2 skilled nursing facilities and 1 physician office, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lefferman practices, 18 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Lefferman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Lefferman's licenses on file in 3 states: California, Arizona and Pennsylvania.

Dmand AI lists acid reflux, acute gastroduodenitis, acute mini-stroke (TIA), acute sinusitis, acute skin infection, ADHD, adjustment disease and alcohol use disorders among the conditions Dr. Lefferman treats.

CMS data shows 39,784 Medicare services from Dr. Lefferman across 39 procedure codes in 2024, for 1,209 Medicare patients. Medicare paid $2,781,089 for them. Every service was in an office.

CMS counts 1,209 Medicare patients who saw Dr. Lefferman in 2024. The largest group is 85 and over, with 669 patients. 75% of them have alzheimer's and dementia, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 2.25, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Lefferman's median patient age at 86, with 66% women.

In 2024, Dr. Lefferman wrote 45,367 Medicare Part D claims for 1,088 patients. 90% of them were for generic drugs. CMS names the drug for 44,381 of them, across 295 drugs with 11 or more claims each, at $2,321,202 in total drug cost. In 2023, CMS named 31,219 claims across 282 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Lefferman for performance year 2024, reported individually. Dr. Lefferman accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lefferman as offering telehealth.

CMS Open Payments shows 12 general payments to Dr. Lefferman from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $94.

Dr. Lefferman graduated from Arizona College of Osteopathic Medicine - Glendale in 2001.

Dr. Lefferman is in network with 2 carriers, including Blue Cross Blue Shield of Michigan and CMS Medicare. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.