Dr. Aaron John Clark, MD, PhD

Dr. Clark practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.

Dr. Clark's NPI, 1518295815, was assigned on November 24, 2009. Dr. Clark graduated from VCU School of Medicine in 2008. Dr. Clark holds California license A112222.

Dr. Clark's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.

Dr. Clark's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Clark is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is UCSF Medical Group. Dmand AI also links Dr. Clark to 1 more hospital and 2 home health agencies, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices, 5 sites in all. Vendor and product names are available with a free account.

Neurological surgery is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Clark is board certified in neurological surgery by the American Board of Neurological Surgery. Dmand AI has Dr. Clark's licenses on file in 2 states: California and Tennessee.

Dmand AI lists back and neck pain treatment without fusion, lower back pain, muscle pain, fibromyalgia, and limb pain, neck pain and spine problems, spinal fusion and thoracic spine disorders among the conditions Dr. Clark treats.

CMS data shows 1,620 Medicare services from Dr. Clark across 21 procedure codes in 2024, for 447 Medicare patients. Medicare paid $433,955 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 447 Medicare patients who saw Dr. Clark in 2024. The largest group is 65 to 74, with 193 patients. 75% of them have arthritis, and 75% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.41, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 72, with 46% women.

In 2024, Dr. Clark wrote 91 Medicare Part D claims for 39 patients. 100% of them were for generic drugs. CMS names the drug for 67 of them, across 3 drugs with 11 or more claims each, at $1,769 in total drug cost. In 2023, CMS named 195 claims across 9 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Clark for performance year 2024, reported as part of a group. Dr. Clark accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Clark as offering telehealth. CMS counts 588 procedures of spinal fusion by Dr. Clark, more than 99% of the clinicians it reports for that procedure.

Dmand AI links 73 papers to Dr. Clark, published from 2009 to 2025. 2023 was the busiest year, with 7. The most frequent topics are Spinal Fusion, Postoperative Complications and Brain Neoplasms. Dr. Clark has published most often in J Neurosurg Spine. Dr. Clark's most frequent co-authors are Christopher P. Ames, MD, Vedat Deviren, MD and Michael Edward Ivan, MD.

CMS Open Payments shows 760 general payments to Dr. Clark from 20 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 43% of the total. Nuvasive, Inc. paid the most, $131,374.

Dr. Clark graduated from VCU School of Medicine in 2008. Dr. Clark is a member of CNS.

Dr. Clark is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.