Physician

Aaron John Clark, MD

Neurosurgery San Francisco-San Mateo-Redwood City, CA Ucsf Medical Group Business Services

According to 2025 Medicare claims, Aaron John Clark, MD (NPI: 1518295815) practices neurosurgery in the San Francisco-San Mateo-Redwood City, CA market, with the plurality of this provider's patient population coming from San Francisco, CA. This provider's primary affiliated billing organization is Ucsf Medical Group Business Services (NPI: 1477624104; TIN: ).

Clark's data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 475 traditional Medicare patients, billed 1,841 HCPCS/CPT codes, and received $596,800 in Medicare payments. Part D data shows 255 prescription claims across 58 beneficiaries totaling $16,410 in drug costs, and DME data shows 12 claims. Open Payments data shows 47 records totaling $41,123.

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10-Year Trend of Part B billing

Medicare payment trend, with patients and services in the table.

Year	Patients	Services	Medicare Payment
2014	Not reported for this year	Not reported for this year	Not reported for this year
2015	151	350	$100,534
2016	413	1,168	$386,854
2017	243	943	$341,931
2018	191	941	$405,748
2019	214	906	$400,186
2020	237	990	$394,206
2021	247	1,338	$512,846
2022	507	1,837	$591,170
2023	475	1,841	$596,800

10-Year Trend of Part D records

Prescription claims trend, with patients and drug cost in the table.

Year	Patients	Claims	Drug Cost
2014	Not reported for this year	25	$394
2015	13	33	$1,488
2016	49	153	$4,659
2017	47	160	$4,709
2018	52	129	$4,317
2019	71	155	$6,730
2020	60	203	$15,089
2021	67	221	$13,672
2022	67	252	$20,692
2023	58	255	$16,410

10-Year Trend of DME records

DME claim records trend, with patients and payment in the table.

Year	Patients	Claims	Medicare Payment
2014	Not reported for this year	Not reported for this year	Not reported for this year
2015	Not reported for this year	Not reported for this year	Not reported for this year
2016	Not reported for this year	Not reported for this year	Not reported for this year
2017	Not reported for this year	Not reported for this year	Not reported for this year
2018	Not reported for this year	Not reported for this year	Not reported for this year
2019	Not reported for this year	Not reported for this year	Not reported for this year
2020	Not reported for this year	Not reported for this year	Not reported for this year
2021	Not reported for this year	Not reported for this year	Not reported for this year
2022	Not reported for this year	Not reported for this year	Not reported for this year
2023	Not reported for this year	12	$722

Top 5 Part B billing codes in 2023

By N of patients.

No connected Part B code-level records for 2023.

Top 5 Part D drugs in 2023

By N of patients.

No connected Part D drug-level records for 2023.

Top 5 DME in 2023

By N of patients.

DME	Patients	Claims	Services	Medicare Payment
All DME supplier activity	Not reported for this year	12	12	$722
Durable medical equipment	Not reported for this year	12	12	$722
Prosthetics, orthotics, and supplies	Not reported for this year	0	0	$0
DME drugs	Not reported for this year	0	0	$0

DME category summary is shown when item-level DME rows are not connected.

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Part B billing, Part D prescribing, DME records, yearly summaries, source JSON, and source notes.

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