Physician

Adam John Darby, MD

Neurology Oxnard-Thousand Oaks-Ventura, CA Regents Of The University Of California Los Angeles

According to 2025 Medicare claims, Adam John Darby, MD (NPI: 1376842898) practices neurology in the Oxnard-Thousand Oaks-Ventura, CA market, with the plurality of this provider's patient population coming from Ventura, CA. This provider's primary affiliated billing organization is Regents Of The University Of California Los Angeles (NPI: 1609194497; TIN: ).

Darby's data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 674 traditional Medicare patients, billed 1,514 HCPCS/CPT codes, and received $175,297 in Medicare payments. Part D data shows 2,915 prescription claims across 513 beneficiaries totaling $656,389 in drug costs, and DME data shows 16 claims. No Open Payments records.

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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	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	125	248	$31,731
2018	345	761	$85,931
2019	460	897	$101,643
2020	472	893	$88,000
2021	602	1,233	$138,996
2022	614	1,330	$147,069
2023	674	1,514	$175,297

10-Year Trend of Part D records

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

Year	Patients	Claims	Drug Cost
2014	25	92	$5,490
2015	Not reported for this year	11	$379
2016	Not reported for this year	Not reported for this year	Not reported for this year
2017	25	48	$962
2018	151	544	$68,108
2019	207	1,052	$152,535
2020	268	1,346	$365,528
2021	395	2,447	$651,077
2022	428	2,715	$736,654
2023	513	2,915	$656,389

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	16	$510

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	16	16	$510
Durable medical equipment	Not reported for this year	16	16	$510
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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