Physician

Alec Chang, DO

Psychiatry San Rafael, CA County Of Marin

According to 2025 Medicare claims, Alec Chang, DO (NPI: 1013259415) practices psychiatry in the San Rafael, CA market, with the plurality of this provider's patient population coming from Marin, CA. This provider's primary affiliated billing organization is County Of Marin (NPI: 1568525699; TIN: ).

Chang's data goes back to 2012 and runs through 2026. Part D data shows 49 prescription claims across 16 beneficiaries totaling $4,398 in drug costs. 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.

No connected records

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	40	$4,171
2015	45	261	$10,693
2016	43	415	$13,061
2017	15	48	$2,927
2018	21	40	$1,309
2019	17	29	$2,352
2020	24	50	$2,064
2021	25	84	$5,314
2022	11	23	$881
2023	16	49	$4,398

10-Year Trend of DME records

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

No connected records

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.

No connected DME records for 2023.

Physician Data Export

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

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