Physician

Alejandro S Casillas, MD

Emergency medicine Santa Rosa-Petaluma, CA Permanente Medical Group Inc

According to 2025 Medicare claims, Alejandro S. Casillas, MD (NPI: 1376707919) practices emergency medicine in the Santa Rosa-Petaluma, CA market, with the plurality of this provider's patient population coming from Sonoma, CA. This provider's primary affiliated billing organization is Permanente Medical Group Inc (NPI: 1548343510; TIN: ).

Casillas' data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 29 traditional Medicare patients, billed 31 HCPCS/CPT codes, and received $1,736 in Medicare payments. Part D data shows 375 prescription claims across 232 beneficiaries totaling $6,454 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.

Year	Patients	Services	Medicare Payment
2014	532	859	$75,157
2015	524	854	$72,787
2016	212	312	$26,378
2017	34	36	$2,016
2018	35	35	$1,629
2019	26	28	$1,968
2020	28	30	$2,118
2021	32	34	$2,212
2022	19	20	$1,767
2023	29	31	$1,736

10-Year Trend of Part D records

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

Year	Patients	Claims	Drug Cost
2014	141	233	$4,266
2015	143	246	$3,653
2016	180	284	$6,306
2017	219	352	$8,110
2018	218	347	$7,590
2019	229	385	$7,394
2020	194	288	$4,960
2021	229	391	$11,914
2022	202	329	$7,576
2023	232	375	$6,454

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.

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

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