Physician

Aaron Charniak, MD

Hospitalist Baltimore-Columbia-Towson, MD Greater Baltimore Medical Center Inc

According to 2025 Medicare claims, Aaron Charniak, MD (NPI: 1063827350) practices hospitalist in the Baltimore-Columbia-Towson, MD market, with the plurality of this provider's patient population coming from Baltimore, MD. This provider's primary affiliated billing organization is Greater Baltimore Medical Center Inc (NPI: 1275578106; TIN: ).

Charniak's data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 362 traditional Medicare patients, billed 895 HCPCS/CPT codes, and received $70,843 in Medicare payments. Part D data shows 137 prescription claims across 65 beneficiaries totaling $9,603 in drug costs, and DME data shows 19 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	232	261	$36,150
2018	855	958	$158,286
2019	292	408	$51,943
2020	367	823	$73,534
2021	340	943	$69,838
2022	405	988	$68,609
2023	362	895	$70,843

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	14	$94
2015	22	46	$1,820
2016	34	62	$5,746
2017	11	24	$1,013
2018	Not reported for this year	Not reported for this year	Not reported for this year
2019	Not reported for this year	11	$396
2020	50	113	$4,164
2021	80	171	$10,374
2022	83	176	$9,352
2023	65	137	$9,603

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	11	$762
2021	Not reported for this year	Not reported for this year	Not reported for this year
2022	Not reported for this year	24	$827
2023	Not reported for this year	19	$670

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	19	24	$670
Durable medical equipment	Not reported for this year	19	24	$670
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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