Physician

Andrea Naomi Heyn, MD

Family practice Merced, CA Timothy S Johnston MD PC

According to 2025 Medicare claims, Andrea Naomi Heyn, MD (NPI: 1194159319) practices family practice in the Merced, CA market, with the plurality of this provider's patient population coming from Merced, CA. This provider's primary affiliated billing organization is Timothy S Johnston MD PC (NPI: 1407306665; TIN: ).

Heyn's data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 99 traditional Medicare patients, billed 331 HCPCS/CPT codes, and received $19,758 in Medicare payments. Part D data shows 1,432 prescription claims across 96 beneficiaries totaling $285,133 in drug costs, and DME data shows 40 claims. Open Payments data shows 1 records totaling $16.

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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	125	201	$11,419
2015	396	714	$31,432
2016	212	348	$13,069
2017	Not reported for this year	Not reported for this year	Not reported for this year
2018	13	16	$818
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	324	602	$34,867
2022	238	592	$42,995
2023	99	331	$19,758

10-Year Trend of Part D records

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

Year	Patients	Claims	Drug Cost
2014	49	76	$2,265
2015	217	295	$6,570
2016	172	278	$7,541
2017	58	232	$20,274
2018	112	397	$28,951
2019	99	429	$27,590
2020	82	295	$44,141
2021	210	1,606	$207,702
2022	128	1,546	$243,452
2023	96	1,432	$285,133

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	15	15	$1,648
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	24	88	$5,347
2022	16	73	$4,556
2023	11	40	$3,834

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
Durable medical equipment	Not reported for this year	40	53	$3,834
All DME supplier activity	11	42	58	$4,280

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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