Physician

Alan W Keister, MD

Internal medicine Amarillo, TX Amarillo Medical Specialists,llp

According to 2025 Medicare claims, Alan W. Keister, MD (NPI: 1255373635) practices internal medicine in the Amarillo, TX market, with the plurality of this provider's patient population coming from Potter, TX. This provider's primary affiliated billing organization is Amarillo Medical Specialists,llp (NPI: 1790743524; TIN: ).

Keister's data goes back to 2012 and runs through 2026. For example, in 2023, this provider had 1,114 traditional Medicare patients, billed 32,258 HCPCS/CPT codes, and received $678,664 in Medicare payments. Part D data shows 16,582 prescription claims across 1,209 beneficiaries totaling $1,691,965 in drug costs, and DME data shows 378 claims. Open Payments data shows 107 records totaling $1,732.

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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	882	21,166	$385,000
2015	938	76,346	$441,374
2016	1,035	78,161	$502,022
2017	1,050	91,422	$542,555
2018	1,041	81,876	$528,764
2019	1,111	71,280	$567,340
2020	1,122	51,920	$564,127
2021	1,231	52,950	$664,139
2022	1,137	51,289	$679,321
2023	1,114	32,258	$678,664

10-Year Trend of Part D records

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

Year	Patients	Claims	Drug Cost
2014	753	18,479	$1,177,420
2015	790	17,842	$1,106,207
2016	849	18,576	$1,068,082
2017	960	20,094	$1,223,640
2018	1,050	20,844	$1,338,873
2019	1,137	22,166	$1,477,405
2020	1,182	22,669	$1,600,237
2021	1,223	21,797	$1,675,338
2022	1,246	20,760	$1,568,918
2023	1,209	16,582	$1,691,965

10-Year Trend of DME records

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

Year	Patients	Claims	Medicare Payment
2014	134	503	$40,377
2015	121	474	$39,044
2016	115	592	$27,600
2017	120	461	$18,389
2018	104	409	$15,995
2019	94	398	$17,712
2020	85	322	$17,295
2021	92	348	$35,636
2022	90	377	$36,778
2023	84	378	$54,952

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	84	456	19,917	$83,794
Durable medical equipment	70	378	890	$54,952
DME drugs	Not reported for this year	27	3,193	$383
Prosthetics, orthotics, and supplies	16	28	2,833	$20,105

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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