Physician

Robert Tristian Isom, M.D.

According to 2025 Medicare claims, Robert Isom, M.D. (NPI: 1356428072) practices nephrology in the Salinas, CA market, with the plurality of this provider's patient population coming from Monterey, CA. This provider's primary affiliated billing organization is CENTRAL COAST NEPHROLOGY MEDICAL CORPORATION (NPI: 1366550675; TIN: 770237743) and primary practice location at 93901-4446. Isom is affiliated with the MaineHealth Accountable Care Organization (ACO ID: A1290), participating under the MSSP model.

Isom's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 402 traditional Medicare patients, billed 6,035 HCPCS/CPT codes, and received $153,193 in Medicare payments. The top billing code was 99204 (New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more). Part D data shows 1,509 prescription claims across 233 beneficiaries totaling $242,072 in drug costs, led by Jardiance (Empagliflozin). 2022 DME data shows 150 claims. Open Payments data shows 35 records totaling $854. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has moved sharply higher in recent years, from $64,424 to $153,193. In contrast, Part D prescription costs started with an early spike, then settled into a lower baseline, moving from $65,785 to $242,072. For DME billing, this smaller-volume category started with an early spike, then settled into a lower baseline, moving from $35 to $0.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	301	864	$64,424
2016	322	931	$66,150
2017	321	995	$67,480
2018	282	728	$47,881
2019	289	689	$50,585
2020	240	630	$43,131
2021	185	428	$29,597
2022	207	386	$27,152
2023	164	1,932	$92,704
2024	402	6,035	$153,193

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	77	616	$65,785
2016	88	1,047	$321,506
2017	100	1,135	$320,616
2018	108	818	$90,260
2019	125	1,085	$102,480
2020	123	987	$80,913
2021	99	771	$55,215
2022	86	477	$40,311
2023	77	218	$30,875
2024	233	1,509	$242,072

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	162	859	$43,025
2016	187	1,353	$62,119
2017	194	1,605	$68,780
2018	190	1,721	$87,988
2019	125	1,111	$59,725
2020	74	627	$46,678
2021	N/R	285	$6,229
2022	N/R	150	$2,788
2023	N/R	N/R	N/R
2024	N/R	N/R	N/R

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99204	New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	122	122	$133
76770	Complete ultrasound scan behind abdominal cavity	61	63	$97
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	152	245	$82
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	247	491	$65
36415	Insertion of needle into vein for collection of blood sample	82	128	$9

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Jardiance	Empagliflozin	158	5,960	$110,944
Veltassa	Patiromer Calcium Sorbitex	34	1,080	$32,716
Ozempic	Semaglutide	32	952	$30,518
Lokelma	Sodium Zirconium Cyclosilicate	18	399	$20,404
Kerendia	Finerenone	14	420	$9,101

Top 5 DME services in 2024

No connected or detailed DME service-level records for 2024.

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	35	$854	Fresenius USA Marketing, Inc.
Research Payments	Reported research-related payment or transfer-of-value amount.	0	$0	N/R
Ownership / Investment Interests	Reported value of ownership or investment interests.	0	$0	N/R

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FAQ

What Medicare data is available for Robert Tristian Isom, M.D.?

Tedicare shows public-source Medicare data for Robert Tristian Isom, M.D. (NPI 1356428072), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Robert Tristian Isom, M.D. have ACO affiliation data?

Robert Tristian Isom, M.D. is shown with ACO affiliation data for MaineHealth Accountable Care Organization (MSSP, ACO ID A1290).

What billing organization is linked to Robert Tristian Isom, M.D.?

Robert Tristian Isom, M.D. is linked to CENTRAL COAST NEPHROLOGY MEDICAL CORPORATION (billing NPI 1366550675) in the available physician profile data.

Does Robert Tristian Isom, M.D. have Open Payments data?

Robert Tristian Isom, M.D. has 35 connected Open Payments records in the available 2024 summary data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.