Physician

Mark Gerard Byrne, M.D.

According to 2025 Medicare claims, Mark Byrne, M.D. (NPI: 1962411272) practices cardiology in the Santa Cruz-Watsonville, CA market, with the plurality of this provider's patient population coming from Santa Cruz, CA. This provider's primary affiliated billing organization is BRENNAN MEDICAL CORPORATION (NPI: 1619263712; TIN: 26-1960445) and primary practice location at 95076-9998.

Byrne's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 471 traditional Medicare patients, billed 12,468 HCPCS/CPT codes, and received $814,384 in Medicare payments. The top billing code was 93306 (Ultrasound of heart with color-depicted blood flow, rate, direction and valve function). Part D data shows 8,839 prescription claims across 480 beneficiaries totaling $1,142,684 in drug costs, led by Mounjaro (Tirzepatide). DME data shows 257 claims. Open Payments data shows 44 records totaling $1,140. 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 changed little. Concurrently, Part D prescription costs have moved sharply higher in recent years, from $220,050 to $1,142,684. In contrast, DME billing represents a smaller volume and moved up and down with repeated peaks and valleys, starting at $8,953 and ending at $13,023.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	748	10,599	$614,888
2016	630	7,447	$561,534
2017	592	7,896	$579,811
2018	618	8,044	$623,640
2019	631	8,544	$672,200
2020	567	7,475	$572,758
2021	556	8,442	$634,879
2022	523	11,031	$684,999
2023	476	10,200	$715,482
2024	471	12,468	$814,384

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	403	4,147	$220,050
2016	439	5,591	$319,590
2017	501	8,176	$432,254
2018	543	9,263	$531,702
2019	526	9,141	$577,967
2020	501	8,372	$621,519
2021	495	7,799	$663,292
2022	491	8,461	$909,033
2023	475	8,482	$1,099,172
2024	480	8,839	$1,142,684

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	29	186	$6,493
2016	35	253	$8,821
2017	73	481	$20,946
2018	115	585	$17,573
2019	70	468	$18,733
2020	91	693	$37,177
2021	74	547	$25,911
2022	67	546	$23,218
2023	44	299	$16,428
2024	44	257	$11,760

* / # = 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
93306	Ultrasound of heart with color-depicted blood flow, rate, direction and valve function	295	350	$169
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	440	2,438	$103
99212	Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	346	1,060	$46
36415	Insertion of needle into vein for collection of blood sample	352	1,050	$9
85025	Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	286	556	$8

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Mounjaro	Tirzepatide	139	3,980	$142,769
Xarelto	Rivaroxaban	109	6,404	$117,099
Farxiga	Dapagliflozin Propanediol	114	5,774	$103,889
Jardiance	Empagliflozin	68	4,327	$83,676
Eliquis	Apixaban	62	4,035	$72,030

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
A4239	Supply allowance for non-adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service	N	N/R	14	$5,891
E1390	Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate	Y	N/R	33	$2,530
A4409	Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, 4 x 4 inches or smaller, each	N	N/R	16	$1,394
A4253	Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips	N	31	84	$952
E0431	Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing	Y	N/R	31	$421

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	44	$1,140	Mylan Specialty L.P.
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 Mark Gerard Byrne, M.D.?

Tedicare shows public-source Medicare data for Mark Gerard Byrne, M.D. (NPI 1962411272), 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 Mark Gerard Byrne, M.D. have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Mark Gerard Byrne, M.D.?

Mark Gerard Byrne, M.D. is linked to BRENNAN MEDICAL CORPORATION (billing NPI 1619263712) in the available physician profile data.

Does Mark Gerard Byrne, M.D. have Open Payments data?

Mark Gerard Byrne, M.D. has 44 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.