Physician

Karen E Zagar, M.D.

According to 2025 Medicare claims, Karen Zagar, M.D. (NPI: 1902889587) practices rheumatology in the St. Petersburg-Clearwater-Largo, FL market, with the plurality of this provider's patient population coming from Pinellas, FL. This provider's primary affiliated billing organization is ARTHRITIS CENTER INC (NPI: 1730259201; TIN: 59-1925619) and primary practice location at 34684-3176.

Zagar's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 346 traditional Medicare patients, billed 116,213 HCPCS/CPT codes, and received $1,389,250 in Medicare payments. The top billing code was 99215 (Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more). Part D data shows 2,080 prescription claims across 311 beneficiaries totaling $1,580,954 in drug costs, led by Humira(Cf) Pen (Adalimumab). DME data shows 13 claims. Open Payments data shows 172 records totaling $4,475. 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 from a lower plateau to a higher plateau, from $692,907 to $1,389,250. Similarly, Part D prescription costs have moved from a lower plateau to a higher plateau, from $744,029 to $1,580,954. In contrast, DME billing represents a smaller volume and did not follow a clear longitudinal pattern.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	444	54,024	$692,907
2016	401	59,021	$784,912
2017	407	55,334	$1,006,532
2018	499	66,617	$1,277,178
2019	495	87,985	$1,429,939
2020	564	126,142	$1,972,849
2021	461	126,679	$1,765,618
2022	456	147,549	$1,670,138
2023	426	129,778	$1,517,510
2024	346	116,213	$1,389,250

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	317	2,446	$744,029
2016	321	2,298	$714,430
2017	344	2,425	$896,435
2018	370	2,386	$894,851
2019	381	2,500	$1,074,399
2020	386	2,867	$1,292,124
2021	390	2,634	$1,524,745
2022	361	2,561	$2,541,415
2023	332	2,260	$1,743,226
2024	311	2,080	$1,580,954

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	N/R	N/R
2016	N/R	N/R	N/R
2017	N/R	N/R	N/R
2018	N/R	N/R	N/R
2019	N/R	N/R	N/R
2020	N/R	12	$914
2021	N/R	18	$1,170
2022	N/R	N/R	N/R
2023	N/R	12	$1,005
2024	N/R	13	$916

* / # = 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
99215	Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	117	165	$136
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	310	667	$90
96401	Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle	162	621	$51
J0897	Injection, denosumab, 1 mg	145	15,000	$21
G2211	Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	311	609	$13

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Humira(Cf) Pen	Adalimumab	13	364	$170,629
Enbrel	Etanercept	22	616	$163,463
Rinvoq	Upadacitinib	14	780	$133,321
Cosentyx Sensoready (2 Pens)	Secukinumab	17	476	$126,809
Prolia	Denosumab	71	12,678	$123,246

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
E0745	Neuromuscular stimulator, electronic shock unit	Y	N/R	13	$916

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	172	$4,475	ABBVIE 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 Karen E. Zagar, M.D.?

Tedicare shows public-source Medicare data for Karen E. Zagar, M.D. (NPI 1902889587), 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 Karen E. Zagar, 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 Karen E. Zagar, M.D.?

Karen E. Zagar, M.D. is linked to ARTHRITIS CENTER INC (billing NPI 1730259201) in the available physician profile data.

Does Karen E. Zagar, M.D. have Open Payments data?

Karen E. Zagar, M.D. has 172 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.