Physician

Karen R Garnaas, MD

According to 2025 Medicare claims, Karen Garnaas, MD (NPI: 1124046776) practices neurology in the Redding, CA market, with the plurality of this provider's patient population coming from Shasta, CA. This provider's primary affiliated billing organization is CATALYST NEUROMEDICAL CENTER PC (NPI: 1558973792; TIN: 85-2163215) and primary practice location at 96001-3033. Garnaas is affiliated with the Avera Prairie View ACO (ACO ID: A4692), participating under the MSSP model.

Garnaas' data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 1,918 traditional Medicare patients, billed 67,385 HCPCS/CPT codes, and received $1,048,910 in Medicare payments. The top billing code was 99205 (New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more). Part D data shows 3,021 prescription claims across 577 beneficiaries totaling $3,239,911 in drug costs, led by Privigen (Immun Glob G(Igg)/Pro/Iga 0-50). DME data shows 253 claims. Open Payments data shows 146 records totaling $13,314. 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 $215,724 to $1,048,910. Similarly, Part D prescription costs have moved sharply higher in recent years, from $1,634,883 to $3,239,911. In contrast, DME billing represents a smaller volume and moved sharply higher in recent years, from $53,205 to $129,318.

Part B Carrier Billing Trend

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

Year	Patients	Clm Lines	Payment
2015	600	15,191	$215,724
2016	581	7,394	$145,791
2017	590	1,369	$107,933
2018	281	767	$40,916
2019	N/R	N/R	N/R
2020	169	843	$62,210
2021	928	19,459	$463,202
2022	1,610	36,839	$756,342
2023	1,785	55,145	$951,930
2024	1,918	67,385	$1,048,910

Part D Events Trend

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

Year	Patients	Claims	Drug Cost
2015	282	2,360	$1,634,883
2016	319	2,427	$1,686,545
2017	293	2,036	$1,591,561
2018	195	1,124	$1,329,466
2019	32	103	$116,912
2020	67	208	$12,636
2021	427	2,163	$595,058
2022	522	2,746	$1,404,409
2023	531	2,693	$3,320,541
2024	577	3,021	$3,239,911

DME Billing Trend

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

Year	Patients	Claims	Payment
2015	N/R	58	$12,605
2016	N/R	135	$34,265
2017	N/R	83	$14,605
2018	N/R	87	$24,170
2019	N/R	30	$3,776
2020	N/R	24	$3,979
2021	N/R	36	$17,357
2022	N/R	63	$20,394
2023	N/R	77	$31,699
2024	N/R	253	$98,965

* / # = 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
99205	New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	378	378	$156
99204	New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	280	280	$110
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	920	1,362	$92
95886	Needle measurement of electrical activity in arm or leg muscles, complete study	440	1,019	$78
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	382	467	$13

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Privigen	Immun Glob G(Igg)/Pro/Iga 0-50	85	2,165	$1,024,150
Gammaplex	Immun Glob G(Igg)/Gly/Iga 0-50	23	670	$509,956
Radicava Ors	Edaravone	21	588	$297,915
Cuvitru	Immun Glob G(Igg)/Gly/Iga Ov50	12	336	$274,329
Gamunex-C	Immune Globul G/Gly/Iga Avg 46	16	316	$235,592

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
E0466	Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell)	Y	N/R	45	$37,541
E0483	High frequency chest wall oscillation system, with full anterior and/or posterior thoracic region receiving simultaneous external oscillation, includes all accessories and supplies, each	Y	N/R	18	$17,059
E0482	Cough stimulating device, alternating positive and negative airway pressure	Y	N/R	42	$15,049
B4153	Enteral formula, nutritionally complete, hydrolyzed proteins (amino acids and peptide chain), includes fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit	N	N/R	15	$13,544
E0465	Home ventilator, any type, used with invasive interface, (e.g., tracheostomy tube)	Y	N/R	12	$10,415

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	146	$13,314	Alexion Pharmaceuticals, 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 R. Garnaas, MD?

Tedicare shows public-source Medicare data for Karen R. Garnaas, MD (NPI 1124046776), 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 R. Garnaas, MD have ACO affiliation data?

Karen R. Garnaas, MD is shown with ACO affiliation data for Avera Prairie View ACO (MSSP, ACO ID A4692).

What billing organization is linked to Karen R. Garnaas, MD?

Karen R. Garnaas, MD is linked to CATALYST NEUROMEDICAL CENTER PC (billing NPI 1558973792) in the available physician profile data.

Does Karen R. Garnaas, MD have Open Payments data?

Karen R. Garnaas, MD has 146 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.