Why are Medicare and Medicaid shown separately instead of combined?

They come from two different CMS data sources with no shared claim identifier, so they can't be reconciled into one number without double-counting or guessing. Every table and chart on this page keeps them fully separate.

Why is there no private/commercial revenue figure?

Private and commercial payer data comes from Transparency in Coverage files, which only publish negotiated rates — not claims or utilization volume. Without a volume figure, no revenue number can be computed for any provider from that data.

What does "Rank" mean in the Competitive Analysis & Benchmarks tables?

For a given CPT/HCPCS code, it's this provider's position by claims volume among all providers billing that same code at that geography level (State, National, or Guam for Medicaid) — rank 1 means the highest claims volume for that code.

Why is the Medicaid comparison limited to Guam only?

Medicaid is administered per-state with no single national fee schedule, so a state or national comparison the way Medicare has one isn't available. Guam (this provider's own state) is the only grouping that's conceptually meaningful.

Why are the numbers rounded to the nearest 10?

To avoid implying more precision than the underlying data supports at a single-provider level. Ratios are kept precise since they're a relative comparison, not a volume or dollar figure.

How current is this data?

The Medicare and Medicaid tables are both single current snapshots, not refreshed on a recurring schedule yet.

Eric Spak (NPI 1053525170)

Key Findings

Field	Value
Entity Type	Individual
Organization	Eric Spak
Address	301 Frank H Cushing Way # 3a
City	Tamuning
State	GU
ZIP	96913
Taxonomy	Diagnostic Radiology Physician
NPI Enumerated	May 9, 2007

Payer Source	Total Paid
Medicare	$136K
Medicaid	$0

This provider has generated $136K in lifetime Medicare revenue and shows none (no Medicaid billing on file), making its publicly visible billing effectively single‑payer Medicare in scale. The absence of any Medicaid claims means payer diversification is limited and Medicaid-driven volumes or state‑level market share cannot be assessed from the available data.

Revenue concentration on Medicare is material: the precomputed top 3 Medicare codes by revenue account for 30.1% of this provider's total Medicare revenue, driven by 93925 ($17.3K, 13.2%), 70450 ($11.2K, 8.6%), and 76706 ($10.9K, 8.3%). Those three procedures collectively represent nearly a third of Medicare receipts, indicating a reliance on a small set of imaging/vascular services.

The CPT mix and code descriptions indicate a diagnostic radiology practice with a strong emphasis on vascular ultrasound and cross‑sectional imaging: frequent duplex arterial and venous studies (for example 93925, 93970, 93990, 93985) alongside CT head and CT abdomen/pelvis exams (70450, 74177, 71275). This combination suggests the operation supports both vascular access/stenosis evaluation and general CT imaging throughput rather than being limited to plain radiography.

Competitive standing is mixed by code: the provider is a national high‑volume outlier for abdominal aorta ultrasound 76706 (ranks #71 of 3507 providers nationally (98th percentile; notably above typical national volume for this code)), signalling specialty strength in AAA screening. For many other codes the provider sits at typical national volumes — for example 93925 ranks #1148 of 10098 (88th percentile; typical, unremarkable volume for this code) and 70450 ranks #4071 of 21092 (81th percentile; typical, unremarkable volume for this code) — indicating modest-to-typical market presence across broad radiology services.

Operational utilization shows high claim counts for low‑reimbursement studies: 71045 has 830 claims at $7 avg paid/claim producing $5.8K (4.4% of Medicare revenue), while CT head 70450 has 373 claims at $30 avg paid/claim producing $11.2K (8.6% of Medicare revenue). This pattern points to a mix of high-throughput, low‑paying plain radiographs together with substantial CT and ultrasound throughput that drive revenue disproportionately.

Tenure is long: the NPI was enumerated 2007-05-09 (~19 years ago), indicating an established presence in the Medicare network. That longevity, coupled with the modest overall Medicare revenue, suggests steady, low-to-moderate scale operations rather than a recent, rapidly expanding practice.

There are important code‑level variations that may inform contracting or network decisions: several duplex/hemodialysis access codes (for example 93990 ranks #172 of 1490 (89th percentile; typical, unremarkable volume for this code)) show above‑typical placement within smaller specialty cohorts, while some CTA codes (for example 74174 ranks #7988 of 10220 (17th percentile; typical, unremarkable volume for this code)) sit low in national rank. These rank patterns indicate the provider performs specialty vascular ultrasound at a relatively high level regionally/nationally but remains a modest participant for many CT angiography studies.

Medicare: Complete Services Breakdown

The CPT/HCPCS codes generating the most Medicare revenue for this provider.

43 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
93925	The provider performs a duplex ultrasound scan of the lower extremity arteries or bypass grafts on both sides. Providers perform noninvasive arterial diagnostic procedures to examine the rate of…	110	$160	$17.3K
70450	The provider performed computed tomography, or CT scanning, of the head or brain, without contrast. He performs the procedure to diagnose any brain or intracranial abnormalities.	370	$30	$11.2K
76706	The provider performs an ultrasound (a noninvasive imaging procedure that uses high–frequency sound waves) of the abdominal aorta, the largest artery supplying blood and oxygen to organs and…	90	$120	$10.9K
74177	The provider performs computed tomography of the abdomen and pelvis with contrast material to diagnose the cause of abdominal or pelvic pain or other abnormalities of the internal organs.	160	$60	$9.3K
93970	The provider performs an ultrasound scanning procedure called a duplex scan to characterize the pattern and direction of blood flow in extremity veins (arms or legs). This is a complete, bilateral…	100	$90	$8.9K
93990	The provider assesses the flow of blood through a hemodialysis graft using duplex ultrasound scanning. He performs this procedure to evaluate the condition of the graft.	100	$90	$8.8K
93880	Duplex scanning of arteries for the evaluation of blood flow is a type of non–invasive vascular diagnostic process. A physician can visualize and selectively assess the flow patterns of peripheral…	60	$120	$7.3K
71045	In this diagnostic procedure, the provider performs a single radiological view of the chest. He performs this study for the assessment of conditions affecting the chest, its contents, and nearby…	830	$10	$5.8K
71275	In this procedure, the provider performs a computed tomographic angiography, or CTA imaging of the chest to get detailed images of the blood vessels but not the heart. He performs this study using a…	90	$60	$5.4K
76770	A retroperitoneal ultrasound is a noninvasive procedure used to assess the body parts within the abdomen (i.e.Kidneys, urinary bladder, and aorta). This particular code is used when the ultrasound is…	70	$70	$5.3K

Showing 1–10 of 43

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Thomas Lee	GU	Dentist	$0	$10.9M
Guam Memorial Hospital	GU	General Acute Care Hospital	$0	$3.5M
Rsa - Tumon, LLC	GU	End-Stage Renal Disease (ESRD) Treatment Clinic/Center	$0	$2.9M
Robert Yang	GU	Dentist	$0	$2.4M
Antonio Garcia	GU	Pediatrics Physician	$0	$2.2M
Ma Gladys Linsangan	GU	Pediatrics Physician	$0	$2.2M
Ari Katerelos	GU	Radiation Oncology Physician	$2.1M	$0
Guam X-ray	GU	Vascular & Interventional Radiology Physician	$0	$2.1M
Sarah Clegg	GU	General Practice Dentistry	$0	$1.7M
Peter Kh Go	GU	Surgery Physician	$152.8K	$1.5M

Eric Spak — Billing Profile & Reimbursement Data

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Key Findings

Medicare: Total Revenue Breakdown by CPT/HCPCS Code

Medicare: Complete Services Breakdown

Medicare: Competitive Analysis & Benchmarks

Nearby Providers

Frequently Asked Questions

References

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
93990	2	10	260	$110	$27.3K
93925	3	10	130	$170	$19.2K
93880	3	10	60	$130	$6K
93970	1	10	80	$100	$5.9K
71250	3	10	70	$60	$4.8K
76706	1	10	30	$110	$4.5K
74176	1	10	60	$80	$4.1K
93985	1	10	20	$200	$4.1K
71275	1	10	60	$80	$4K
74177	1	10	30	$70	$4K