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 Virginia for Medicaid) — rank 1 means the highest claims volume for that code.

Why is the Medicaid comparison limited to Virginia 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. Virginia (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.

Gregory Sibley (NPI 1043211360)

Field	Value
Entity Type	Individual
Organization	Gregory Sibley
Address	8613 Route 29 Ste 100n
City	Fairfax
State	VA
ZIP	22031
Taxonomy	Radiation Oncology Physician
NPI Enumerated	August 9, 2005

Payer Source	Total Paid
Medicare	$2.5M
Medicaid	$0

Key Findings

This provider’s Medicare activity is narrowly concentrated: total Medicare revenue is $2.5M and the precomputed top three codes by revenue account for 80.5% of that Medicare revenue. The single largest driver is A9607 (Lutetium lu 177 vipivotide tetraxetan), which alone represents a major share of Medicare dollars and shapes the practice’s service mix toward high-cost radiopharmaceutical therapeutics.

The code mix indicates a specialty radiation oncology operation focused on advanced therapeutic services. High revenue from A9607 together with substantial revenue from treatment delivery codes such as G6015 and advanced planning/delivery codes like 77301 and 77373 suggests the provider delivers radiopharmaceutical therapy plus complex external beam services (IMRT and SBRT-style treatments). This combination is consistent with a practice treating localized cancers with both systemic radiopharmaceuticals and precision radiation techniques.

Revenue concentration is pronounced: A9607 generates $1.7M (67.9% of Medicare revenue) and the top three codes together produce 80.5% of Medicare revenue. That degree of reliance on a small set of high-value services implies the practice’s financial performance is heavily dependent on continued utilization of Lutetium vipivotide tetraxetan and associated high-reimbursement radiation procedures.

Payer mix is effectively single-payer in scope: Medicare revenue is $2.5M while there is no Medicaid billing on file. Analysts should treat this provider as Medicare-dominant for publicly visible claims activity, with no Medicaid volume to inform in-state Medicaid competitive positioning or access patterns.

Competitive standing on national benchmarks is mixed but generally mid-range: A9607 volume ranks #20 of 44 providers nationally (56th percentile) which the data characterizes as typical/unremarkable for that specific code, while G6015 ranks #616 of 1429 providers (57th percentile). Several planning and delivery codes (e.g., 77295 at the 97th percentile and 77290 at the 93th percentile) are described as notably above typical or high-percentile volumes, indicating above-average activity in advanced planning and 3D/IMRT planning relative to peers. Together these ranks suggest the provider is not a dominant national outlier overall but does show pockets of above-typical activity in specific planning/physics services.

Tenure is long: the NPI was enumerated on 2005-08-09 (~21 years ago). This sustained enrollment suggests an established clinical presence over two decades, which supports interpretation of the coding mix as stable practice patterns rather than a short-term or newly pivoted service line.

Several individual codes are statistical outliers relative to national peers and should be noted for operational significance. For example, 77295 is flagged as “notably above typical national volume” (97th percentile) and 77290 is at the 93th percentile; these high percentiles for planning/dose-calculation codes indicate a heavier-than-typical investment in advanced treatment planning and physics support. Conversely, many other high-revenue items (A9607, G6015, 77301, 77373) are described as typical/unremarkable volume, so the practice pairs a high-cost radiopharmaceutical with otherwise standard radiotherapy volumes.

Medicare: Complete Services Breakdown

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

29 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
A9607	Lutetium lu 177 vipivotide tetraxetan, therapeutic, 1 millicurie	8,200	$200	$1.7M
G6015	Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session	640	$350	$222.1K
77301	Intensity modulated radiotherapy (IMRT) uses advanced computer technology to deliver very precise radiation beams that target and destroy the cancerous cells while avoiding the surrounding healthy…	50	$1,740	$88.6K
77373	This code represents the technical component of a procedure in which the provider performs stereotactic body radiation therapy. The therapy uses a three–dimensional coordinate system to locate small…	90	$940	$82.1K
G6012	Radiation treatment delivery, 3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev	270	$220	$59.3K
77427	Radiation therapy utilizes ionizing radiation beams that are directed at cancerous cells in order to destroy them. The radiation, damages the DNA (the genetic material) in the cell, thus preventing…	210	$170	$36K
77290	Before starting radiation therapy, a physician needs to know the location and size of the cancerous tumor, the radiation doses required to treat the tumor, and the positioning of the radiation beams…	80	$420	$34.9K
G6013	Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev	150	$230	$34.3K
77295	Computer–generated radiographic reconstruction and volumetric dose calculation are used to improve accuracy of external beam radiation administration. Documentation may include 3D volume…	80	$430	$32.5K
77334	The provider designs, develops, and constructs special and customized devices for proper radiation dose delivery and protection of nearby healthy tissues.	270	$110	$30.4K

Showing 1–10 of 29

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 29 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. Virginia Distribution

Gregory Sibley — 0 of 25 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — Virginia

Full comparison — all codes billed, vs. state median

29 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
A9607	3	10	8,400	$220	$2M
G6015	12	20	780	$290	$262.7K
77373	7	10	90	$810	$102.4K
G6012	7	10	270	$190	$54K
G6013	10	10	200	$190	$44.4K
77427	57	90	260	$150	$41.1K
77014	55	80	750	$50	$36.9K
77301	41	80	50	$620	$35.3K
77336	14	20	310	$70	$23.2K
99214	9,289	12,890	140	$80	$21K

Showing 1–10 of 29

Related Providers

Other providers that share a Tax Identification Number (TIN) with Gregory Sibley, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Harold Agbahiwe	VA	Radiation Oncology Physician	$2.4M	$0
Mitul Gandhi	VA	Hematology & Oncology Physician	$1.9M	$0
Robert Marsh	VA	Hematology & Oncology Physician	$1.6M	$120
Tejas Suresh	VA	Hematology & Oncology Physician	$1.6M	$0
Samuel Lee	VA	Hematology & Oncology Physician	$1.6M	$0
Geoffrey Moorer	VA	Hematology & Oncology Physician	$1.4M	$670
Alina Huang	VA	Hematology & Oncology Physician	$1.4M	$0
Ajay Dar	VA	Medical Oncology Physician	$1.3M	$0
Jey Maran	VA	Hematology & Oncology Physician	$1.3M	$0
Chao Yin	VA	Hematology & Oncology Physician	$1.2M	$0

Nearby Providers

Other providers in the same ZIP code as Gregory Sibley, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
A Kind & Caring Home Care,llc	VA	Home Health Agency	$0	$35.7M
Alpha Home Care Services LLC	VA	Home Health Agency	$0	$32.2M
Community Living Alternatives, Corp.	VA	Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility	$0	$31M
Gateway Healthcare Services LLC	VA	Home Health Agency	$0	$22.1M
Praise Home Health Services, Inc	VA	Home Health Agency	$0	$22M
Grace Home Healthcare, LLC	VA	Home Health Agency	$0	$20.5M
Aloha Home Healthcare Services,llc	VA	Home Health Agency	$0	$13.1M
Precious Care At Home Services Inc	VA	Home Health Aide	$0	$12.5M
Inova Health Care Services	VA	Clinical Medical Laboratory	$5.4M	$6.8M
Pediatric Specialists Of Virginia, LLC	VA	Pediatrics Physician	$0	$11.3M

Gregory Sibley — 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

Related Providers

Nearby Providers

Frequently Asked Questions

References