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

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

Han-chih Chang (NPI 1790776755)

Field	Value
Entity Type	Individual
Organization	Han-chih Chang
Address	3601 The Vanderbilt Clinic
City	Nashville
State	TN
ZIP	37232
Taxonomy	Radiation Oncology Physician
NPI Enumerated	October 31, 2005

Payer Source	Total Paid
Medicare	$2.6M
Medicaid	$0

Key Findings

This provider’s lifetime Medicare revenue is $2.6M and there is no Medicaid billing on file, so the practice is effectively single‑payer (Medicare) in scale and exposure. The absence of any Medicaid codes suggests limited participation in state Medicaid programs or that Medicaid services are billed under a different NPI or entity.

Revenue is highly concentrated: the precomputed top 3 Medicare codes account for 74.4% of the provider’s Medicare revenue, and a single code, 77523, alone represents 65.6% of Medicare revenue. That concentration indicates the firm’s financial profile is driven almost entirely by a narrow set of high‑value radiation therapy procedures.

The code mix points to a specialized radiation oncology operation centered on advanced external beam modalities: 77523 (proton beam technical component) dominates volume, supported by high utilization of localization and planning services such as G6002 and 77427. Complementary codes with strong representation — including 77295, 77334, G6015 and 77336 — further indicate in‑house 3D planning, custom device construction, and physics support consistent with a center offering complex, technology‑intensive radiation therapy.

On competitive standing for key services the provider ranks among national leaders: 77523 is #2 of 111 (99th percentile; extreme outlier), G6002 is #9 of 2280 (100th percentile; extreme outlier), and 77427 is #58 of 4720 (99th percentile; extreme outlier). These rank/percentile positions characterize the provider as a major national volume outlier for proton delivery and stereoscopic localization relative to peers, rather than a modest regional participant.

Multiple planning and physics codes are also extreme or notable outliers, underscoring robust ancillary service capacity: 77295 ranks #13 of 3008 (100th percentile; extreme outlier), 77334 ranks #10 of 4463 (100th percentile; extreme outlier), and 77336 ranks #40 of 1488 (97th percentile; notably above typical national volume). This pattern suggests the practice performs a high volume of complex dosimetry, device construction, and ongoing physics consultation in support of its treatment throughput.

Some clinically distinct procedures with high per‑claim payments appear but contribute modestly to revenue, for example 55874 (needle insertion of biodegradable material) shows 37 claims with $2026 avg paid/claim and $75K revenue and ranks #87 of 557 (84th percentile; typical, unremarkable volume). These items reflect complementary services (e.g., prostate spacer placement) that support specific treatment pathways but are not primary revenue drivers.

Given the heavy reliance on a single modality code (77523 at 65.6% of Medicare revenue), the provider’s revenue profile is sensitive to changes in utilization or reimbursement for that modality and could be materially affected by shifts in payer policy or referral patterns for proton therapy. Coupled with no Medicaid billing, this creates payer concentration risk that contracting and network teams should flag for negotiation and coverage planning.

The provider’s NPI was enumerated 2005-10-31 (~21 years ago), indicating a long tenure in the Medicare program; that longevity supports the interpretation that the observed high volumes for advanced radiation services reflect an established practice model rather than a brief anomalous billing period.

Medicare: Complete Services Breakdown

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

39 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
77523	This code represents the technical component of a procedure in which the provider administers radiation therapy using a beam of protons to irradiate the cancer. The treatment performed is…	2,500	$690	$1.7M
G6002	Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy	2,380	$50	$125.9K
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…	740	$140	$105.2K
77334	The provider designs, develops, and constructs special and customized devices for proper radiation dose delivery and protection of nearby healthy tissues.	1,040	$90	$93.8K
G6015	Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session	340	$250	$84.8K
55874	Under imaging guidance, the provider inserts a needle through the perineum, the area between the anus and the scrotum, and injects one or more biodegradable materials, i.e., material that decomposes…	40	$2,030	$75K
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…	160	$320	$50.9K
77295	Computer–generated radiographic reconstruction and volumetric dose calculation are used to improve accuracy of external beam radiation administration. Documentation may include 3D volume…	140	$340	$48.6K
77336	This code is for reporting ongoing medical physics consultation. When a patient is undergoing radiation treatment for a particular span of time with a number of therapy sessions every week, the…	800	$60	$48.1K
77014	N/A	380	$90	$32.6K

Showing 1–10 of 39

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 39 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. Tennessee Distribution

Han-chih Chang — 10 of 25 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — Tennessee

Full comparison — all codes billed, vs. state median

39 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
77523	2	10	2,050	$830	$1.7M
G6015	16	20	530	$260	$171K
55874	5	10	30	$1,760	$65.2K
77373	8	10	50	$720	$41.5K
77014	61	80	710	$50	$40.3K
77427	4	100	200	$140	$33.9K
77280	15	80	40	$160	$25.5K
77067	247	460	160	$60	$18.6K
99214	5,044	11,370	120	$80	$16.6K
77336	2	30	220	$60	$15.2K

Showing 1–10 of 39

Related Providers

Other providers that share a Tax Identification Number (TIN) with Han-chih Chang, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Warren Clinic Inc	OK	General Practice Physician	$0	$40.2M
Saint Francis Hospital Muskogee Inc	OK	General Acute Care Hospital	$0	$16.8M
Matthew Comstock	OK	Interventional Cardiology Physician	$2.8M	$0
Ryan Grover	TN	Radiation Oncology Physician	$2.2M	$0
Mark Mclaughlin	OK	Radiation Oncology Physician	$2M	$0
Brion Shin	TN	Radiation Oncology Physician	$1.5M	$0
Hassan Abouhouli	OK	Pulmonary Disease Physician	$1.4M	$0
Allen Meek	TN	Radiation Oncology Physician	$1.4M	$0
Chase Escott	TN	Radiation Oncology Physician	$1.3M	$0
Mindy Ewert	OK	Physician Assistant	$1.1M	$0

Nearby Providers

Other providers in the same ZIP code as Han-chih Chang, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Vanderbilt University Medical Center	TN	Internal Medicine Physician	$0	$189.5M
Vanderbilt University Medical Center	TN	General Acute Care Hospital	$0	$137.7M
Vanderbilt University Medical Center	TN	Mental Health Clinic/Center (Including Community Mental Health Center)	$0	$29.1M
Antonia Kolokythas	TN	Oral and Maxillofacial Surgery (Dentist)	$0	$5.9M
Vanderbilt Integrated Providers, LLC	TN	Family Medicine Physician	$0	$4.3M
Emily Carpenter	TN	Nurse Practitioner	$747.9K	$0
Kenneth Niermann	TN	Radiation Oncology Physician	$625.8K	$0
Stephen Kim	TN	Ophthalmology Physician	$608.9K	$0
Corbin Johnson	TN	Radiation Oncology Physician	$577.1K	$0
Avni Finn	TN	Ophthalmology Physician	$504.5K	$0

Han-chih Chang — 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