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

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

Alison Chang (NPI 1205253465)

Field	Value
Entity Type	Individual
Organization	Alison Chang
Address	795 El Camino Real
City	Palo Alto
State	CA
ZIP	94301
Taxonomy	Hematology & Oncology Physician
NPI Enumerated	March 26, 2014

Payer Source	Total Paid
Medicare	$1.8M
Medicaid	$0

Medicare: Complete Services Breakdown

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

44 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
J9271	Injection, pembrolizumab, 1 mg	12,700	$40	$546.1K
J9144	Injection, daratumumab, 10 mg and hyaluronidase‑fihj	7,200	$40	$273.6K
J3380	Injection, vedolizumab, intravenous, 1 mg	11,100	$20	$188.7K
J1459	Injection, immune globulin (privigen), intravenous, non-lyophilized (e.g., liquid), 500 mg	4,380	$40	$162.1K
J3262	Injection, tocilizumab, 1 mg	21,820	$10	$109.1K
99215	The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a high level of medical decision making, and/or the…	400	$170	$67.6K
J1745	Injection, infliximab, excludes biosimilar, 10 mg	2,470	$30	$64.2K
96413	Chemotherapy is a therapeutic procedure used for the treatment of cancer via the use of chemical agents. These chemical agents (drugs) work on the cancerous cells of the body to destroy them. These…	360	$150	$52.1K
Q5119	Injection, rituximab-pvvr, biosimilar, (ruxience), 10 mg	2,140	$20	$49.2K
99214	The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the…	410	$110	$46.4K

Showing 1–10 of 44

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 44 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. California Distribution

Alison Chang — 2 of 25 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — California

Full comparison — all codes billed, vs. state median

44 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
J9271	70	140	13,100	$40	$653.5K
J9144	27	40	13,860	$40	$631.4K
J1459	7	10	5,730	$40	$380.4K
J3262	36	50	29,000	$1	$203.8K
J3380	10	30	9,300	$20	$178.5K
J1602	59	70	11,550	$10	$167.1K
J1745	32	70	2,350	$30	$96.5K
J0897	610	1,030	3,060	$20	$91.4K
Q5119	14	30	1,940	$20	$66.6K
J3490	286	320	80	$190	$49.2K

Showing 1–10 of 44

Related Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Providence Health & Services Washington	WA	Pulmonary Disease Physician	$0	$78.6M
Columbus Radiology Corp	OH	Diagnostic Radiology Physician	$0	$49.9M
Sutter Valley Medical Foundation	CA	Multi-Specialty Clinic/Center	$0	$41.2M
Children's Hospital And Health System, Inc.	WI	Urgent Care Clinic/Center	$0	$17.7M
Thomas Schlesinger	CA	Retina Specialist (Ophthalmology) Physician	$4.3M	$7.9M
Shalini Yalamanchi	CA	Ophthalmology Physician	$4.6M	$7.2M
Stephen Meffert	CA	Retina Specialist (Ophthalmology) Physician	$3.2M	$5.5M
Louis Chang	CA	Ophthalmology Physician	$2.2M	$5.9M
Matthew Powers	CA	Retina Specialist (Ophthalmology) Physician	$3.7M	$4.3M
Ira Schachar	CA	Retina Specialist (Ophthalmology) Physician	$3.9M	$4.1M

Nearby Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Jon Keller	CA	Anatomic Pathology & Clinical Pathology Physician	$6.4M	$0
Sutter Bay Medical Foundation	CA	Ambulatory Surgical Clinic/Center	$3M	$28.6K
Roozbeh Mohajer	CA	Hematology & Oncology Physician	$1.7M	$0
Gurunadh Vemulakonda	CA	Ophthalmology Physician	$1.4M	$0
Greg Morganroth	CA	Dermatology Physician	$1.4M	$0
Waverley Surgery Center LLC	CA	Ambulatory Surgical Clinic/Center	$1.2M	$0
Daniel Schiffner	CA	Radiation Oncology Physician	$1.1M	$0
Nick Costouros	CA	Diagnostic Radiology Physician	$893K	$0
Lisa Chu	CA	Diagnostic Radiology Physician	$854.1K	$0
Robert Lundahl	CA	Radiation Oncology Physician	$809.7K	$0

Alison Chang — Billing Profile & Reimbursement Data

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Alison Chang — Billing Profile & Reimbursement Data

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Medicare: Total Revenue Breakdown by CPT/HCPCS Code

Medicare: Complete Services Breakdown

Medicare: Competitive Analysis & Benchmarks

Related Providers

Nearby Providers

Frequently Asked Questions

References