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 District of Columbia for Medicaid) — rank 1 means the highest claims volume for that code.

Why is the Medicaid comparison limited to District of Columbia 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. District of Columbia (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.

Lisa Ziliak (NPI 1831243484)

Field	Value
Entity Type	Individual
Organization	Lisa Ziliak
Address	6900 Georgia Ave Nw
City	Washington
State	DC
ZIP	20307
Taxonomy	Optometrist
NPI Enumerated	January 22, 2007

Payer Source	Total Paid
Medicaid	$778.9K
Medicare	$0

Medicaid: Complete Services Breakdown

Every CPT/HCPCS code this provider has billed to Medicaid, with claims volume, average payment, and total revenue.

10 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
92004	The provider performs a comprehensive level ophthalmological evaluation of a new patient and initiates a diagnostic and treatment program for one or more visits.	5,180	$50	$233.1K
92340	Code 92340 describes the fitting of eyeglasses, except for aphakia (absence of the crystalline lens as after cataract surgery); monofocal	5,070	$30	$147K
92015	The provider determines the process of determining if a patient's vision is less than 20/20 and by what amount so that corrective lenses or contact lenses can be prescribed and produced.	8,600	$20	$146.2K
92014	An ophthalmologist sees an established patient for a comprehensive level eye examination. Generally, a patient is considered to be "established" if the same physician, or any physician in the group…	2,310	$40	$99.5K
S0620	Routine ophthalmological examination including refraction; new patient	1,280	$40	$56.3K
92012	For this CPT code, an Ophthalmologist sees an established patient for an intermediate level eye examination. Generally, a patient is considered to be "established" if the same physician, or any…	730	$50	$32.9K
V2100	Sphere, single vision, plano to plus or minus 4.00, per lens	910	$30	$29K
V2020	Frames, purchases	790	$30	$19.9K
S0621	Routine ophthalmological examination including refraction; established patient	240	$40	$10.1K
V2784	Lens, polycarbonate or equal, any index, per lens	380	$10	$4.9K

Medicaid: Competitive Analysis & Benchmarks

How this provider's Medicaid billing volume and revenue compare to other District of Columbia providers billing the same CPT/HCPCS codes.

Claims Volume vs. District of Columbia Distribution

Lisa Ziliak — 2 of 10 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — District of Columbia

Full comparison — all codes billed, vs. District of Columbia median

10 rows

CPT/HCPCS Code	Description	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
92004	The provider performs a comprehensive level ophthalmological evaluation of a new patient and initiates a diagnostic and treatment program for one or more visits.	2	50	440	$80	$82.7K
92012	For this CPT code, an Ophthalmologist sees an established patient for an intermediate level eye examination. Generally, a patient is considered to be "established" if the same physician, or any…	10	30	490	$60	$81.8K
92014	An ophthalmologist sees an established patient for a comprehensive level eye examination. Generally, a patient is considered to be "established" if the same physician, or any physician in the group…	9	50	720	$60	$80.7K
V2784	Lens, polycarbonate or equal, any index, per lens	20	30	910	$40	$79.2K
S0620	Routine ophthalmological examination including refraction; new patient	1	10	1,280	$40	$55.8K
V2020	Frames, purchases	14	30	410	$30	$38.4K
92340	Code 92340 describes the fitting of eyeglasses, except for aphakia (absence of the crystalline lens as after cataract surgery); monofocal	3	20	1,900	$20	$37.7K
92015	The provider determines the process of determining if a patient's vision is less than 20/20 and by what amount so that corrective lenses or contact lenses can be prescribed and produced.	2	40	580	$10	$23.7K
V2100	Sphere, single vision, plano to plus or minus 4.00, per lens	6	20	180	$20	$12.9K
S0621	Routine ophthalmological examination including refraction; established patient	1	10	240	$40	$10.2K

Nearby Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Bennett Oberg	DC	Ophthalmology Physician	$374.2K	$0
Andrew Hammer	DC	Ophthalmology Physician	$216.4K	$1.9K
Richard Ernst	DC	Psychiatry Physician	$0	$165.7K
Brendan Doherty	DC	Diagnostic Radiology Physician	$139.7K	$460
Inger Rosner	DC	Urology Physician	$123.4K	$0
Melissa Scorza	DC	Dermatology Physician	$114.9K	$0
Brian Cuneo	DC	Pulmonary Disease Physician	$83.7K	$0
Sharon Seltzer	DC	Diagnostic Radiology Physician	$66K	$0
Jeffery Nelson	DC	Surgery Physician	$63.3K	$0
Matthew Park	DC	Internal Medicine Physician	$62.5K	$0

Lisa Ziliak — Billing Profile & Reimbursement Data

Sign up for Lisa Ziliak — Billing Profile & Reimbursement Data policy alerts

Lisa Ziliak — Billing Profile & Reimbursement Data

Sign up for Lisa Ziliak — Billing Profile & Reimbursement Data policy alerts

Medicaid: Total Revenue Breakdown by CPT/HCPCS Code

Medicaid: Complete Services Breakdown

Medicaid: Competitive Analysis & Benchmarks

Nearby Providers

Frequently Asked Questions

References