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.

Gail Ishiyama (NPI 1639194038)

Field	Value
Entity Type	Individual
Organization	Gail Ishiyama
Address	300 Medical Plaza
City	Los Angeles
State	CA
ZIP	90095
Taxonomy	Neurology Physician
NPI Enumerated	July 13, 2006

Payer Source	Total Paid
Medicare	$125.5K
Medicaid	$0

Medicare: Complete Services Breakdown

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

8 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
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…	210	$150	$31.2K
92546	The provider measures various parameters of normal and pathological vestibular systems and also estimates the patient's visual acuity by checking the visual–vestibular interaction using sinusoidal…	210	$120	$25.2K
99205	The provider sees a new 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 provider…	130	$170	$22.3K
92540	The provider performs four specific tests, with recording, to check balance disorders. This code represents both the technical and professional components of the service.	210	$100	$20.9K
92517	In this procedure, the provider measures the patient’s response to high–level acoustic stimuli (sound) using electrodes placed on the neck (cervical region). The service includes interpretation and…	220	$70	$15.3K
92537	A caloric vestibular test refers to a qualitative test that involves sequentially irrigating both ears with warm and cold water while evaluating the patient’s eye movements. This helps measure the…	200	$40	$7.1K
92547	During a vestibular function test with recording, the provider uses additional vertical electrodes placed around the eye to assess nystagmus.	210	$10	$2.1K
95992	The provider moves the patient through a series of positions to treat benign paroxysmal positional vertigo. The position changes move canalith particles from parts of the inner ear where they cause…	40	$40	$1.5K

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 8 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. California Distribution

Gail Ishiyama — 4 of 8 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

8 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
99215	1,953	15,360	50	$130	$14.4K
92546	6	50	30	$120	$14.3K
99205	363	8,360	30	$170	$7.2K
92540	6	90	30	$90	$7K
92517	1	10	20	$70	$3.8K
95992	41	140	30	$40	$2.6K
92537	3	70	30	$30	$1.5K
92547	2	30	20	$10	$550

Related Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Sandeep Thakkar	CA	Neurology Physician	$1.4M	$92.5K
Dinesh Chhetri	CA	Otolaryngology Physician	$468.1K	$0
Aaron Feinstein	CA	Otolaryngology Physician	$275.6K	$0
Mark Tramo	CA	Neurology Physician	$208.2K	$0
Gerald Berke	CA	Otolaryngology Physician	$201.9K	$0
Kathleen Tingus	CA	Clinical Psychologist	$198.6K	$0
Alexan Yerevanian	NM	Neurology Physician	$193.5K	$0
Paul Vespa	CA	Neurology Physician	$192.4K	$0
Vivian Hoang	TX	Neurology Physician	$191.6K	$0
Jeffrey Suh	CA	Otolaryngology Physician	$186.4K	$0

Gail Ishiyama — Billing Profile & Reimbursement Data

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Gail Ishiyama — 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

Frequently Asked Questions

References