Gail Ishiyama, MD
NPI 1639194038 · Neurology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gail Ishiyama, MD is a Neurology Physician provider in Los Angeles, CA (NPI 1639194038).
Provider details
- NPI number
- 1639194038
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G80933 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,323 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Evaluation and Testing for Balance With Recording92540 | 200 | $117 |
| Use of Electrodes During Balance Testing92547 | 200 | $12 |
| Test for Abnormal Eye Movement Using a Rotating Chair92546 | 199 | $153 |
| Vemp Testing of Lower Branch of Inner Ear Nerve With Interpretation and Report92517 | 198 | $86 |
| Test to Assess Balance During Warm and Cool Irrigation in Both Ears92537 | 190 | $43 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 178 | $192 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Meclizine Hcl | 14 |
| Gabapentin | 14 |
| Acetazolamide | 13 |
| Sumatriptan | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$121 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-13
- Last updated
- 2020-01-17
- Certified
- 2020-01-17
Frequently asked questions
- What is Gail Ishiyama's NPI number?
- Gail Ishiyama's National Provider Identifier (NPI) is 1639194038, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gail Ishiyama's specialty?
- Gail Ishiyama is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Gail Ishiyama located?
- Gail Ishiyama's practice location on file with NPPES is 300 Medical Plaza, Los Angeles, CA 90095.
- What is Gail Ishiyama's phone number?
- The practice phone number listed in the NPPES registry for Gail Ishiyama is (310) 794-1195.
- Does Gail Ishiyama accept Medicare?
- Gail Ishiyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gail Ishiyama's NPI active?
- Yes — Gail Ishiyama's NPI (1639194038) is active in the NPPES registry as of the last update on 2020-01-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.