Ryuko Ishikawa, MD
NPI 1053629634 · Psychiatry Physician · San Mateo, CA
Ryuko Ishikawa, MD is a Psychiatry Physician provider in San Mateo, CA (NPI 1053629634).
Provider details
- NPI number
- 1053629634
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A42754 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 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
Additional practice locations (1)
- 1055 W Henderson AvePorterville, CA 93257-1490Phone: (559) 788-1200
Registry dates
- Enumerated
- 2010-09-17
- Last updated
- 2024-01-19
- Certified
- 2024-01-19
Frequently asked questions
- What is Ryuko Ishikawa's NPI number?
- Ryuko Ishikawa's National Provider Identifier (NPI) is 1053629634, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryuko Ishikawa's specialty?
- Ryuko Ishikawa is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Ryuko Ishikawa located?
- Ryuko Ishikawa's practice location on file with NPPES is 138 E Hillsdale Blvd, San Mateo, CA 94403-2817.
- What is Ryuko Ishikawa's phone number?
- The practice phone number listed in the NPPES registry for Ryuko Ishikawa is (415) 640-1455.
- Is Ryuko Ishikawa's NPI active?
- Yes — Ryuko Ishikawa's NPI (1053629634) is active in the NPPES registry as of the last update on 2024-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.