Ms Ryuko Ishikawa, MD - Medicare Psychiatry & Neurology in San Mateo, CA

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Ms Ryuko Ishikawa, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in San Mateo, California. Her current practice location is 138 E Hillsdale Blvd, San Mateo, California. You can reach out to her office (for appointments etc.) via phone at (415) 640-1455.

Ms Ryuko Ishikawa is licensed to practice in California (license number A42754) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1053629634.

Contact Information

Ms Ryuko Ishikawa, MD
138 E Hillsdale Blvd,
San Mateo, CA 94403-2817
(415) 640-1455
Not Available

Map and Direction




Physician's Profile

Full NameMs Ryuko Ishikawa
GenderFemale
SpecialityPsychiatry & Neurology - Psychiatry
Location138 E Hillsdale Blvd, San Mateo, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1053629634
  • Provider Enumeration Date: 09/17/2010
  • Last Update Date: 01/19/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 8921326729
  • Enrollment ID: I20150407001429

Medical Identifiers

Medical identifiers for Ms Ryuko Ishikawa such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1053629634NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry A42754 (California)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Ms Ryuko Ishikawa allows following entities to bill medicare on her behalf.
Entity NameCounty Of Santa Clara
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1699885079
PECOS PAC ID: 1254244973
Enrollment ID: O20040113000784
Entity NameCounty Of Solano
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508072588
PECOS PAC ID: 7911893177
Enrollment ID: O20040224001362
Entity NameCounty Of Santa Clara
Entity TypePart B Supplier - Other Medical Care Group
Entity IdentifiersNPI Number: 1629301346
PECOS PAC ID: 1254244973
Enrollment ID: O20110318000170
Entity NameHeal Psychiatric Services Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1174987119
PECOS PAC ID: 6901105873
Enrollment ID: O20160427000624
Entity NameSpread Your Wings For Mental Health Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760969539
PECOS PAC ID: 1355680273
Enrollment ID: O20190311001711
Entity NameOcean Psychiatry Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396306338
PECOS PAC ID: 6305277633
Enrollment ID: O20200520002277

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Ms Ryuko Ishikawa is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Ms Ryuko Ishikawa, MD
570 Blossom Hill Rd,
San Jose, CA 95123-3212

Ph: (855) 799-4647		Ms Ryuko Ishikawa, MD
138 E Hillsdale Blvd,
San Mateo, CA 94403-2817

Ph: (415) 640-1455

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.