Leena S Ray, MD - Medicare Internal Medicine in Concord, CA

Leena S Ray, MD is a medicare enrolled "Internal Medicine - Nephrology" physician in Concord, California. Her current practice location is 2222 East Street, Ste 305, Concord, California. You can reach out to her office (for appointments etc.) via phone at (925) 686-1230.

Leena S Ray is licensed to practice in California (license number A84526) 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 1679574693.

Contact Information

Leena S Ray, MD
2222 East Street, Ste 305,
Concord, CA 94520-2066
(925) 686-1230
(925) 686-8443

Map and Direction




Physician's Profile

Full NameLeena S Ray
GenderFemale
SpecialityInternal Medicine - Nephrology
Location2222 East Street, Concord, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1679574693
  • Provider Enumeration Date: 08/02/2005
  • Last Update Date: 06/25/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 6608846316
  • Enrollment ID: I20040729000943

Medical Identifiers

Medical identifiers for Leena S Ray such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1679574693NPI-NPPES
P00163009OtherMEDICARE RAILROAD
CP2044OtherMEDICARE RAILROAD
GR0020610MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RN0300XInternal Medicine - Nephrology A84526 (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. Leena S Ray allows following entities to bill medicare on her behalf.
Entity NameDiablo Nephrology Medical Group, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194734731
PECOS PAC ID: 2365420965
Enrollment ID: O20040709001347
Entity NameJohn Muir Trauma Physicians Billing Service
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093864837
PECOS PAC ID: 3476542515
Enrollment ID: O20050420001452

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. Leena S Ray 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
Leena S Ray, MD
2222 East Street, Ste 305,
Concord, CA 94520-2066

Ph: (925) 686-1230
Leena S Ray, MD
2222 East Street, Ste 305,
Concord, CA 94520-2066

Ph: (925) 686-1230

Reviews and Comments


Internal Medicine Doctors in Concord, CA

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Phone: 925-674-2609    Fax: 925-674-2211

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.