Maria C Ramirez, MD - Medicare Internal Medicine in Walnut Creek, CA

Maria C Ramirez, MD is a medicare enrolled "Hospitalist" physician in Walnut Creek, California. She went to University Of Minnesota Medical School and graduated in 1997 and has 27 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Permanente Medical Group Inc and her current practice location is 1425 S Main St, Walnut Creek, California. You can reach out to her office (for appointments etc.) via phone at (925) 295-4000.

Maria C Ramirez is licensed to practice in California (license number A73370) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1558449652.

Contact Information

Maria C Ramirez, MD
1425 S Main St,
Walnut Creek, CA 94596-5318
(925) 295-4000
Not Available

Map and Direction




Physician's Profile

Full NameMaria C Ramirez
GenderFemale
SpecialityInternal Medicine
Experience27 Years
Location1425 S Main St, Walnut Creek, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Maria C Ramirez attended and graduated from University Of Minnesota Medical School in 1997
  NPI Data:
  • NPI Number: 1558449652
  • Provider Enumeration Date: 11/02/2006
  • Last Update Date: 12/13/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 4981884772
  • Enrollment ID: I20110211000007

Medical Identifiers

Medical identifiers for Maria C Ramirez such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1558449652NPI-NPPES
00A733700MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208M00000XHospitalist A73370 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Kaiser Foundation Hospital-san JoseSan jose, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Permanente Medical Group Inc89219102258376

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. Maria C Ramirez allows following entities to bill medicare on her behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710

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. Maria C Ramirez 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
Maria C Ramirez, MD
1800 Harrison St Fl 7,
Oakland, CA 94612-3466

Ph: (510) 625-6262
Maria C Ramirez, MD
1425 S Main St,
Walnut Creek, CA 94596-5318

Ph: (925) 295-4000

Reviews and Comments


Hospitalist Doctors in Walnut Creek, CA

Dr. Niceto Lopez, MD
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Practice Location: 801 Ygnacio Valley Rd, Suite 250, Walnut Creek, CA 94596
Phone: 925-946-1080    
Dr. Thomas Cresante, D.O.
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Medicare: Accepting Medicare Assignments
Practice Location: 1425 S Main St, Kaiser Permanente Walnut Creek Attn: Hbs Dept, Walnut Creek, CA 94596
Phone: 925-295-4643    
Maria L. Domantay, MD
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Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
Tsao-yu Liang, MD
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Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
Rujuta J. Manghani, MD
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Practice Location: 1450 Treat Blvd, Ste 160, Walnut Creek, CA 94597
Phone: 925-296-9000    
Timothy P. Corfman, MD
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Medicare: Not Enrolled in Medicare
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    
John Y. Kim, MD
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1425 S Main St, Walnut Creek, CA 94596
Phone: 925-295-4000    

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.