Cynthia Ashbrook, - Medicare Family Practice in Walnut Creek, CA

Cynthia Ashbrook, is a medicare enrolled "Allergy & Immunology" physician in Walnut Creek, California. She went to University Of South Carolina School Of Medicine and graduated in 1987 and has 37 years of diverse experience with area of expertise as Family Practice. She is a member of the group practice John Muir Physician Network and her current practice location is 1450 Treat Blvd, Suite 300, Walnut Creek, California. You can reach out to her office (for appointments etc.) via phone at (925) 952-2888.

Cynthia Ashbrook is licensed to practice in California (license number G63996) 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 1386786408.

Contact Information

Cynthia Ashbrook,
1450 Treat Blvd, Suite 300,
Walnut Creek, CA 94597-2168
(925) 952-2888
Not Available

Map and Direction




Physician's Profile

Full NameCynthia Ashbrook
GenderFemale
SpecialityFamily Practice
Experience37 Years
Location1450 Treat Blvd, 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:
  • Cynthia Ashbrook attended and graduated from University Of South Carolina School Of Medicine in 1987
  NPI Data:
  • NPI Number: 1386786408
  • Provider Enumeration Date: 02/13/2007
  • Last Update Date: 05/09/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 2466639984
  • Enrollment ID: I20170605002023

Medical Identifiers

Medical identifiers for Cynthia Ashbrook such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1386786408NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207K00000XAllergy & Immunology G63996 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
John Muir Medical Center - Concord CampusConcord, CAHospital
John Muir Medical Center - Walnut Creek CampusWalnut creek, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
John Muir Physician Network6608789813442

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. Cynthia Ashbrook allows following entities to bill medicare on her behalf.
Entity NameJohn Muir Physician Network
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1841407665
PECOS PAC ID: 6608789813
Enrollment ID: O20031226000143

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. Cynthia Ashbrook 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
Cynthia Ashbrook,
1450 Treat Blvd, Suite 300,
Walnut Creek, CA 94597-2168

Ph: (925) 952-2888
Cynthia Ashbrook,
1450 Treat Blvd, Suite 300,
Walnut Creek, CA 94597-2168

Ph: (925) 952-2888

Reviews and Comments


Allergy & Immunology Doctors in Walnut Creek, CA

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Dr. Joshua Samuel Jacobs, MD
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Practice Location: 370 N Wiget Ln Ste 210, Walnut Creek, CA 94598
Phone: 925-935-6252    Fax: 925-930-0942

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.