Dr John W Roark Jr, MD - Medicare in Oakland, CA

Dr John W Roark Jr, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Oakland, California. His current practice location is 300 Frank Ogawa Plaza, Ste 450, Oakland, California. You can reach out to his office (for appointments etc.) via phone at (510) 444-3297.

Dr John W Roark Jr is licensed to practice in California (license number G038581) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1609834266.

Contact Information

Dr John W Roark Jr, MD
300 Frank Ogawa Plaza, Ste 450,
Oakland, CA 94612
(510) 444-3297
(510) 548-2701

Map and Direction




Physician's Profile

Full NameDr John W Roark Jr
GenderMale
Speciality
Experience Years
Location300 Frank Ogawa Plaza, Oakland, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr John W Roark Jr attended and graduated from in
  NPI Data:
  • NPI Number: 1609834266
  • Provider Enumeration Date: 05/03/2006
  • Last Update Date: 05/01/2013
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Dr John W Roark Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1609834266NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology G038581 (California)Primary

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. Dr John W Roark Jr 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
Dr John W Roark Jr, MD
300 Frank Ogawa Plaza, Ste 450,
Oakland, CA 94612

Ph: (510) 444-3297
Dr John W Roark Jr, MD
300 Frank Ogawa Plaza, Ste 450,
Oakland, CA 94612

Ph: (510) 444-3297

Reviews and Comments


Internal Medicine Doctors in Oakland, CA

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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).

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