Dr Gretchen Kunitz, MD - Medicare Internal Medicine in Walnut Creek, CA

Dr Gretchen Kunitz, MD is a medicare enrolled "Internal Medicine" physician in Walnut Creek, California. She went to University Of California, San Francisco School Of Medicine and graduated in 1980 and has 44 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice John Muir Physician Network and her current practice location is 2621 Shadelands Drive, Walnut Creek, California. You can reach out to her office (for appointments etc.) via phone at (925) 947-0417.

Dr Gretchen Kunitz is licensed to practice in California (license number G47367) 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 1144406273.

Contact Information

Dr Gretchen Kunitz, MD
2621 Shadelands Drive,
Walnut Creek, CA 94598
(925) 947-0417
Not Available

Map and Direction




Physician's Profile

Full NameDr Gretchen Kunitz
GenderFemale
SpecialityInternal Medicine
Experience44 Years
Location2621 Shadelands Drive, 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:
  • Dr Gretchen Kunitz attended and graduated from University Of California, San Francisco School Of Medicine in 1980
  NPI Data:
  • NPI Number: 1144406273
  • Provider Enumeration Date: 01/18/2008
  • Last Update Date: 06/18/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 7416193800
  • Enrollment ID: I20130409000028

Medical Identifiers

Medical identifiers for Dr Gretchen Kunitz such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1144406273NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine G47367 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
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. Dr Gretchen Kunitz 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. Dr Gretchen Kunitz 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 Gretchen Kunitz, MD
2621 Shadelands Drive,
Walnut Creek, CA 94598

Ph: (925) 947-0417
Dr Gretchen Kunitz, MD
2621 Shadelands Drive,
Walnut Creek, CA 94598

Ph: (925) 947-0417

Reviews and Comments


Internal Medicine Doctors in Walnut Creek, CA

Dr. Joseph Patrick Henry, M.D.
Internal Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 925-947-3393    Fax: 925-947-3396
Mr. Ramin Khashayar, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1399 Ygnacio Valley Rd, Ste 14, Walnut Creek, CA 94598
Phone: 925-939-3050    Fax: 925-939-3057
Dr. Hennessey Tseng, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1450 Treat Blvd, Suite 220b, Walnut Creek, CA 94597
Phone: 925-937-1770    Fax: 925-937-0630
Dr. Ali-reza Barmaki, M.D.
Internal Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 925-947-3393    Fax: 925-947-3396
Dr. Cynthia M. Mullen, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2637 Shadelands Dr, Walnut Creek, CA 94598
Phone: 925-322-2372    Fax: 925-322-6720
Mr. David Nathanson,
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 320 Lennon Ln, Walnut Creek, CA 94598
Phone: 925-906-2000    
Mark D Nathan, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 106 La Casa Via, #140, Walnut Creek, CA 94598
Phone: 925-274-2860    Fax: 925-932-4527

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.