Sigrid Gardner Williams, MD - Medicare Obstetrics & Gynecology in Phoenix, AZ

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Sigrid Gardner Williams, MD is a medicare enrolled "Obstetrics & Gynecology" physician in Phoenix, Arizona. Her current practice location is 4751 N 15th St, Phoenix, Arizona. You can reach out to her office (for appointments etc.) via phone at (602) 263-2220.

Sigrid Gardner Williams is licensed to practice in Arizona (license number 57253) 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 1033485511.

Contact Information

Sigrid Gardner Williams, MD
4751 N 15th St,
Phoenix, AZ 85014-3707
(602) 263-2220
(602) 916-0600

Map and Direction




Physician's Profile

Full NameSigrid Gardner Williams
GenderFemale
SpecialityObstetrics & Gynecology
Location4751 N 15th St, Phoenix, Arizona
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1033485511
  • Provider Enumeration Date: 03/28/2012
  • Last Update Date: 09/15/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6406136605
  • Enrollment ID: I20190513000974

Medical Identifiers

Medical identifiers for Sigrid Gardner Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033485511NPI-NPPES
462098MedicaidAZ
57253OtherAZAZ MEDICAL BOARD

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology A128995 (California)Secondary
207V00000XObstetrics & Gynecology 57253 (Arizona)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. Sigrid Gardner Williams allows following entities to bill medicare on her behalf.
Entity NameGenesis Ob Gyn Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1992994214
PECOS PAC ID: 4284724279
Enrollment ID: O20071213000739

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. Sigrid Gardner Williams 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
Sigrid Gardner Williams, MD
200 W Arbor Dr # Mc8433,
San Diego, CA 92103-1911

Ph: (928) 925-5088		Sigrid Gardner Williams, MD
4751 N 15th St,
Phoenix, AZ 85014-3707

Ph: (602) 263-2220

Reviews and Comments


Obstetrics & Gynecology Doctors in Phoenix, AZ

Mr. Memie Clifton Burton, MD.
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 4212 N 16th Street, Phoenix, AZ 85016
Phone: 602-263-1511    Fax: 602-263-1637
Karen Christine Adams, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 4212 N 16th St, Phoenix, AZ 85016
Phone: 602-263-1511    Fax: 602-263-1619
Dr. Jose Gomez Cisneros, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 3140 N 35th Ave Ste 7, Phoenix, AZ 85017
Phone: 602-353-6656    Fax: 602-442-2065
Dr. Joel Barkley, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 2601 E Roosevelt St, Phoenix, AZ 85008
Phone: 602-344-5011    
Dr. Robert Stuart Fowler, M.D.
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 5779 E Mayo Blvd, Phoenix, AZ 85054
Phone: 480-301-8000    
Mark D Johnson, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 1701 E Thomas Rd, Building 1 Suite 101, Phoenix, AZ 85016
Phone: 602-343-2767    Fax: 602-343-2766
Jill D Gibson, M.D.
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 1313 E Osborn Rd Ste 250, Phoenix, AZ 85014
Phone: 602-265-9161    Fax: 602-265-1823

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.