William Scott Lock, MD - Medicare Obstetrics/gynecology in San Mateo, CA

William Scott Lock, MD is a medicare enrolled "Obstetrics & Gynecology" physician in San Mateo, California. He graduated from medical school in 1998 and has 26 years of diverse experience with area of expertise as Obstetrics/gynecology. He is a member of the group practice County Of San Mateo and his current practice location is 222 W 39th Ave, San Mateo, California. You can reach out to his office (for appointments etc.) via phone at (650) 573-2222.

William Scott Lock is licensed to practice in California (license number A69314) 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 1770656753.

Contact Information

William Scott Lock, MD
222 W 39th Ave,
San Mateo, CA 94403-4364
(650) 573-2222
Not Available

Map and Direction




Physician's Profile

Full NameWilliam Scott Lock
GenderMale
SpecialityObstetrics/gynecology
Experience26 Years
Location222 W 39th Ave, San Mateo, 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:
  • William Scott Lock graduated from medical school in 1998
  NPI Data:
  • NPI Number: 1770656753
  • Provider Enumeration Date: 11/16/2006
  • Last Update Date: 04/23/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 8628235892
  • Enrollment ID: I20120131000889

Medical Identifiers

Medical identifiers for William Scott Lock such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1770656753NPI-NPPES
00A693140MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology A69314 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
San Mateo Medical CenterSan mateo, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
County Of San Mateo9032023171262

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. William Scott Lock allows following entities to bill medicare on his behalf.
Entity NameCounty Of San Mateo
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1679642326
PECOS PAC ID: 9032023171
Enrollment ID: O20031126000292
Entity NameCounty Of San Mateo
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831268580
PECOS PAC ID: 9032023171
Enrollment ID: O20040123000822

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. William Scott Lock 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
William Scott Lock, MD
222 W 39th Ave,
San Mateo, CA 94403-4364

Ph: (650) 573-2222
William Scott Lock, MD
222 W 39th Ave,
San Mateo, CA 94403-4364

Ph: (650) 573-2222

Reviews and Comments


Obstetrics & Gynecology Doctors in San Mateo, CA

John Anderson, MD
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 222 W 39th Ave, San Mateo, CA 94403
Phone: 650-573-2222    
Dr. Alla Sragets, M.D.
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 101 S San Mateo Dr, Suite 112, San Mateo, CA 94401
Phone: 650-344-7799    Fax: 650-344-7802
Beatrice Anne Burke, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 136 N San Mateo Dr, Suite 101, San Mateo, CA 94401
Phone: 650-344-1114    Fax: 650-344-2274
Melissa Duncanson, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 136 N San Mateo Dr Ste 101, San Mateo, CA 94401
Phone: 650-344-1114    
Andrea Ruth Quintana, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 222 W 39th Ave Fl 3, San Mateo, CA 94403
Phone: 650-573-3702    Fax: 650-573-2237
James Rice Meier, MD
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 222 W 39th Ave, San Mateo, CA 94403
Phone: 650-573-2222    
Dr. Zelda Sarmiento De La Cruz, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 1 Baywood Ave Ste 7, San Mateo, CA 94402
Phone: 650-375-8482    

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.