Helen Woohee Yang, MD - Medicare Internal Medicine in Castro Valley, CA

Helen Woohee Yang, MD is a medicare enrolled "Internal Medicine" physician in Castro Valley, California. She graduated from medical school in 2016 and has 8 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Alameda Health System, University Healthcare Alliance and her current practice location is 20642 John Dr, Castro Valley, California. You can reach out to her office (for appointments etc.) via phone at (510) 806-2100.

Helen Woohee Yang is licensed to practice in California (license number A153680) 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 1003270877.

Contact Information

Helen Woohee Yang, MD
20642 John Dr,
Castro Valley, CA 94546-5103
(510) 806-2100
(323) 226-2657

Map and Direction




Physician's Profile

Full NameHelen Woohee Yang
GenderFemale
SpecialityInternal Medicine
Experience8 Years
Location20642 John Dr, Castro Valley, 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:
  • Helen Woohee Yang graduated from medical school in 2016
  NPI Data:
  • NPI Number: 1003270877
  • Provider Enumeration Date: 04/07/2016
  • Last Update Date: 04/29/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 6608284179
  • Enrollment ID: I20210421002849

Medical Identifiers

Medical identifiers for Helen Woohee Yang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1003270877NPI-NPPES
HY3232267556MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A153680 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Highland HospitalOakland, CAHospital
Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Alameda Health System3779494521533
University Healthcare Alliance6305748799341

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. Helen Woohee Yang allows following entities to bill medicare on her behalf.
Entity NameAlameda Health System
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1740332931
PECOS PAC ID: 3779494521
Enrollment ID: O20031110000764
Entity NameStanford Health Care
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437292927
PECOS PAC ID: 6709797491
Enrollment ID: O20031124000348
Entity NameUniversity Healthcare Alliance
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760531198
PECOS PAC ID: 6305748799
Enrollment ID: O20040126000292

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. Helen Woohee Yang 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
Helen Woohee Yang, MD
20642 John Dr,
Castro Valley, CA 94546-5103

Ph: (510) 806-2100
Helen Woohee Yang, MD
20642 John Dr,
Castro Valley, CA 94546-5103

Ph: (510) 806-2100

Reviews and Comments


Internal Medicine Doctors in Castro Valley, CA

Dr. Oluwaseyi Segun Balasire, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-727-3256    Fax: 510-727-3107
Sarah Noonberg, MD, PHD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-889-5082    
Dr. Moyra N Rasheed, M.B.B.S
Internal Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-727-3256    Fax: 510-727-3107
Vishal Ghevariya, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 19845 Lake Chabot Rd, Ste 104, Castro Valley, CA 94546
Phone: 510-537-4415    Fax: 510-537-8265
Omar Faisal Saleem, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-727-3256    Fax: 510-727-3107
Stefani Wedl, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-889-5082    

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.