Dr Helen Ching-yei Chang, MD - Medicare Internal Medicine in Mission Viejo, CA

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Dr Helen Ching-yei Chang, MD is a medicare enrolled "Internal Medicine" physician in Mission Viejo, California. She went to Hahnemann University College Of Medicine and graduated in 1996 and has 30 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Mission Hills Medical Group Inc and her current practice location is 25982 Pala, Suite 250, Mission Viejo, California. You can reach out to her office (for appointments etc.) via phone at (949) 588-0051.

Dr Helen Ching-yei Chang is licensed to practice in California (license number A65088) 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 1639134687.

Contact Information

Dr Helen Ching-yei Chang, MD
25982 Pala, Suite 250,
Mission Viejo, CA 92691-6719
(949) 588-0051
(949) 588-0052

Map and Direction




Physician's Profile

Full NameDr Helen Ching-yei Chang
GenderFemale
SpecialityInternal Medicine
Experience30 Years
Location25982 Pala, Mission Viejo, 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 Helen Ching-yei Chang attended and graduated from Hahnemann University College Of Medicine in 1996
  NPI Data:
  • NPI Number: 1639134687
  • Provider Enumeration Date: 04/20/2006
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 6507891835
  • Enrollment ID: I20051007000170

Medical Identifiers

Medical identifiers for Dr Helen Ching-yei Chang such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1639134687NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A65088 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mission Hills Medical Group Inc86280039512

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 Helen Ching-yei Chang allows following entities to bill medicare on her behalf.
Entity NameMission Hills Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225093305
PECOS PAC ID: 8628003951
Enrollment ID: O20051005000508
Entity NamePacific Private Practice Network Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033501077
PECOS PAC ID: 1254659261
Enrollment ID: O20150422001711

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 Helen Ching-yei Chang 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 Helen Ching-yei Chang, MD
25982 Pala, Suite 250,
Mission Viejo, CA 92691-6719

Ph: (949) 588-0051		Dr Helen Ching-yei Chang, MD
25982 Pala, Suite 250,
Mission Viejo, CA 92691-6719

Ph: (949) 588-0051

Reviews and Comments


Internal Medicine Doctors in Mission Viejo, CA

Amy Thu Bui, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy, Suite 230, Mission Viejo, CA 92691
Phone: 949-542-8004    Fax: 949-364-3682
Michael Pm Truong, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy, Suite 230, Mission Viejo, CA 92691
Phone: 949-364-3330    Fax: 949-364-3682
Erene Nawar Sami, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy Ste 485, Mission Viejo, CA 92691
Phone: 949-364-5830    
Dr. Paul A Wehrle, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 26800 Crown Valley Pkwy., Suite 100, Mission Viejo, CA 92691
Phone: 949-364-6000    Fax: 949-364-1647
Dr. Brett Michael Wertman, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 27800 Medical Center Rd, Suite 222, Mission Viejo, CA 92691
Phone: 949-276-2446    Fax: 949-276-2449
Dr. Eric Olson Benner, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy Ste 315, Mission Viejo, CA 92691
Phone: 949-364-6000    Fax: 949-364-1204
Dr. Richard Jacob, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 26800 Crown Valley Pkwy, Suite 250, Mission Viejo, CA 92691
Phone: 949-364-3570    Fax: 949-364-3430

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.