Andrea Heyn, MD - Medicare Family Practice in Merced, CA

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Andrea Heyn, MD is a medicare enrolled "Family Medicine" physician in Merced, California. She went to Loma Linda University School Of Medicine and graduated in 2013 and has 11 years of diverse experience with area of expertise as Family Practice. She is a member of the group practice Timothy S Johnston Md Pc, Golden Valley Health Center and her current practice location is 3349 G St Ste F, Merced, California. You can reach out to her office (for appointments etc.) via phone at (209) 349-8459.

Andrea Heyn is licensed to practice in California (license number A132106) 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 1194159319.

Contact Information

Andrea Heyn, MD
3349 G St Ste F,
Merced, CA 95340-0978
(209) 349-8459
(209) 233-9837

Map and Direction




Physician's Profile

Full NameAndrea Heyn
GenderFemale
SpecialityFamily Practice
Experience11 Years
Location3349 G St Ste F, Merced, 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:
  • Andrea Heyn attended and graduated from Loma Linda University School Of Medicine in 2013
  NPI Data:
  • NPI Number: 1194159319
  • Provider Enumeration Date: 08/23/2013
  • Last Update Date: 12/20/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 8022239441
  • Enrollment ID: I20190605002369

Medical Identifiers

Medical identifiers for Andrea Heyn such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194159319NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology A132106 (California)Secondary
207VX0000XObstetrics & Gynecology - Obstetrics A132106 (California)Secondary
207Q00000XFamily Medicine A132106 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercy Home CareMerced, CAHome health agency
Mercy Medical CenterMerced, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Timothy S Johnston Md Pc14566382387
Golden Valley Health Center418352718766

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. Andrea Heyn allows following entities to bill medicare on her behalf.
Entity NameGolden Valley Health Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1356445753
PECOS PAC ID: 4183527187
Enrollment ID: O20040128000641
Entity NameMerced Faculty Associates Medical Group Incorporated
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285623256
PECOS PAC ID: 4789678111
Enrollment ID: O20040409000199
Entity NameMerced Hospitalist Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1730431875
PECOS PAC ID: 5890948582
Enrollment ID: O20130108000022
Entity NameTimothy S Johnston Md Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1407306665
PECOS PAC ID: 1456638238
Enrollment ID: O20170503002455

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. Andrea Heyn 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
Andrea Heyn, MD
3349 G St Ste F,
Merced, CA 95340-0978

Ph: (209) 349-8459		Andrea Heyn, MD
3349 G St Ste F,
Merced, CA 95340-0978

Ph: (209) 349-8459

Reviews and Comments


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Dr. Kim Marie Hartwig, MD
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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.