Natalie Cac, - Medicare Allergy & Immunology in Hayward, CA

  1. Home
  2. Allergy & Immunology
  3. CA
  4. Hayward
Natalie Cac, is a medicare enrolled "Allergy & Immunology" physician in Hayward, California. Her current practice location is 27303 Sleepy Hollow Ave S, Hayward, California. You can reach out to her office (for appointments etc.) via phone at (510) 784-6225.

Natalie Cac is licensed to practice in California (license number A102269) 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 1205006657.

Contact Information

Natalie Cac,
27303 Sleepy Hollow Ave S,
Hayward, CA 94545-4203
(510) 784-6225
Not Available

Map and Direction




Physician's Profile

Full NameNatalie Cac
GenderFemale
SpecialityAllergy & Immunology
Location27303 Sleepy Hollow Ave S, Hayward, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1205006657
  • Provider Enumeration Date: 03/01/2008
  • Last Update Date: 11/08/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 4082759055
  • Enrollment ID: I20100302000183

Medical Identifiers

Medical identifiers for Natalie Cac such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1205006657NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207K00000XAllergy & Immunology 48106 (Arizona)Secondary
207K00000XAllergy & Immunology A102269 (California)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. Natalie Cac allows following entities to bill medicare on her behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770515280
PECOS PAC ID: 6002729175
Enrollment ID: O20031110000678

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. Natalie Cac 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
Natalie Cac,
27303 Sleepy Hollow Ave S,
Hayward, CA 94545-4203

Ph: (107) 846-2255		Natalie Cac,
27303 Sleepy Hollow Ave S,
Hayward, CA 94545-4203

Ph: (510) 784-6225

Reviews and Comments


Allergy & Immunology Doctors in Hayward, CA

Robert L. Sachs, MD
Allergy & Immunology
Medicare: Not Enrolled in Medicare
Practice Location: 27400 Hesperian Blvd, Hayward, CA 94545
Phone: 510-784-4000    
Michael C. Louie, MD
Allergy & Immunology
Medicare: Not Enrolled in Medicare
Practice Location: 27400 Hesperian Blvd, Hayward, CA 94545
Phone: 510-784-4000    

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.