Dr Dionisio A Fernandes, MD - Medicare Allergy & Immunology in San Leandro, CA

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Dr Dionisio A Fernandes, MD is a medicare enrolled "Allergy & Immunology - Allergy" physician in San Leandro, California. His current practice location is 13847 E 14th St., Ste 112, San Leandro, California. You can reach out to his office (for appointments etc.) via phone at (510) 352-8585.

Dr Dionisio A Fernandes is licensed to practice in California (license number A29416) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1285691121.

Contact Information

Dr Dionisio A Fernandes, MD
13847 E 14th St., Ste 112,
San Leandro, CA 94578
(510) 352-8585
(510) 352-8644

Map and Direction




Physician's Profile

Full NameDr Dionisio A Fernandes
GenderMale
SpecialityAllergy & Immunology - Allergy
Location13847 E 14th St., San Leandro, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1285691121
  • Provider Enumeration Date: 04/26/2006
  • Last Update Date: 10/25/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 6800953936
  • Enrollment ID: I20090317000460

Medical Identifiers

Medical identifiers for Dr Dionisio A Fernandes such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285691121NPI-NPPES
GR0066330MedicaidCA
GR0066331MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207KA0200XAllergy & Immunology - Allergy A29416 (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. Dr Dionisio A Fernandes allows following entities to bill medicare on his behalf.
Entity NameBaz Allergy Asthma & Sinus Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1710906995
PECOS PAC ID: 6507770716
Enrollment ID: O20031112000791
Entity NameColumbia Asthma & Allergy Clinic
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962687566
PECOS PAC ID: 4688606536
Enrollment ID: O20090904000403

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 Dionisio A Fernandes 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 Dionisio A Fernandes, MD
3448 Mowry Ave,
Fremont, CA 94538-1422

Ph: (510) 373-3000		Dr Dionisio A Fernandes, MD
13847 E 14th St., Ste 112,
San Leandro, CA 94578

Ph: (510) 352-8585

Reviews and Comments


Allergy & Immunology Doctors in San Leandro, CA

Dr. Paul P Cheng, MD
Allergy & Immunology
Medicare: Not Enrolled in Medicare
Practice Location: 433 Estudillo Avenue, Suite 206, San Leandro, CA 94577
Phone: 510-352-8585    Fax: 510-352-8644
Farinaz Farrahi, MD
Allergy & Immunology
Medicare: Medicare Enrolled
Practice Location: 13847 E 14th Street Ste 112, San Leandro, CA 94578
Phone: 510-352-8535    Fax: 510-352-8644

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.