Gianna O'hara, DO - Medicare Geriatric Medicine in Pomona, CA

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Gianna O'hara, DO is a medicare enrolled "Internal Medicine - Geriatric Medicine" physician in Pomona, California. She graduated from medical school in 2017 and has 7 years of diverse experience with area of expertise as Geriatric Medicine. She is a member of the group practice Premier Family Medicine Associates, Inc and her current practice location is 1770 N Orange Grove Ave Ste 101, Pomona, California. You can reach out to her office (for appointments etc.) via phone at (909) 469-9494.

Gianna O'hara is licensed to practice in California (license number 18033) 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 1467980961.

Contact Information

Gianna O'hara, DO
1770 N Orange Grove Ave Ste 101,
Pomona, CA 91767-3027
(909) 469-9494
(909) 469-2120

Map and Direction




Physician's Profile

Full NameGianna O'hara
GenderFemale
SpecialityGeriatric Medicine
Experience7 Years
Location1770 N Orange Grove Ave Ste 101, Pomona, 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:
  • Gianna O'hara graduated from medical school in 2017
  NPI Data:
  • NPI Number: 1467980961
  • Provider Enumeration Date: 05/27/2017
  • Last Update Date: 03/07/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3476818634
  • Enrollment ID: I20210618002140

Medical Identifiers

Medical identifiers for Gianna O'hara such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1467980961NPI-NPPES
1467980961MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine R2826 (Arizona)Secondary
207RG0300XInternal Medicine - Geriatric Medicine OP61041037 (Washington)Secondary
390200000XStudent In An Organized Health Care Education/training Program R2826 (Arizona)Secondary
207RG0300XInternal Medicine - Geriatric Medicine 18033 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Calcare Hospice, IncRancho cucamonga, CAHospice
Vna Hospice & Palliative Care Of Southern Ca, IncClaremont, CAHospice
Pomona Valley Hospital Medical CenterPomona, CAHospital
San Antonio Regional HospitalUpland, CAHospital
Woods Health ServicesLa verne, CANursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Premier Family Medicine Associates, Inc428454752260

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. Gianna O'hara allows following entities to bill medicare on her behalf.
Entity NamePremier Family Medicine Associates, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912907114
PECOS PAC ID: 4284547522
Enrollment ID: O20031111000889

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. Gianna O'hara 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
Gianna O'hara, DO
1770 N Orange Grove Ave Ste 101,
Pomona, CA 91767-3027

Ph: (909) 469-9494		Gianna O'hara, DO
1770 N Orange Grove Ave Ste 101,
Pomona, CA 91767-3027

Ph: (909) 469-9494

Reviews and Comments


Internal Medicine Doctors in Pomona, CA

Kenneth Spiers Brown, MD
Geriatric Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1866 N Orange Grove Ave, Ste 102, Pomona, CA 91767
Phone: 909-620-4373    Fax: 909-620-7179
Lisa Carrie Butler,
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 790 East Bonita Ave, 2nd Floor, Pomona, CA 91767
Phone: 909-447-8585    Fax: 909-447-8593
Dr. Kerry Norman Gott, M.D.
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 255 E Bonita Ave, Pomona, CA 91767
Phone: 909-596-7733    Fax: 909-450-0357
Dr. Monica A Wong, M.D.
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 750 S Park Ave, Pomona, CA 91766
Phone: 909-868-0235    Fax: 909-623-0571
Ossama Maloule, M.D.
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 255 E Bonita Ave Bldg 1b, Pomona, CA 91767
Phone: 909-275-7470    Fax: 909-971-4532
Rita Patrick, M.D.
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1880 N Orange Grove Ave, Pomona, CA 91767
Phone: 909-630-7158    
Nadir Ali Eltahir, MD
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1940 N Orange Grove Ave, Pomona, CA 91767
Phone: 909-865-6900    Fax: 909-865-6300

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.