Irene Ung, NP - Medicare Nurse Practitioner in San Francisco, CA

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Irene Ung, NP is a medicare enrolled "Nurse Practitioner - Acute Care" in San Francisco, California. She graduated from nursing school in 2025 and has 1 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Ucsf Medical Group Business Services, University Anesthesia Medical Group, Regents Of The University Of California, Ucsf Dept Of Surgery and her current practice location is 400 Parnassus Ave, San Francisco, California. You can reach out to her office (for appointments etc.) via phone at (415) 476-1000.

Irene Ung is licensed to practice in California (license number 95035686) 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 1790668911.

Contact Information

Irene Ung, NP
400 Parnassus Ave,
San Francisco, CA 94143-2202
(415) 476-1000
Not Available

Map and Direction




Provider's Profile

Full NameIrene Ung
GenderFemale
SpecialityNurse Practitioner
Experience1 Years
Location400 Parnassus Ave, San Francisco, 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:
  • Irene Ung graduated from nursing school in 2025
  NPI Data:
  • NPI Number: 1790668911
  • Provider Enumeration Date: 07/26/2025
  • Last Update Date: 07/26/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4183122542
  • Enrollment ID: I20250813004024

Medical Identifiers

Medical identifiers for Irene Ung such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1790668911NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LG0600XNurse Practitioner - Gerontology 95035686 (California)Secondary
363LA2100XNurse Practitioner - Acute Care 95035686 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Ucsf Medical CenterSan francisco, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Ucsf Medical Group Business Services37794978701533
University Anesthesia Medical Group2769370535402
Regents Of The University Of California4284547274706
Ucsf Dept Of Surgery7719886373211

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. Irene Ung allows following entities to bill medicare on her behalf.
Entity NameRegents of the University of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760552343
PECOS PAC ID: 4284547274
Enrollment ID: O20031106000389
Entity NameUCSF Pediatrics Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376614016
PECOS PAC ID: 6204749112
Enrollment ID: O20031106000823
Entity NameUniversity of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameUCSF Dept of Surgery
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477627537
PECOS PAC ID: 7719886373
Enrollment ID: O20040102000839
Entity NameUniversity Anesthesia Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1528137296
PECOS PAC ID: 2769370535
Enrollment ID: O20040304001219
Entity NameUCSF Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

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. Irene Ung 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
Irene Ung, NP
518 Gellert Dr,
San Francisco, CA 94132-1212

Ph: (415) 317-3783		Irene Ung, NP
400 Parnassus Ave,
San Francisco, CA 94143-2202

Ph: (415) 476-1000

Reviews and Comments


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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).

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