Marisa Kathleen Holubar, MD - Medicare Infectious Disease in Stanford, CA

Marisa Kathleen Holubar, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in Stanford, California. She went to University Of Wisconsin School Of Medicine and graduated in 2005 and has 19 years of diverse experience with area of expertise as Infectious Disease. She is a member of the group practice Stanford Health Care and her current practice location is 300 Pasteur Dr, Stanford, California. You can reach out to her office (for appointments etc.) via phone at (650) 498-3333.

Marisa Kathleen Holubar is licensed to practice in California (license number A110386) 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 1558588939.

Contact Information

Marisa Kathleen Holubar, MD
300 Pasteur Dr,
Stanford, CA 94305-2200
(650) 498-3333
Not Available

Map and Direction




Physician's Profile

Full NameMarisa Kathleen Holubar
GenderFemale
SpecialityInfectious Disease
Experience19 Years
Location300 Pasteur Dr, Stanford, 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:
  • Marisa Kathleen Holubar attended and graduated from University Of Wisconsin School Of Medicine in 2005
  NPI Data:
  • NPI Number: 1558588939
  • Provider Enumeration Date: 04/19/2007
  • Last Update Date: 03/03/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3173789112
  • Enrollment ID: I20120719000468

Medical Identifiers

Medical identifiers for Marisa Kathleen Holubar such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1558588939NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics A110386 (California)Secondary
207RI0200XInternal Medicine - Infectious Disease A110386 (California)Primary
208000000XPediatrics LP00183 (Rhode Island)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Stanford Health CareStanford, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Stanford Health Care67097974912572

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. Marisa Kathleen Holubar allows following entities to bill medicare on her behalf.
Entity NameStanford Health Care
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437292927
PECOS PAC ID: 6709797491
Enrollment ID: O20031124000348
Entity NameCounty Of Santa Clara
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1699885079
PECOS PAC ID: 1254244973
Enrollment ID: O20040113000784

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. Marisa Kathleen Holubar 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
Marisa Kathleen Holubar, MD
300 Pasteur Dr,
Stanford, CA 94305-2200

Ph: (650) 723-4000
Marisa Kathleen Holubar, MD
300 Pasteur Dr,
Stanford, CA 94305-2200

Ph: (650) 498-3333

Reviews and Comments


Internal Medicine Doctors in Stanford, CA

Prista Charuworn, MD
Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 300 Pasteur Dr, Alway Build M211, Mc 5187, Stanford, CA 94305
Phone: 650-723-6661    
Dr. Yu Kuang Lai, MD
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    
Andrea Lorenze, M.D.
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Drive, Lane 154, Stanford, CA 94305
Phone: 650-723-6661    Fax: 650-498-6205
Audra Horomanski,
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    Fax: 650-498-6205
Dr. Meghan Brady Marmor, MD
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, H3143, Stanford, CA 94305
Phone: 650-723-1150    Fax: 650-725-5489
Lauren Michelle Ulsh, MD
Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 300 Pasteur Dr, Stanford, CA 94305
Phone: 650-723-4000    
Ann M Chen, MD
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 300 Pasteur Dr, A149, Mc5202, Stanford, CA 94305
Phone: 650-725-3376    Fax: 650-723-8305

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.