Diana Guillaume, NP - Medicare Nurse Practitioner in Chicago, IL

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Diana Guillaume, NP is a medicare enrolled "Nurse Practitioner - Adult Health" in Chicago, Illinois. She graduated from nursing school in 2009 and has 15 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Oak Street Health Physicians Group Pc and her current practice location is 4848 W Irving Park Rd, Chicago, Illinois. You can reach out to her office (for appointments etc.) via phone at (773) 724-6200.

Diana Guillaume is licensed to practice in Illinois (license number 209.008741) 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 1396037685.

Contact Information

Diana Guillaume, NP
4848 W Irving Park Rd,
Chicago, IL 60641-2718
(773) 724-6200
(773) 866-8015

Map and Direction




Provider's Profile

Full NameDiana Guillaume
GenderFemale
SpecialityNurse Practitioner
Experience15 Years
Location4848 W Irving Park Rd, Chicago, Illinois
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:
  • Diana Guillaume graduated from nursing school in 2009
  NPI Data:
  • NPI Number: 1396037685
  • Provider Enumeration Date: 05/05/2011
  • Last Update Date: 11/04/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 0042532806
  • Enrollment ID: I20141204002482

Medical Identifiers

Medical identifiers for Diana Guillaume such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1396037685NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LA2200XNurse Practitioner - Adult Health 209.008741 (Illinois)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Oak Street Health Physicians Group Pc7517109879187

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. Diana Guillaume allows following entities to bill medicare on her behalf.
Entity NameOak Street Health Physicians Group Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1083051643
PECOS PAC ID: 7517109879
Enrollment ID: O20130815000670
Entity NameOsh-il Physicians Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265977698
PECOS PAC ID: 3870877699
Enrollment ID: O20170222002860

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. Diana Guillaume 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
Diana Guillaume, NP
Po Box 746721,
Atlanta, GA 30374-6721

Ph: (773) 352-1515		Diana Guillaume, NP
4848 W Irving Park Rd,
Chicago, IL 60641-2718

Ph: (773) 724-6200

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).

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.