Patrick Clarke Keller, MD - Medicare Hospitalist in Lake Forest, IL

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Patrick Clarke Keller, MD is a medicare enrolled "Hospitalist" physician in Lake Forest, Illinois. His current practice location is 1000 N Westmoreland Rd, Lake Forest, Illinois. You can reach out to his office (for appointments etc.) via phone at (847) 234-5600.

Patrick Clarke Keller is licensed to practice in Illinois (license number 036167282) 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 1972181188.

Contact Information

Patrick Clarke Keller, MD
1000 N Westmoreland Rd,
Lake Forest, IL 60045-1658
(847) 234-5600
(847) 535-7203

Map and Direction




Physician's Profile

Full NamePatrick Clarke Keller
GenderMale
SpecialityHospitalist
Location1000 N Westmoreland Rd, Lake Forest, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1972181188
  • Provider Enumeration Date: 03/30/2021
  • Last Update Date: 09/26/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 2466853718
  • Enrollment ID: I20240614003464

Medical Identifiers

Medical identifiers for Patrick Clarke Keller such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1972181188NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208M00000XHospitalist 036167282 (Illinois)Primary
207R00000XInternal Medicine 125077372 (Illinois)Secondary

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. Patrick Clarke Keller allows following entities to bill medicare on his behalf.
Entity NameNorthwestern Medical Faculty Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346235314
PECOS PAC ID: 4587576814
Enrollment ID: O20031105000541

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. Patrick Clarke Keller 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
Patrick Clarke Keller, MD
251 E Huron St,
Chicago, IL 60611-3055

Ph: (312) 926-2000		Patrick Clarke Keller, MD
1000 N Westmoreland Rd,
Lake Forest, IL 60045-1658

Ph: (847) 234-5600

Reviews and Comments


Hospitalist Doctors in Lake Forest, IL

Dr. Pooja Nayak, MD
Hospitalist
Medicare: Medicare Enrolled
Practice Location: 1000 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    Fax: 847-535-7203
Dr. Mohamed Moatez Bayoumi, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    Fax: 847-535-7203
Cheong M Yu,
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    Fax: 847-535-7203
Lillian Soong,
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 660 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    
Dr. Thomas Alexander Morrison, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 660 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-535-7181    
Swathy Reddy, MD
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 660 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    
Marissa Jane Versalle, DO
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Westmoreland Rd, Lake Forest, IL 60045
Phone: 847-234-5600    Fax: 847-535-7203

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.