Matthew William Stier, MD - Medicare Internal Medicine in Lake Barrington, IL

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Matthew William Stier, MD is a medicare enrolled "Internal Medicine" physician in Lake Barrington, Illinois. He went to University Of Illinois College Of Med (chi/peor/rock/chm-urb) and graduated in 2013 and has 13 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Rockford Gastroenterology Associates Ltd, Osf Multi-specialty Group and his current practice location is 22285 N Pepper Rd Ste 311, Lake Barrington, Illinois. You can reach out to his office (for appointments etc.) via phone at (847) 382-4410.

Matthew William Stier is licensed to practice in Illinois (license number 125062675) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1902244791.

Contact Information

Matthew William Stier, MD
22285 N Pepper Rd Ste 311,
Lake Barrington, IL 60010-2541
(847) 382-4410
Not Available

Map and Direction




Physician's Profile

Full NameMatthew William Stier
GenderMale
SpecialityInternal Medicine
Experience13 Years
Location22285 N Pepper Rd Ste 311, Lake Barrington, Illinois
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Matthew William Stier attended and graduated from University Of Illinois College Of Med (chi/peor/rock/chm-urb) in 2013
  NPI Data:
  • NPI Number: 1902244791
  • Provider Enumeration Date: 06/13/2013
  • Last Update Date: 10/19/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 1850524760
  • Enrollment ID: I20190814003074

Medical Identifiers

Medical identifiers for Matthew William Stier such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1902244791NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 125062675 (Illinois)Primary
207RG0100XInternal Medicine - Gastroenterology 036139723 (Illinois)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Saint Anthony Medical CenterRockford, ILHospital
Uw HealthRockford, ILHospital
Rochelle Community HospitalRochelle, ILHospital
Osf Saint Elizabeth Medical CenterPeru, ILHospital
Osf Saint Paul Medical CenterMendota, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Rockford Gastroenterology Associates Ltd993118408227
Osf Multi-specialty Group36788897892123

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. Matthew William Stier allows following entities to bill medicare on his behalf.
Entity NameRockford Gastroenterology Associates Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1447207741
PECOS PAC ID: 9931184082
Enrollment ID: O20040622001247
Entity NameOSF Multi-specialty Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1922445527
PECOS PAC ID: 3678889789
Enrollment ID: O20150904000279

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. Matthew William Stier 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
Matthew William Stier, MD
22285 N Pepper Rd Ste 311,
Lake Barrington, IL 60010-2541

Ph: (847) 382-4410		Matthew William Stier, MD
22285 N Pepper Rd Ste 311,
Lake Barrington, IL 60010-2541

Ph: (847) 382-4410

Reviews and Comments


Internal Medicine Doctors in Lake Barrington, IL

Dr. Philip Nagel, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 22285 Pepper Rd., #311, Lake Barrington, IL 60010
Phone: 847-382-4410    Fax: 847-382-4451
Chad C Spangler, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 22285 N Pepper Rd, Suite #311, Lake Barrington, IL 60010
Phone: 847-382-4410    
Dr. Jordan Samuels, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 22285 N. Pepper Road, Lake Barrington, IL 60010
Phone: 847-882-6604    Fax: 847-882-6228
Carlos Zamudio, PA-C
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 22285 N Pepper Rd Ste 409, Lake Barrington, IL 60010
Phone: 847-382-7165    
Nicole M Gentile, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 22285 N Pepper Rd Ste 311, Lake Barrington, IL 60010
Phone: 847-382-4410    
Shahid B. Ilahi, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 22n285 Pepper Rd, Suite 303, Lake Barrington, IL 60010
Phone: 630-952-1412    
Dr. Manish B. Bhuva, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 22285 Pepper Rd., #311, Lake Barrington, IL 60010
Phone: 847-382-4410    Fax: 847-382-4451

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.