Dr Seng M Leong, MD - Medicare Internal Medicine in Barrington, IL

Dr Seng M Leong, MD is a medicare enrolled "Internal Medicine" physician in Barrington, Illinois. He graduated from medical school in 1969 and has 55 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Advocate Health And Hospitals Corporation and his current practice location is 27750 W Highway 22, Barrington, Illinois. You can reach out to his office (for appointments etc.) via phone at (847) 381-5800.

Dr Seng M Leong is licensed to practice in Illinois (license number 036-055809) 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 1487750790.

Contact Information

Dr Seng M Leong, MD
27750 W Highway 22,
Barrington, IL 60010-2379
(847) 381-5800
(847) 381-5873

Map and Direction




Physician's Profile

Full NameDr Seng M Leong
GenderMale
SpecialityInternal Medicine
Experience55 Years
Location27750 W Highway 22, 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:
  • Dr Seng M Leong graduated from medical school in 1969
  NPI Data:
  • NPI Number: 1487750790
  • Provider Enumeration Date: 09/15/2006
  • Last Update Date: 12/27/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 8022151083
  • Enrollment ID: I20100130000127

Medical Identifiers

Medical identifiers for Dr Seng M Leong such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1487750790NPI-NPPES
110209671OtherILRAILROAD MEDICARE
L96137OtherILMEDICARE ID
CH2241OtherILRAIL ROAD MEDICARE GROUP
03655809MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 036-055809 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Advocate Home Health Care ServLombard, ILHome health agency
Continental Home Health Care, IncWillowbrook, ILHome health agency
Advocate Good Shepherd HospitalBarrington, ILHospital
Northwestern Medicine Mchenry HospitalMchenry, ILHospital
Advocate Illinois Masonic Medical CenterChicago, ILHospital
Advocate Sherman HospitalElgin, ILHospital
Advocate Condell Medical CenterLibertyville, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Advocate Health And Hospitals Corporation78108009352422

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. Dr Seng M Leong allows following entities to bill medicare on his behalf.
Entity NameAdvocate Health And Hospitals Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700824455
PECOS PAC ID: 7810800935
Enrollment ID: O20031106000064

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. Dr Seng M Leong 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
Dr Seng M Leong, MD
27750 W Il Route 22 Ste 240,
Barrington, IL 60010-1924

Ph: (847) 381-5800
Dr Seng M Leong, MD
27750 W Highway 22,
Barrington, IL 60010-2379

Ph: (847) 381-5800

Reviews and Comments


Internal Medicine Doctors in Barrington, IL

Dr. Avani Tushar Mehta, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 27750 W Highway 22 Ste 110, Barrington, IL 60010
Phone: 847-381-4491    Fax: 847-381-4498
Dr. Jeffrey H Freihage, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 27750 W Highway 22 Ste 240, Barrington, IL 60010
Phone: 815-206-5700    Fax: 847-382-1771
Dr. Kristine Marie Young, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 426 N Hough St, Barrington, IL 60010
Phone: 847-304-6900    Fax: 847-304-6871
Dr. Michael B Soble, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 27750 W Highway 22, Suite G80, Barrington, IL 60010
Phone: 847-842-0850    Fax: 847-842-0357
Dr. Donald F Cronin, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 27750 W Highway 22, Suite 120, Barrington, IL 60010
Phone: 847-655-7264    Fax: 847-655-7262
Stacey L Mckelvey, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 200 Fox Glen Ct, Barrington, IL 60010
Phone: 847-382-7165    Fax: 847-713-8160
Jennifer Louise Vakharia, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1020 S Grove Ave, Barrington, IL 60010
Phone: 630-712-6373    

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.