Mark D Diamond, DO - Medicare Internal Medicine in Joliet, IL

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Mark D Diamond, DO is a medicare enrolled "Hospitalist" physician in Joliet, Illinois. He went to Chicago College Of Osteopathy and graduated in 1993 and has 31 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Dupage Medical Group Ltd and his current practice location is 2100 Glenwood Ave, Joliet, Illinois. You can reach out to his office (for appointments etc.) via phone at (815) 725-2121.

Mark D Diamond is licensed to practice in Illinois (license number 036091440) 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 1265402804.

Contact Information

Mark D Diamond, DO
2100 Glenwood Ave,
Joliet, IL 60435-5487
(815) 725-2121
(815) 744-3117

Map and Direction




Physician's Profile

Full NameMark D Diamond
GenderMale
SpecialityInternal Medicine
Experience31 Years
Location2100 Glenwood Ave, Joliet, 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:
  • Mark D Diamond attended and graduated from Chicago College Of Osteopathy in 1993
  NPI Data:
  • NPI Number: 1265402804
  • Provider Enumeration Date: 01/25/2006
  • Last Update Date: 08/07/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 9537143474
  • Enrollment ID: I20070728000051

Medical Identifiers

Medical identifiers for Mark D Diamond such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1265402804NPI-NPPES
036091440MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 036091440 (Illinois)Secondary
208M00000XHospitalist 036091440 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Palos Community HospitalPalos heights, ILHospital
Silver Cross Hospital And Medical CentersNew lenox, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Dupage Medical Group Ltd54966679411186

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. Mark D Diamond allows following entities to bill medicare on his behalf.
Entity NameDupage Medical Group Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801833983
PECOS PAC ID: 5496667941
Enrollment ID: O20031110000535
Entity NameBest Practices Inpatient Care, Ltd.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1619913522
PECOS PAC ID: 5799687372
Enrollment ID: O20040123000525

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. Mark D Diamond 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
Mark D Diamond, DO
Po Box 713260,
Chicago, IL 60677-1260

Ph: (630) 469-9200		Mark D Diamond, DO
2100 Glenwood Ave,
Joliet, IL 60435-5487

Ph: (815) 725-2121

Reviews and Comments


Hospitalist Doctors in Joliet, IL

Dr. Sarfaraz Haque, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 2100 Glenwood Ave, Joliet, IL 60435
Phone: 815-425-2121    
Dr. Margaret H Zabiega, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 2100 Glenwood Ave, Joliet, IL 60435
Phone: 815-725-2121    
Dr. Nitesh R Thakker, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 2100 Glenwood Ave, Joliet, IL 60435
Phone: 815-725-2121    Fax: 815-744-3117

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.