NPIMap

Individual provider Active NPI

Syed Ommar Hassan, MD

  • Family Medicine Physician
  • McHenry, IL
National Provider Identifier
1063637544
Registry record updated May 12, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
036133790 Issued in IL
Practice address
3922 Mercy Dr
McHenry, IL 60050-3179
Phone
(815) 344-4499
Fax
(815) 344-4779
NPI assigned
Apr 17, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 12, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Geriatric Medicine (Family Medicine) Physician 207QG0300X 036133790 IL
Family Medicine Physician 207Q00000X 036133790 IL Primary
Family Medicine Physician 207Q00000X 57012414 OH
Urgent Care Clinic/Center 261QU0200X 036133790 IL

Addresses

Primary practice location

3922 Mercy Dr
McHenry, IL 60050-3179

Mailing address

29624 Network PL
Chicago, IL 60673-1296
Phone (815) 344-4499

Other practice location 1

875 S. Route 31
Crystal Lake, IL 60014
Phone (779) 220-5500

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20131021001358 IL Practitioner - Family PracticePractitioner - Geriatric Medicine 7517013154 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family PracticeAlso: Geriatric Medicine
Education
Other, 1998
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Mercy Health System CorporationGroup PAC ID 7416860440, 749 clinicians

Practice addresses (Care Compare)

3922 Mercy Dr
McHenry, IL 60050-3179
Phone (815) 344-4499

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal or shaving of skin growth1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
57012414OHMDFamily Medicine Physician
036133790ILMDGeriatric Medicine (Family Medicine) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mercy Harvard Hospital Inc CurrentSince Dec 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Jul 16, 2014 Accepting new patients
Mercy Harvard Hospital Inc CurrentSince Dec 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Jul 16, 2014 Accepting new patients
Mercy Health System Corporation Past Accepting new patients

Locations

29624 Network Pl
Chicago, IL 60673
Phone (608) 741-7652

875 S State Route 31
Crystal Lake, IL 60014
Phone (779) 220-5500

901 Grant St
Harvard, IL 60033
Phone (815) 943-5431

348 S Division St
Harvard, IL 60033
Phone (815) 943-1122

3922 Mercy Dr
McHenry, IL 60050
Phone (815) 344-4499

2000 Lake Ave
Woodstock, IL 60098
Phone (815) 337-4116

Interoperability endpoints

  • Direct secure messaging: shassan27829@direct.mhemail.org

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 10

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1176768000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778544000000",
    "number": "1063637544",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "29624 NETWORK PL",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606731296",
            "telephone_number": "815-344-4499",
            "fax_number": "815-344-4779"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3922 MERCY DR",
            "city": "MCHENRY",
            "state": "IL",
            "postal_code": "600503179",
            "telephone_number": "815-344-4499",
            "fax_number": "815-344-4779"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "875 S. Route 31",
            "address_purpose": "LOCATION",
            "city": "Crystal Lake",
            "state": "IL",
            "postal_code": "60014",
            "country_code": "US",
            "telephone_number": "779-220-5500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HASSAN",
        "first_name": "SYED",
        "middle_name": "OMMAR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-04-17",
        "last_updated": "2026-05-12",
        "certification_date": "2026-05-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207QG0300X",
            "taxonomy_group": "",
            "desc": "Family Medicine, Geriatric Medicine",
            "state": "IL",
            "license": "036133790",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "IL",
            "license": "036133790",
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "OH",
            "license": "57012414",
            "primary": false
        },
        {
            "code": "261QU0200X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Urgent Care",
            "state": "IL",
            "license": "036133790",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in McHenry, IL

Sources for this page

Verify at the official NPI Registry.