NPIMap

Individual provider Active NPI

Omar Mohammed Siddiqui, DO

  • Hospitalist Physician
  • Chicago, IL
National Provider Identifier
1447833355
Registry record updated Oct 28, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
036180561 Issued in IL
Practice address
5145 N California Ave
Chicago, IL 60625-3661
Phone
(773) 989-3833
Fax
(773) 878-3753
NPI assigned
Apr 29, 2021
Last updated
Oct 28, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Oct 28, 2026

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

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Critical Care Medicine (Internal Medicine) Physician 207RC0200X 036180561 IL
Internal Medicine Physician 207R00000X OS023823 PA
Hospitalist Physician 208M00000X 036180561 IL Primary
Internal Medicine Physician 207R00000X 036180561 IL

Addresses

Primary practice location

5145 N California Ave
Chicago, IL 60625-3661

Mailing address

2650 Ridge Ave Ste 1223
Evanston, IL 60201-1700

Other practice location 1

600 Roe Ave
Elmira, NY 14905-1629
Phone (607) 737-4100

Other practice location 2

111 S Front St
Harrisburg, PA 17101-2010
Phone (717) 231-8772

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address osiddiqui274574@phsdirect.pinnaclehealth.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in PA
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
I20240617002053 PA Practitioner - Internal Medicine 2961945100 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Lake Erie College of Osteopathic Medicine, Erie, 2021
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
St Lukes Physician Group IncGroup PAC ID 6709798333, 2,161 clinicians
Pinnacle Health Hospitalist Services LLCGroup PAC ID 9739313545, 180 clinicians

Practice addresses (Care Compare)

360 W Riddle St
Coaldale, PA 18218-1027

4300 Londonderry Rd
Harrisburg, PA 17109-5317
Phone (717) 657-7332

801 Ostrm St
Bethlehem, PA 18015-1000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
OS023823PAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Pinnacle Health Hospitalist Services LLC Internal Medicine CurrentSince Jun 1, 2024 Accepting new patients
St Luke's Physician Group Inc Internal Medicine CurrentSince Jan 27, 2025 Accepting new patients
Gslpg, Inc CurrentSince Jan 27, 2025 Accepting new patients
St. Luke's Physician Group, Inc. Current Accepting new patients
St Luke's Physician Group Inc CurrentSince Jan 27, 2025 Accepting new patients
Upmc Pinnacle Hospitals Past Accepting new patients

Locations

801 Ostrum St
Fountain Hill, PA 18015
Phone (610) 954-2200

111 S Front St
Harrisburg, PA 17101
Phone (717) 782-3282

4300 Londonderry Rd
Lower Paxton, PA 17109
Phone (717) 597-7044

100 Paramount Blvd
Orwigsburg, PA 17961
Phone (272) 639-1000

Interoperability endpoints

  • Direct secure messaging: osiddiqui274574@phsdirect.pinnaclehealth.org
  • Direct secure messaging: osiddiqui433878@upmc.direct-ci.com

Organizations & group practices 6

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 14

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

View all 14

NPI Registry JSON

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

{
    "created_epoch": "1619654400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1793145600000",
    "number": "1447833355",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2650 RIDGE AVE STE 1223",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602011700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5145 N CALIFORNIA AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606253661",
            "telephone_number": "773-989-3833",
            "fax_number": "773-878-3753"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "600 Roe Ave",
            "address_purpose": "LOCATION",
            "city": "Elmira",
            "state": "NY",
            "postal_code": "149051629",
            "country_code": "US",
            "telephone_number": "607-737-4100",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "111 S Front St",
            "address_purpose": "LOCATION",
            "city": "Harrisburg",
            "state": "PA",
            "postal_code": "171012010",
            "country_code": "US",
            "telephone_number": "717-231-8772",
            "fax_number": "717-231-8435",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIDDIQUI",
        "first_name": "OMAR",
        "middle_name": "MOHAMMED",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-04-29",
        "last_updated": "2026-10-28",
        "certification_date": "2026-10-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "IL",
            "license": "036180561",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "OS023823",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "IL",
            "license": "036180561",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036180561",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "osiddiqui274574@phsdirect.pinnaclehealth.org",
            "affiliation": "N",
            "address_1": "111 S Front St",
            "city": "Harrisburg",
            "state": "PA",
            "country_code": "US",
            "postal_code": "171012010",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Chicago, IL

Sources for this page

Verify at the official NPI Registry.