Gregory P. McLennan II, MD

Primary specialty

Urology PhysicianTaxonomy code 208800000X

License

2014009247 Issued in MO

Practice address

701 S. New Ballas Road, Suite 330
Saint Louis, MO 63141

Phone

(314) 251-8850

NPI assigned

Jul 9, 2008

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in MO, IL2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Urology

Education

Saint Louis University School of Medicine, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mercy Clinic Urology LLCGroup PAC ID 5395768253, 26 clinicians

Blessing HospitalGroup PAC ID 3072422534, 414 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Hospital St Louis Hospital, Saint Louis, MO, CCN 260020
• Blessing Hospital Hospital, Quincy, IL, CCN 140015
• Mercy Hospital South Hospital, Saint Louis, MO, CCN 260077
• Mercy Hospital Washington Hospital, Washington, MO, CCN 260052
• Mercy Hospital Lincoln Hospital, Troy, MO, CCN 261319

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gregorymclennan@blessing.allscriptsdirect.net
• FHIR API: https://fhir.blessinghospital.com/R4/open-Prod
• Direct secure messaging: gmclennan498817@directc.mercy.net

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

• Mercy Clinic Urology LLC

  • Urology Physician
  • Washington, MO
  • NPI 1669502274
  Medicare reassignment Care Compare group NPD
• Blessing Hospital

  • Multi-Specialty Clinic/Center
  • Quincy, IL
  • NPI 1114471737
  Medicare reassignment Care Compare group NPD
• Mercy Hospitals East Communities

  dba Mercy JFK Clinic

  • Clinic/Center
  • Saint Louis, MO
  • NPI 1851431738
  Medicare reassignment NPD
• Blessing Hospital

  dba Blessing Health Monroe City

  • Rural Health Clinic/Center
  • Monroe City, MO
  • NPI 1013683507
  NPD
• Mercy Hospitals East Communities

  dba Mercy St. Louis Transport Ambulance

  • Land Ambulance
  • Saint Louis, MO
  • NPI 1881329902
  NPD
• Blessing Hospital

  • General Acute Care Hospital
  • Quincy, IL
  • NPI 1760571699
  NPD
• Quincy Clinical Laboratory Services SC

  • Anatomic Pathology & Clinical Pathology Physician
  • Quincy, IL
  • NPI 1114773272
  NPD
• West Central Pathology Specialists, S.C.

  • Anatomic Pathology & Clinical Pathology Physician
  • Quincy, IL
  • NPI 1083895452
  NPD

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

• Mercy Hospital Lincoln

  • Critical Access Hospital
  • Troy, MO
  • NPI 1962808733
  Care Compare affiliation
• Mercy Hospital South

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1568481984
  Care Compare affiliation
• Mercy Hospitals East Communities

  dba Mercy Hospital Washington

  • General Acute Care Hospital
  • Washington, MO
  • NPI 1285664177
  Care Compare affiliation
• Mercy Hospitals East Communities

  dba Mercy Hospital St Louis

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1427098169
  Care Compare affiliation
• Mercy Hospitals East Communities

  dba Mercy St. Louis Transport Ambulance

  • Land Ambulance
  • Saint Louis, MO
  • NPI 1881329902

  Hospital

  Care Compare affiliation
• Blessing Hospital

  • Nurse Practitioner
  • Quincy, IL
  • NPI 1417204827

  Hospital

  Care Compare affiliation
• Blessing Hospital

  • General Acute Care Hospital
  • Quincy, IL
  • NPI 1760571699
  Care Compare affiliation

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

{
    "created_epoch": "1215561600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788307200000",
    "number": "1912160052",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "701 S. NEW BALLAS ROAD, SUITE 330",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "63141",
            "telephone_number": "314-251-8850"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "701 S. NEW BALLAS ROAD, SUITE 330",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "63141",
            "telephone_number": "314-251-8850"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "927 Broadway St",
            "address_purpose": "LOCATION",
            "city": "Quincy",
            "state": "IL",
            "postal_code": "623012719",
            "country_code": "US",
            "telephone_number": "217-223-8400",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1820 Zumbehl Rd Ste 120",
            "address_purpose": "LOCATION",
            "city": "Saint Charles",
            "state": "MO",
            "postal_code": "633032761",
            "country_code": "US",
            "telephone_number": "314-251-8850",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MCLENNAN",
        "first_name": "GREGORY",
        "middle_name": "P.",
        "name_suffix": "II",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-07-09",
        "last_updated": "2026-09-02",
        "certification_date": "2026-09-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "MO",
            "license": "2014009247",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P01366917",
            "state": "MO"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1912160052",
            "state": "MO"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Patrick McLean
• Alyssa McLellan, CPNP-PC
• Ann Ashford McLemore, MD
• Samantha McLemore, PHARMD
• Shonta Latrice McLemore, DOULA
• Mary T McLennan, MD
• Daniel Keith McLeod, ATC
• Michael Arthur McLeod, PH.D.
• Michelle Leigh McLeod, ACNP
• Jonathan Alan McMahan, PHARMD

• Urology Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Urology Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.