Mason James Webb, MD, PHD

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

45945 Issued in OK

Practice address

800 NE 10TH St Ste B
Oklahoma City, OK 73104-5418

Phone

(572) 244-0111

Fax

(572) 244-9984

NPI assigned

Mar 22, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in MN, OK2 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

Hematology/OncologyAlso: Internal Medicine

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mayo ClinicGroup PAC ID 6507778255, 4,829 clinicians

Ou Health Partners IncGroup PAC ID 5991105876, 1,167 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• O U Medical Center Hospital, Oklahoma City, OK, CCN 370093
• Mayo Clinic Hospital Rochester Hospital, Rochester, MN, CCN 240010
• Mayo Clinic Health System - Cannon Falls Hospital, Cannon Falls, MN, CCN 241346

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

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.

• Ou Health Partners, Inc

  dba Ou Health Partners

  • Multi-Specialty Clinic/Center
  • Oklahoma City, OK
  • NPI 1528642642
  Medicare reassignment Care Compare group NPD
• Mayo Clinic

  • Multi-Specialty Clinic/Center
  • Rochester, MN
  • NPI 1922074434
  Medicare reassignment Care Compare group NPD
• Mayo Clinic Health System-Southeast Minnesota Region

  dba Mayo Clinic Health System-Albert Lea and Austin

  • Multi-Specialty Clinic/Center
  • Albert Lea, MN
  • NPI 1891701637
  Medicare reassignment NPD
• Mayo Clinic Health System-Southwest Minnesota Region

  dba Mayo Clinic Health System - Mankato

  • Multi-Specialty Clinic/Center
  • Mankato, MN
  • NPI 1578545422
  Medicare reassignment NPD
• Ou Health Partners, Inc

  dba OUHP Orthotics & Prosthetic

  • Prosthetic/Orthotic Supplier
  • Oklahoma City, OK
  • NPI 1447834460
  NPD
• Mayo Clinic

  • Clinical Medical Laboratory
  • Rochester, MN
  • NPI 1083249577
  NPD
• Mayo Clinic Health System-Southeast Minnesota Region

  dba Mayo Clinic Health System-Red Wing

  • Multi-Specialty Clinic/Center
  • Red Wing, MN
  • NPI 1114453883
  NPD
• Mayo Clinic Health System-Southeast Minnesota Region

  dba Mayo Clinic Health System Pharmacy - Cannon Falls

  • Clinic Pharmacy
  • Cannon Falls, MN
  • NPI 1699597468
  NPD
• Mayo Clinic Health System-Southwest Minnesota Region

  dba Mayo Clinic Health System-New Prague

  • Multi-Specialty Clinic/Center
  • New Prague, MN
  • NPI 1477089407
  NPD
• Mayo Clinic Health System-Southwest Minnesota Region

  dba Mayo Clinic Health System-Waseca

  • Multi-Specialty Clinic/Center
  • Waseca, MN
  • NPI 1518494251
  NPD
• Floyd County Memorial Hospital Commission

  • Critical Access Hospital
  • Charles City, IA
  • NPI 1265402390
  NPD (past)

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

• Ou Medicine Inc.

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1649794157
  Care Compare affiliation
• Mayo Clinic Health System-Southeast Minnesota Region

  dba Mayo Clinic Health System-Cannon Falls

  • Critical Access Hospital
  • Cannon Falls, MN
  • NPI 1063435410
  Care Compare affiliation
• Mayo Clinic Hospital-Rochester

  • General Acute Care Hospital
  • Rochester, MN
  • NPI 1841266194
  Care Compare affiliation

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

{
    "created_epoch": "1553212800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782950400000",
    "number": "1306306600",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "800 NE 10TH ST STE B",
            "city": "OKLAHOMA CITY",
            "state": "OK",
            "postal_code": "731045418",
            "telephone_number": "572-244-0111",
            "fax_number": "572-244-9984"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "800 NE 10TH ST STE B",
            "city": "OKLAHOMA CITY",
            "state": "OK",
            "postal_code": "731045418",
            "telephone_number": "572-244-0111",
            "fax_number": "572-244-9984"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "200 1st St SW",
            "address_purpose": "LOCATION",
            "city": "Rochester",
            "state": "MN",
            "postal_code": "559050001",
            "country_code": "US",
            "telephone_number": "507-284-2511",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WEBB",
        "first_name": "MASON",
        "middle_name": "JAMES",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-22",
        "last_updated": "2026-07-02",
        "certification_date": "2026-07-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MN",
            "license": "67817",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "OK",
            "license": "45945",
            "primary": true
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "MN",
            "license": "67817",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kayla Webb
• Kindle Brooke Webb
• Laura Jean Webb, M.D.
• Leonard Webb Jr.
• Lisa L Webb
• Matthew Thomas Webb, IDMT
• Olivia Lauren Webb, MD
• Samarea Denise Webb, APRN
• Sheila Dawn Webb
• Sheldon Webb

• Hematology & Oncology Physician in Oklahoma City, OK
• Providers in Oklahoma City, OK by specialty
• Hematology & Oncology Physician in Oklahoma

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 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.