Nasser Janbay, M.D.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

25205 Issued in OK

Practice address

4401 McAuley Blvd Ste 2700
Oklahoma City, OK 73120-8565

Phone

(405) 751-4343

Fax

(405) 751-4346

NPI assigned

Aug 26, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in OK

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 1

Specialty

Hematology/OncologyAlso: Internal Medicine

Education

Other, 1985

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mercy Clinic Oklahoma CommunitiesGroup PAC ID 1153468921, 645 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Hospital Oklahoma City, Inc Hospital, Oklahoma City, OK, CCN 370013
• Mercy Hospital Kingfisher, Inc Hospital, Kingfisher, OK, CCN 371313
• Stormont Vail Hospital Hospital, Topeka, KS, CCN 170086
• Oklahoma Heart Hospital, LLC Hospital, Oklahoma City, OK, CCN 370215

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: njanbay134177@stormontvaildirect.org

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 Oklahoma Communities

  • Family Medicine Physician
  • Oklahoma City, OK
  • NPI 1386874550
  Medicare reassignment Care Compare group NPD
• Integris Ambulatory Care Corporation

  • Family Medicine Physician
  • Oklahoma City, OK
  • NPI 1750333936
  Medicare reassignment NPD
• Mercy Hospital Oklahoma City, Inc

  • Physical Therapist
  • Oklahoma City, OK
  • NPI 1922192186
  Medicare reassignment NPD
• Mercy Hospital Oklahoma City, Inc

  • Diagnostic Radiology Physician
  • Yukon, OK
  • NPI 1730326406
  NPD
• Mercy Hospital Ada, Inc

  • General Acute Care Hospital
  • Ada, OK
  • NPI 1952643306
  NPD (past)
• Mercy Hospital Oklahoma City, Inc

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1184721722
  NPD (past)
• Oklahoma Oncology & Hematology PC

  • Hematology & Oncology Physician
  • Tulsa, OK
  • NPI 1295785392
  NPD (past)
• Oklahoma Oncology and Hematology, P.C.

  • Hematology & Oncology Physician
  • Tulsa, OK
  • NPI 1972827046
  NPD (past)
• Summit Medical Center

  • General Acute Care Hospital
  • Edmond, OK
  • NPI 1356574560
  NPD (past)

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

• Mercy Hospital Kingfisher, Inc

  • Critical Access Hospital
  • Kingfisher, OK
  • NPI 1083048417
  Care Compare affiliation
• Mercy Hospital Oklahoma City, Inc

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1184721722
  Care Compare affiliation
• Oklahoma Heart Hospital, LLC

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1083617005
  Care Compare affiliation
• Stormont-Vail Healthcare Inc

  • General Acute Care Hospital
  • Topeka, KS
  • NPI 1194782409
  Care Compare affiliation

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

{
    "created_epoch": "1125014400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777507200000",
    "number": "1699768374",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 776084",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606776084"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4401 MCAULEY BLVD STE 2700",
            "city": "OKLAHOMA CITY",
            "state": "OK",
            "postal_code": "731208565",
            "telephone_number": "405-751-4343",
            "fax_number": "405-751-4346"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "JANBAY",
        "first_name": "NASSER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-08-26",
        "last_updated": "2026-04-30",
        "certification_date": "2026-04-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "KS",
            "license": "48471",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "OK",
            "license": "25205",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "790936711A",
            "state": "GA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Justesa Jamison
• Allison K Jamrok, M.A., C.F-SLP
• Hudia S Jamshed
• Joseph Sadayanand Jamullamudi, MD
• Jana Neufeld Counseling LLC
• Jane K Hudson MD PC
• Janet C. Barresi DDS
• Janet Fanning, MD PC
• Janet M. Spradlin, PH.D. PC
• Janice Leigh Kimball

• 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 Apr 30, 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.