John K Ma, MD, PHD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

04 37990 Issued in KS

Practice address

1414 SW 8TH Ave
Topeka, KS 66606-1535

Phone

(785) 354-5300

NPI assigned

Jul 31, 2009

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

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in KS

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

Radiation Oncology

Education

University of Mississippi School of Medicine, 2009

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cotton-O'Neil Clinic Revocable TrustGroup PAC ID 5496659195, 659 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stormont Vail Hospital Hospital, Topeka, KS, CCN 170086
• University of Kansas Health System - St Francis Campus Hospital, Topeka, KS, CCN 170016
• University of Kansas Hospital Hospital, Kansas City, KS, CCN 170040

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jma31335@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.

• Cotton-O'Neil Clinic Revocable Trust

  • Internal Medicine Physician
  • Topeka, KS
  • NPI 1811944457
  Medicare reassignment Care Compare group NPD
• Olathe Health Physicians, Inc.

  • Family Medicine Physician
  • Olathe, KS
  • NPI 1598784639
  Medicare reassignment NPD
• Radiology and Nuclear Medicine LLC

  • Diagnostic Radiology Physician
  • Topeka, KS
  • NPI 1699733162

  Radiation Oncology

  Medicare reassignment NPD
• Cotton-O'Neil Clinic Revocable Trust

  • Durable Medical Equipment & Medical Supplies
  • Topeka, KS
  • NPI 1700076015
  NPD

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

• Stormont-Vail Healthcare Inc

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

  • General Acute Care Hospital
  • Topeka, KS
  • NPI 1912423260
  Care Compare affiliation
• University of Kansas Hospital Authority

  • General Acute Care Hospital
  • Kansas City, KS
  • NPI 1629369681
  Care Compare affiliation
• University of Kansas Hospital Authority

  • General Acute Care Hospital
  • Kansas City, KS
  • NPI 1649259656
  Care Compare affiliation

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

{
    "created_epoch": "1248998400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770940800000",
    "number": "1205067758",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1414 SW 8TH AVE",
            "city": "TOPEKA",
            "state": "KS",
            "postal_code": "666061535",
            "telephone_number": "785-354-5300"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1414 SW 8TH AVE",
            "city": "TOPEKA",
            "state": "KS",
            "postal_code": "666061535",
            "telephone_number": "785-354-5300"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1500 SW 10th Ave",
            "address_purpose": "LOCATION",
            "city": "Topeka",
            "state": "KS",
            "postal_code": "666041301",
            "country_code": "US",
            "telephone_number": "785-624-6000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MA",
        "first_name": "JOHN",
        "middle_name": "K",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-07-31",
        "last_updated": "2026-02-13",
        "certification_date": "2026-02-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "KS",
            "license": "04 37990",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jma31335@stormontvaildirect.org",
            "affiliation": "Y",
            "endpointDescription": "SVH Secure messaging",
            "affiliationName": "COTTON O'NEIL CLINIC REVOCABLE TRUST",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CCDA",
            "address_1": "1414 SW 8th Ave",
            "city": "Topeka",
            "state": "KS",
            "country_code": "US",
            "postal_code": "666061535",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jma31335@stormontvaildirect.org",
            "affiliation": "Y",
            "endpointDescription": "SVH Secure messaging",
            "affiliationName": "STORMONT-VAIL HEALTHCARE INC",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CCDA",
            "address_1": "1414 SW 8th Ave",
            "city": "Topeka",
            "state": "KS",
            "country_code": "US",
            "postal_code": "666061535",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

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• Sarah Elizabeth Lyon, M.S., LMFT
• Madison McKenzie Lysaught, DPT
• Melissa Mac, APRN, RN
• Chris Macdonald, LMSW
• Suzanne F Macdonald
• Mary Renee Maceli, PHARM.D.
• Jo A Mach, OT

• Radiation Oncology Physician in Topeka, KS
• Providers in Topeka, KS by specialty
• Radiation Oncology Physician in Kansas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 13, 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.