William Travis Dierenfeldt, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

04-28673 Issued in KS

Practice address

1325 Research Park Dr
Manhattan, KS 66502-5000

Phone

(785) 537-2651

NPI assigned

Jun 2, 2006

Sex

Male

Sole proprietor

No

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

  Gastroenterology, KS

  Medicare reassignment Care Compare group NPD
• Stormont Vail Health Flint Hills LLC

  • Emergency Medicine Physician
  • Junction City, KS
  • NPI 1447968128

  KS

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

  • Durable Medical Equipment & Medical Supplies
  • Topeka, KS
  • NPI 1700076015
  Care Compare group NPD
• Stormont Vail Health Flint Hills LLC

  • Clinical Medical Laboratory
  • Junction City, KS
  • NPI 1174308068
  NPD
• Stormont Vail Health Flint Hills LLC

  • Rural Health Clinic/Center
  • Junction City, KS
  • NPI 1952018608
  NPD

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

• Ascension Via Christi Hospital Manhattan, Inc.

  • General Acute Care Hospital
  • Manhattan, KS
  • NPI 1760482517

  Hospital

  Care Compare affiliation
• Clay County Medical Center

  • Critical Access Hospital
  • Clay Center, KS
  • NPI 1265485817

  Hospital

  Care Compare affiliation
• Community Memorial Healthcare, Inc.

  • Critical Access Hospital
  • Marysville, KS
  • NPI 1902872997

  Hospital

  Care Compare affiliation
• Manhattan Surgical Hospital LLC

  • Special Hospital
  • Manhattan, KS
  • NPI 1629053228

  Hospital

  Care Compare affiliation
• Stormont Vail Health Flint Hills LLC

  • General Acute Care Hospital
  • Junction City, KS
  • NPI 1679280192

  Hospital

  Care Compare affiliation

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

• Manhattan Surgical Hospital LLC

  • Special Hospital
  • Manhattan, KS
  • NPI 1629053228

  General Partnership Interest

  CMS ownership

Specialty

Gastroenterology

Education

University of Missouri, Kansas City, School of Medicine, 1994

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cotton-O'Neil Clinic Revocable Trust 659 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Manhattan Surgical Hospital LLC Hospital, Manhattan, KS, CCN 170190
• Ascension Via Christi Hospital Manhattan, Inc Hospital, Manhattan, KS, CCN 170142
• Stormont Vail Health Flint Hills, LLC Hospital, Junction City, KS, CCN 170074
• Community Memorial Healthcare, Inc. Hospital, Marysville, KS, CCN 171363
• Clay County Medical Center Hospital, Clay Center, KS, CCN 171371

Procedures performed for Medicare patients

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

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wdierenfeldt21116@stormontvaildirect.org

The complete NPPES record for this NPI in the NPI Registry API format, last updated by the provider on Jan 5, 2026.

{
    "created_epoch": "1149206400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767571200000",
    "number": "1477591634",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1325 RESEARCH PARK DR",
            "city": "MANHATTAN",
            "state": "KS",
            "postal_code": "665025000",
            "telephone_number": "785-537-2651",
            "fax_number": "785-539-0177"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1325 RESEARCH PARK DR",
            "city": "MANHATTAN",
            "state": "KS",
            "postal_code": "665025000",
            "telephone_number": "785-537-2651"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1102 Saint Marys Rd",
            "address_purpose": "LOCATION",
            "city": "Junction City",
            "state": "KS",
            "postal_code": "664414139",
            "country_code": "US",
            "telephone_number": "785-238-0325",
            "fax_number": "785-576-1113",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DIERENFELDT",
        "first_name": "WILLIAM",
        "middle_name": "TRAVIS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-02",
        "last_updated": "2026-01-05",
        "certification_date": "2026-01-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "KS",
            "license": "04-28673",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wdierenfeldt21116@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": "1014 Poyntz Ave Ste B",
            "city": "Manhattan",
            "state": "KS",
            "country_code": "US",
            "postal_code": "665026758",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wdierenfeldt21116@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": "1014 Poyntz Ave Ste B",
            "city": "Manhattan",
            "state": "KS",
            "country_code": "US",
            "postal_code": "665026758",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Diane Clark LLC
• Mary Page Diaz-Estabillo, LSCSW
• Kayla Rose Dieball, APRN
• Shannon R. Diederich-Akins
• Madison Brooke Diederich, LMSW
• Eric Dean Dierksen, D.C.
• Felicia Dierksen, RD
• Lynn Difede, PT, DPT
• Mackenzie Erin Dikeman, MD
• Dillon Companies LLC

• All providers in Manhattan, KS
• Gastroenterology Physician in Kansas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data; 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.