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

Last updated

Jan 5, 2026By the provider in NPPES

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

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 TrustGroup PAC ID 5496659195, 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 enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wdierenfeldt21116@stormontvaildirect.org

All facility ownership & control disclosures 1

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

Owned or controlled facilities with NPI records 1

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

• Manhattan Surgical Hospital LLC

  dba Manhattan Surgical Hospital

  • Special Hospital
  • Manhattan, KS
  • NPI 1629053228

  General Partnership Interest

  CMS ownership

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

• Cotton-O'Neil Clinic Revocable Trust

  dba Cotton O'Neil

  • Internal Medicine Physician
  • Topeka, KS
  • NPI 1811944457

  Gastroenterology

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

  dba Stormont Vail Health Flint Hills

  • Emergency Medicine Physician
  • Junction City, KS
  • NPI 1447968128
  Medicare reassignment NPD
• Cotton-O'Neil Clinic Revocable Trust

  dba Stormont Vail Health DME

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

  dba Stormont Vail Health Flint Hills Lab

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

  dba Stormont Vail Health Flint Hills

  • 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
  Care Compare affiliation
• Clay County Medical Center

  • Critical Access Hospital
  • Clay Center, KS
  • NPI 1265485817
  Care Compare affiliation
• Community Memorial Healthcare, Inc.

  • Critical Access Hospital
  • Marysville, KS
  • NPI 1902872997
  Care Compare affiliation
• Manhattan Surgical Hospital LLC

  dba Manhattan Surgical Hospital

  • Special Hospital
  • Manhattan, KS
  • NPI 1629053228
  Care Compare affiliation
• Stormont Vail Health Flint Hills LLC

  dba Stormont Vail Health Flint Hills

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

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

{
    "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": []
}

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• Kayla Rose Dieball, APRN
• Shannon R. Diederich-Akins
• Madison Brooke Diederich, LMSW
• Felicia Dierksen, RD
• Lynn Difede, PT, DPT
• Mackenzie Erin Dikeman, MD
• Dillon Companies LLC (Dillon Pharmacy)
• Dillon Companies LLC (Dillon Pharmacy)

• Gastroenterology Physician in Manhattan, KS
• Providers in Manhattan, KS by specialty
• 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.