Timothy F Ahern, APRN, CRNA

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

1564 Issued in MN

Practice address

200 1St St SW
Rochester, MN 55905-0001

Phone

(507) 284-2511

NPI assigned

Feb 16, 2006

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

Medicare fee-for-service enrollment

Enrolled in MN

Enrollment records 1

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Olmsted Medical Center 324 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Olmsted Medical Center Hospital, Rochester, MN, CCN 240006

Medicare enrollment (NPD)

Enrolled

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.

• Olmsted Medical Center

  • Clinic/Center
  • Rochester, MN
  • NPI 1952356297

  MN

  Medicare reassignment Care Compare group NPD
• Mayo Clinic

  • Multi-Specialty Clinic/Center
  • Rochester, MN
  • NPI 1922074434

  MN

  Medicare reassignment NPD
• Olmsted Medical Center

  • General Acute Care Hospital
  • Rochester, MN
  • NPI 1538112131
  Care Compare group
• Olmsted Medical Center

  • Ambulatory Surgical Clinic/Center
  • Owatonna, MN
  • NPI 1851197859
  Care Compare group
• Mayo Clinic

  • Clinical Medical Laboratory
  • Rochester, MN
  • NPI 1083249577
  NPD
• Mayo Clinic

  • Infectious Disease Physician
  • Rochester, MN
  • NPI 1114343860
  NPD

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

{
    "created_epoch": "1140048000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772064000000",
    "number": "1114991908",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 1ST ST SW",
            "city": "ROCHESTER",
            "state": "MN",
            "postal_code": "559050001",
            "telephone_number": "507-284-2511"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 1ST ST SW",
            "city": "ROCHESTER",
            "state": "MN",
            "postal_code": "559050001",
            "telephone_number": "507-284-2511"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1650 4th St SE",
            "address_purpose": "LOCATION",
            "city": "Rochester",
            "state": "MN",
            "postal_code": "559044717",
            "country_code": "US",
            "telephone_number": "507-529-6600",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AHERN",
        "first_name": "TIMOTHY",
        "middle_name": "F",
        "credential": "APRN, CRNA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-02-16",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MN",
            "license": "R117898-6",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MN",
            "license": "1564",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Maria Ethel Aguirre Flores, M.D.
• Alicia Nicole Aguirre
• Eric Anthony Aguirre, NP-C
• Akochi O Agunwamba, MD
• John Agzarian, M.D.
• Lisa Jean Ahlberg, NP
• Barrett Ahle
• Casandra Lynn Ahle
• Heidi Jane Ahle, APRN, CRNA
• Mark J Ahle, CRNA

• All providers in Rochester, MN
• Certified Registered Nurse Anesthetist in Minnesota

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 26, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.