Dennis W Siemsen, OD

Primary specialty

OptometristTaxonomy code 152W00000X

License

2713 Issued in MN

Practice address

200 1St St SW
Rochester, MN 55905-0001

Phone

(507) 284-2511

NPI assigned

Dec 27, 2005

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

Medicare fee-for-service enrollment

Enrolled in MN, WI2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Optometry

Education

Illinois College of Optometry at Chicago, 1976

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mayo ClinicGroup PAC ID 6507778255, 4,829 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: dsiemsen28529@ehrdirect.mayoclinicmsg.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.

• Mayo Clinic

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

  Optometrist, WI

  Medicare reassignment Care Compare group 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": "1135641600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772064000000",
    "number": "1598742074",
    "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": [],
    "basic": {
        "last_name": "SIEMSEN",
        "first_name": "DENNIS",
        "middle_name": "W",
        "credential": "OD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-27",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "MN",
            "license": "2713",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Monica R Sieg, NP
• Robert Sieg, PHARM D
• Jacob James Siegert, D.D.S
• Emily Lin Siegler, MD
• Broc T Siems, CRNA
• Derek Siercks, PHARMD
• Rafael J Sierra, M.D.
• Ronald Michael Sieve, PHARMD.
• Alina Brooke Sievers, PA-C
• Ashley E Sievers, MD

• Optometrist in Rochester, MN
• Providers in Rochester, MN by specialty
• Optometrist 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; 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.