Mark A. Siemer, D.O.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

DR.0034732 Issued in CO

Practice address

13445 Voyager Pkwy
Colorado Springs, CO 80921-7648

Phone

(719) 365-3220

Fax

(719) 365-7681

NPI assigned

Jan 26, 2007

Last updated

Oct 30, 2025By the provider in NPPES

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CO

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

Family Practice

Education

Nova Southeastern College of Osteo Medicine, 1994

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Catholic Health Initiatives ColoradoGroup PAC ID 8022927342, 1,230 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• St Anthony Summit Medical Center Hospital, Frisco, CO, CCN 060118

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Catholic Health Initiatives Colorado

  dba Ctsa Cardiac Thor Surg

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Colorado Springs, CO
  • NPI 1356783351
  Medicare reassignment Care Compare group NPD
• Poudre Valley Medical Group, LLC

  dba UCHealth Medical Group

  • General Practice Physician
  • Loveland, CO
  • NPI 1225356868
  Medicare reassignment NPD
• Catholic Health Initiatives Colorado

  dba PRFS PC Frisco

  • Family Medicine Physician
  • Frisco, CO
  • NPI 1093326357
  NPD
• Catholic Health Initiatives Colorado

  dba CommonSpirit Orthopedics Longmont

  • Orthopaedic Surgery Physician
  • Longmont, CO
  • NPI 1891675294
  NPD
• Poudre Valley Medical Group, LLC

  dba UCHealth Medical Group

  • General Practice Physician
  • Loveland, CO
  • NPI 1366763260
  NPD
• Catholic Health Initiatives Colorado

  dba NSSH Neurosurg Sah

  • Neurological Surgery Physician
  • Lakewood, CO
  • NPI 1205846664
  NPD (past)
• Highlands Ranch Healthcare LLC

  dba MedExpress Urgent Care - Longmont, S Main St

  • Urgent Care Clinic/Center
  • Longmont, CO
  • NPI 1720500879
  NPD (past)
• Trinidad Area Health Association

  dba Mt. San Rafael Hospital Clinic

  • Family Medicine Physician
  • Trinidad, CO
  • NPI 1467400309
  NPD (past)
• Redimed Dekalb LLC

  • General Practice Physician
  • Auburn, IN
  • NPI 1669417457
  NPD (past)
• St. Joseph Health System, LLC

  dba Lutheran Downtown Hospital

  • Medicare Defined Swing Bed Hospital Unit
  • Fort Wayne, IN
  • NPI 1538812946
  NPD (past)

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

• Catholic Health Initiatives Colorado

  dba St. Anthony Summit Hospital

  • General Acute Care Hospital
  • Frisco, CO
  • NPI 1720096092
  Care Compare affiliation

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

{
    "created_epoch": "1169769600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761782400000",
    "number": "1871649368",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "13445 VOYAGER PKWY",
            "city": "COLORADO SPRINGS",
            "state": "CO",
            "postal_code": "809217648",
            "telephone_number": "719-365-3220",
            "fax_number": "719-365-7681"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "13445 VOYAGER PKWY",
            "city": "COLORADO SPRINGS",
            "state": "CO",
            "postal_code": "809217648",
            "telephone_number": "719-365-3220",
            "fax_number": "719-365-7681"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "13445 Voyager Pkwy",
            "address_purpose": "LOCATION",
            "city": "Colorado Springs",
            "state": "CO",
            "postal_code": "809217648",
            "country_code": "US",
            "telephone_number": "719-365-3220",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8420 University Exec Park Dr Ste 850",
            "address_purpose": "LOCATION",
            "city": "Charlotte",
            "state": "NC",
            "postal_code": "28262",
            "country_code": "US",
            "telephone_number": "704-316-1750",
            "fax_number": "704-316-1755",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "130 Plantation Ridge Dr Ste 100",
            "address_purpose": "LOCATION",
            "city": "Mooresville",
            "state": "NC",
            "postal_code": "281179239",
            "country_code": "US",
            "telephone_number": "704-316-1635",
            "fax_number": "704-316-1636",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8420 University Exec Park Dr Ste 850",
            "address_purpose": "LOCATION",
            "city": "Charlotte",
            "state": "NC",
            "postal_code": "28262",
            "country_code": "US",
            "telephone_number": "704-316-1750",
            "fax_number": "704-316-1755",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4707 S Helena Way",
            "address_purpose": "LOCATION",
            "city": "Aurora",
            "state": "CO",
            "postal_code": "80015",
            "country_code": "US",
            "telephone_number": "720-326-5032",
            "fax_number": "303-693-8076",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "265 Tanglewood Ln",
            "address_2": "Ste E-1",
            "address_purpose": "LOCATION",
            "city": "Silverthorne",
            "state": "CO",
            "postal_code": "804985314",
            "country_code": "US",
            "telephone_number": "970-468-1003",
            "fax_number": "970-262-2196",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8420 University Exec Park Dr Ste 850",
            "address_purpose": "LOCATION",
            "city": "Charlotte",
            "state": "NC",
            "postal_code": "28262",
            "country_code": "US",
            "telephone_number": "704-316-1750",
            "fax_number": "704-316-1755",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4707 S Helena Way",
            "address_purpose": "LOCATION",
            "city": "Aurora",
            "state": "CO",
            "postal_code": "80015",
            "country_code": "US",
            "telephone_number": "720-326-5032",
            "fax_number": "303-693-8076",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIEMER",
        "first_name": "MARK",
        "middle_name": "A.",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-01-26",
        "last_updated": "2025-10-30",
        "certification_date": "2025-10-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "NC",
            "license": "2005-00115",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CO",
            "license": "DR.0034732",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "msiemer692415@direct.novanthealth.org",
            "affiliation": "N",
            "address_1": "4707 S Helena Way",
            "city": "Aurora",
            "state": "CO",
            "country_code": "US",
            "postal_code": "80015",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Justin A Siegel
• Mindy Siegel, MD
• Shelly Sieligowski, LSW
• Henry Siem, M.D.
• Fulufhelo Siema
• Adrian Sierra
• Nancy Gail Siever, MA, PSYCHOTHERAPIST
• Daniel Sigars, D.C.
• Daniel Sigel
• Dudley M. Sigler, M.A.,L.M.F.T.

• Family Medicine Physician in Colorado Springs, CO
• Providers in Colorado Springs, CO by specialty
• Family Medicine Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 30, 2025; 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.