Gregg A. Koldenhoven, MD

Primary specialty

Orthopaedic Foot and Ankle Surgery PhysicianTaxonomy code 207XX0004X

License

DR.0039636 Issued in CO

Practice address

1610 Dry Creek Dr
Longmont, CO 80503-6405

Phone

(303) 772-1600

Fax

(970) 493-0521

NPI assigned

Jun 15, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

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

Orthopedic Surgery

Education

University of Iowa, RJ & L Carver College of Medicine, 1993

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Orthopaedic and Spine Center of the Rockies PCGroup PAC ID 0244126365, 145 clinicians

Select Physical Therapy Holdings IncGroup PAC ID 9537076401, shared by 76 NPIs, 1,992 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Alliant Home Health LLC Home health agency, Wesminster, CO, CCN 067181
• Longs Peak Hospital Hospital, Longmont, CO, CCN 060128
• Longmont United Hospital Hospital, Longmont, CO, CCN 060003
• Good Samaritan Medical Center LLC Hospital, Lafayette, CO, CCN 060116

Merit-based Incentive Payment System (MIPS)

Final score

74.72 of 100Reported as group

Quality

70.39

Promoting interoperability

71

Improvement activities

40

Cost

69.52

Merit-based Incentive Payment System (MIPS)

Final score

86.12 of 100Reported as group

Quality

74.76

Promoting interoperability

100

Improvement activities

40

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: greggkoldenhoven@fro.allscriptsdirect.net

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.

• Orthopaedic & Spine Center of the Rockies PC

  • Orthopaedic Surgery Physician
  • Fort Collins, CO
  • NPI 1770579385
  Medicare reassignment Care Compare group NPD

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

• Alliant Home Health, LLC

  • Home Health Agency
  • Westminster, CO
  • NPI 1548578685
  Care Compare affiliation Name & address match
• Good Samaritan Medical Center, LLC

  • General Acute Care Hospital
  • Lafayette, CO
  • NPI 1407845035
  Care Compare affiliation
• Longmont United Hospital

  • General Acute Care Hospital
  • Longmont, CO
  • NPI 1366465866
  Care Compare affiliation
• Longs Peak Hospital

  • General Acute Care Hospital
  • Longmont, CO
  • NPI 1154876985
  Care Compare affiliation

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

{
    "created_epoch": "1118793600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770249600000",
    "number": "1396740411",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2500 E PROSPECT RD",
            "city": "FORT COLLINS",
            "state": "CO",
            "postal_code": "805259718",
            "telephone_number": "970-493-0112",
            "fax_number": "970-493-0521"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1610 DRY CREEK DR",
            "city": "LONGMONT",
            "state": "CO",
            "postal_code": "805036405",
            "telephone_number": "303-772-1600",
            "fax_number": "970-493-0521"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "300 Exempla Cir Ste 200",
            "address_purpose": "LOCATION",
            "city": "Lafayette",
            "state": "CO",
            "postal_code": "800263391",
            "country_code": "US",
            "telephone_number": "303-772-1600",
            "fax_number": "303-772-9317",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "13559 Huron St Ste 201",
            "address_purpose": "LOCATION",
            "city": "Westminster",
            "state": "CO",
            "postal_code": "802341163",
            "country_code": "US",
            "telephone_number": "303-772-1600",
            "fax_number": "303-772-9317",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KOLDENHOVEN",
        "first_name": "GREGG",
        "middle_name": "A.",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-06-15",
        "last_updated": "2026-02-05",
        "certification_date": "2026-02-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207XS0114X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery, Adult Reconstructive Orthopaedic Surgery",
            "state": "CO",
            "license": "DR.0039636",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CO",
            "license": "DR0039636",
            "primary": false
        },
        {
            "code": "207XX0004X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery, Foot and Ankle Surgery",
            "state": "CO",
            "license": "DR.0039636",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Rachel M. Koenigsberg, C.C.HT.
• Christopher Andrew Koerber, DO
• Lisa Koets
• Sophia Koinis
• Michele Kolakowski, CD(DONA), RMT
• Bryant Koopmans
• Courtney Korban, CPM
• Katherine Colleen Korenek, RN
• Martin A Koschnitzke, MD
• Patricia E Kostoff, MA

• Orthopaedic Foot and Ankle Surgery Physician in Longmont, CO
• Providers in Longmont, CO by specialty
• Orthopaedic Foot and Ankle Surgery Physician in Colorado

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