NPIMap

Individual provider Active NPI

William C. Kramer, M.D.

  • Orthopaedic Surgery Physician
  • Boulder, CO
National Provider Identifier
1093978223
Registry record updated Feb 26, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Orthopaedic Surgery PhysicianTaxonomy code 207X00000X
License
DR0053611 Issued in CO
Practice address
4740 Pearl Pkwy Ste 200
Boulder, CO 80301-3080
Phone
(303) 449-2730
Fax
(303) 449-5821
NPI assigned
Jul 8, 2008
Last updated
Feb 26, 2026By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Feb 26, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Orthopaedic Surgery Physician 207X00000X DR0053611 CO Primary
Orthopaedic Surgery Physician 207X00000X 94-06920 KS

Addresses

Primary practice location

4740 Pearl Pkwy Ste 200
Boulder, CO 80301-3080

Mailing address

4740 Pearl Pkwy Ste 200
Boulder, CO 80301-3080
Phone (303) 449-2730

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20141219000256 CO Practitioner - Orthopedic Surgery 9537393764 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Orthopedic Surgery
Education
Other, 2008
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Wray Community District HospitalGroup PAC ID 3274425038, shared by 4 NPIs, 31 clinicians
Select Physical Therapy of West Denver Limited PartnershipGroup PAC ID 6709771157, shared by 5 NPIs, 530 clinicians
Bouldercentre for Orthopedics PCGroup PAC ID 3971409020, 56 clinicians

Practice addresses (Care Compare)

1017 W 7TH St
Wray, CO 80758-1420
Phone (970) 332-4811

2964 Ginnala Dr
Loveland, CO 80538-2701
Phone (970) 667-7755

4740 Pearl Pkwy
Suite 200
Boulder, CO 80301-3080
Phone (303) 449-2730

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Knee replacement1-10
Lower limb (leg) arthroscopy (minimally invasive joint repair)18
Removal of tissue1-10
Removal of nail tissue1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
DR0053611COMDOrthopaedic Surgery Physician
94-06920KSMDOrthopaedic Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Wray Community District Hospital CurrentSince Jul 5, 2018 Accepting new patients
Bouldercentre for Orthopedics PC Orthopaedic Surgery CurrentSince Sep 14, 2015 Accepting new patients
Wray Community District Hospital CurrentSince Jul 5, 2018 Accepting new patients
Colorado Orthopaedics PC Orthopaedic Surgery Past Accepting new patients
Broomfield Orthopedic Surgery Center, LLC PastSince May 21, 2023 Accepting new patients
Bouldercentre for Orthopedics Orthopaedic Surgery PastSince Feb 11, 2024 Accepting new patients

Locations

4740 Pearl Pkwy
Ste 200
Boulder, CO 80301
Phone (303) 449-2730

933 Alpine Ave
Boulder, CO 80304
Phone (303) 444-0378

1185 State Highway 7
Broomfield, CO 80023
Phone (303) 449-2730

1185 State Highway 7
Ste 200
Broomfield, CO 80023
Phone (303) 449-2730

1017 W 7th St
Wray, CO 80758
Phone (970) 332-4811

700 Main St
Wray, CO 80758
Phone (970) 332-3450

Interoperability endpoints

  • FHIR API: https://api.platform.athenahealth.com/16409/brand/1/csg/1/fhir/r4
  • FHIR API: https://api.platform.athenahealth.com/3497/brand/1/csg/21/fhir/r4
  • FHIR API: https://fhir-myrecord.cerner.com/r4/ntTIZxOIDS2tB2PUqr33FYQo0UWd2W9R/
  • Direct secure messaging: william.kramer.1@3497.direct.athenahealth.com

Organizations & group practices 6

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.

Hospital & facility affiliations 36

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

View all 36

NPI Registry JSON

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

{
    "created_epoch": "1215475200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772064000000",
    "number": "1093978223",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4740 PEARL PKWY STE 200",
            "city": "BOULDER",
            "state": "CO",
            "postal_code": "803013080",
            "telephone_number": "303-449-2730",
            "fax_number": "303-449-5821"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4740 PEARL PKWY STE 200",
            "city": "BOULDER",
            "state": "CO",
            "postal_code": "803013080",
            "telephone_number": "303-449-2730",
            "fax_number": "303-449-5821"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KRAMER",
        "first_name": "WILLIAM",
        "middle_name": "C.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2008-07-08",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CO",
            "license": "DR0053611",
            "primary": true
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "KS",
            "license": "94-06920",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boulder, CO

Sources for this page

Verify at the official NPI Registry.