Active NPI
William Crane Fix, MD
- Dermatology Physician
- Boulder, CO
National Provider Identifier
1063972040
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dermatology Physician
- License
- DR.0072825
- Practice address
- 3434 47TH St Ste 200
Boulder, CO 80301-1817 - Phone
- (303) 444-8100
- NPI assigned
- Mar 25, 2019
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Dermatology Physician | 207N00000X | A6000567 | KS | |
| Dermatology Physician | 207N00000X | DR.0072825 | CO | Primary |
Addresses
Primary practice location
3434 47TH St Ste 200
Boulder, CO 80301-1817
Mailing address
3434 47TH St Ste 200
Boulder, CO 80301-1817
Phone (303) 444-8100
Medicare participation
Medicare enrollment files- 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
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Dermatology
- Education
- Perelman School of Med at the University of Pennsylvania, 2019
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
3434 47TH St
Suite 200
Boulder, CO 80301-1817
Phone (303) 444-8100
Hospital & facility affiliations
- Boulder Community Health
Merit-based Incentive Payment System (MIPS)
- Final score
- 0 of 100
- Quality
- 0
- Improvement activities
- 0
- Cost
- 0
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Melanoma (skin cancer) excision | 103 |
| Removal of skin lesions | 583 |
| Skin biopsy | 178 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A6000567 | KS | MD | Dermatology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mandel Dermatology Boulder PLLC | Dermatology | Current | Accepting new patients |
| K2 Dermatology, LLC | Dermatology | Current | Accepting new patients |
Locations
1840 Folsom St
Ste 100
Boulder, CO 80302
Phone (303) 219-0499
3434 47th St
Ste 200
Boulder, CO 80301
Phone (303) 444-8100
2575 Spruce St
Unit C
Boulder, CO 80302
Phone (720) 741-8051
45 Northern Blvd
Greenvale, NY 11548
Phone (516) 506-7546
Organizations & group practices 2
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.
-
- Dermatology Physician
- Boulder, CO
- NPI 1558094003
-
- Dermatology Physician
- Boulder, CO
- NPI 1609518828
Hospital & facility affiliations 34
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Sleep Disorder Diagnostic Clinic/Center
- Boulder, CO
- NPI 1093357907
Hospital
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1553472000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1748908800000",
"number": "1063972040",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3434 47TH ST STE 200",
"city": "BOULDER",
"state": "CO",
"postal_code": "803011817",
"telephone_number": "303-444-8100"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3434 47TH ST STE 200",
"city": "BOULDER",
"state": "CO",
"postal_code": "803011817",
"telephone_number": "303-444-8100"
}
],
"practiceLocations": [],
"basic": {
"last_name": "FIX",
"first_name": "WILLIAM",
"middle_name": "CRANE",
"name_prefix": "Mr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2019-03-25",
"last_updated": "2025-06-03",
"certification_date": "2025-06-03",
"status": "A"
},
"taxonomies": [
{
"code": "207N00000X",
"taxonomy_group": "",
"desc": "Dermatology",
"state": "KS",
"license": "A6000567",
"primary": false
},
{
"code": "207N00000X",
"taxonomy_group": "",
"desc": "Dermatology",
"state": "CO",
"license": "DR.0072825",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Boulder, CO
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 3, 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.