Dr. William Crane Fix , MD
Dermatology โข Boulder, CO
3434 47th St Ste 200
Boulder, CO 803011817
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on March 25, 2019; this date does not establish years in practice.
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Published CMS data list 1,169 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 17003 โ Destruction of precancer skin growth, 2-14 growths: 518 service units.
- 17000 โ Destruction of precancer skin growth, 1 growth: 163 service units.
- 99214 โ Established patient outpatient office visit: 131 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 236 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Ketoconazole โ 65 prescription fills, including refills.
- Triamcinolone Acetonide โ 34 prescription fills, including refills.
- Hydrocortisone โ 33 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 9 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 80% of clinicians listed under Dermatology in Boulder, CO (2024, 12 clinicians with data). Median for this group: 2,419. Middle half: 1,283 to 2,874.
Fewer Medicare Part B services than 75% of clinicians listed under Dermatology in Colorado (2024, 203 clinicians with data). Median for this group: 2,596. Middle half: 1,190 to 4,389.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 851 in 2023 to 1,169 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
3434 47th St Ste 200
Boulder, CO 803011817
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: K2 Dermatology Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Perelman School Of Med At The University Of Pennsylvania
2019
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
327 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $69,321 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $37,844 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
246 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$6,158 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $422.93 across 24 records.
By nature of payment
- Food and Beverage: $422.93 across 24 records.
Reporting-company totals (3 largest of 10)
- ABBVIE INC.: $109.42 across 5 records.
- Novartis Pharmaceuticals Corporation: $84.51 across 4 records.
- Organon LLC: $48.26 across 6 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2019
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Fix has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Fix as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boulder and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under Dermatology in Boulder, CO (2024, 12 clinicians with data). Median for this group: 2,419. Middle half: 1,283 to 2,874.
Fewer Medicare Part B services than 75% of clinicians listed under Dermatology in Colorado (2024, 203 clinicians with data). Median for this group: 2,596. Middle half: 1,190 to 4,389.
Medicare-allowed amount
A lower Medicare-allowed amount than 70% of clinicians listed under Dermatology in Boulder, CO (2024, 12 clinicians with data). Median for this group: $132,280. Middle half: $66,366 to $180,860.
A lower Medicare-allowed amount than 75% of clinicians listed under Dermatology in Colorado (2024, 203 clinicians with data). Median for this group: $170,010. Middle half: $83,771 to $277,777.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under Dermatology in Boulder, CO (2024, 12 clinicians with data). Median for this group: $90,798. Middle half: $38,895 to $134,423.
A lower Medicare payment amount than 75% of clinicians listed under Dermatology in Colorado (2024, 203 clinicians with data). Median for this group: $119,488. Middle half: $56,832 to $196,202.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Dermatology in Boulder, CO (2024, 13 clinicians with data). Median for this group: 249. Middle half: 196 to 363.
Fewer Part D prescriptions than 65% of clinicians listed under Dermatology in Colorado (2024, 234 clinicians with data). Median for this group: 383. Middle half: 189 to 635.
Part D drug cost
Close to the middle for clinicians listed under Dermatology in Boulder, CO (2024, 13 clinicians with data). Median for this group: $6,535. Middle half: $4,644 to $14,198.
A lower Part D drug cost than 70% of clinicians listed under Dermatology in Colorado (2024, 234 clinicians with data). Median for this group: $57,705. Middle half: $5,261 to $160,639.
18 active clinicians are listed under Dermatology with a practice address in Boulder, CO (305 in Colorado).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boulder
0% of these 18 clinicians have the CMS telehealth indicator.
72.2% of these 18 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 37% from 851 in 2023 to 1,169 in 2024.
- 2023: 851
- 2024: 1,169
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Medicare-allowed amount
Medicare-allowed amount increased 27% from $54,417 in 2023 to $69,321 in 2024.
- 2023: $54,417
- 2024: $69,321
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Paid by Medicare
Paid by Medicare decreased 11% from $42,625 in 2023 to $37,844 in 2024.
- 2023: $42,625
- 2024: $37,844
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 926% from 23 in 2020 to 236 in 2024.
- 2020: 23
- 2021: 291
- 2022: 399
- 2023: 509
- 2024: 236
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30-day fills
30-day fills increased 884% from 25 in 2020 to 246 in 2024.
- 2020: 25
- 2021: 299
- 2022: 431
- 2023: 522
- 2024: 246
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Part D drug cost
Part D drug cost went from $499 in 2020 to $6,158 in 2024.
- 2020: $499
- 2021: $9,368
- 2022: $16,963
- 2023: $77,755
- 2024: $6,158
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $111.45 in 2021 to $422.93 in 2025.
- 2021: $111.45
- 2022: $219.98
- 2023: $243.23
- 2024: $565.91
- 2025: $422.93
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 24 records totaling $422.93.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
SKYRIZI | General | $25.00 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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COSENTYX | General | $25.00 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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โ | General | $24.41 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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COSENTYX | General | $24.33 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $24.10 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
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Bimzelx | General | $23.17 |
| Botanix SB Inc |
Food and Beverage
In-kind items and services
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SOFDRA | General | $22.89 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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SKYRIZI | General | $21.44 |
| Galderma Laboratories, L.P. |
Food and Beverage
In-kind items and services
|
NEMLUVIO | General | $21.31 |
| Almirall LLC |
Food and Beverage
In-kind items and services
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Seysara | General | $20.55 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $19.78 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
SKYRIZI | General | $19.69 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
Rhapsido | General | $19.10 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
RINVOQ | General | $18.88 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
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DUPIXENT | General | $17.88 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $17.54 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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COSENTYX | General | $16.08 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
โ | General | $15.57 |
| Almirall LLC |
Food and Beverage
In-kind items and services
|
Klisyri | General | $13.52 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
โ | General | $10.45 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
โ | General | $8.05 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
VTAMA | General | $7.32 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
โ | General | $3.88 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
VTAMA | General | $2.99 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2023โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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17003
Destruction of precancer skin growth, 2-14 growths
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518 | 128 | $15.57 | $6.32 |
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17000
Destruction of precancer skin growth, 1 growth
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163 | 159 | $158.46 | $50.48 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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131 | 122 | $294.12 | $122.75 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
85 | 85 | $390.96 | $158.75 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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77 | 75 | $219.77 | $87.33 |
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17110
Destruction of skin growth, 1-14 growths
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74 | 71 | $269.48 | $105.13 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
54 | 54 | $278.95 | $107.37 |
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11102
Biopsy of related skin growth, first growth
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39 | 38 | $259.29 | $89.55 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
|
15 | 11 | $2.43 | $0.93 |
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13101
Complicated repair of wound of trunk, 2.6-7.5 cm
|
13 | 13 | $867.31 | $341.28 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ketoconazole | Ketoconazole | 65 | 1,682 | $1,257.01 | 40 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 34 | 944 | $482.14 | 27 |
| Hydrocortisone | Hydrocortisone | 33 | 626 | $221.04 | 23 |
| Mupirocin | Mupirocin | 26 | 436 | $185.21 | 22 |
| Clobetasol Propionate | Clobetasol Propionate | 19 | 467 | $436.32 | 11 |
| Fluorouracil | Fluorouracil | 17 | 424 | $1,635.47 | 17 |
| Betamethasone Dipropionate | Betamethasone Dipropionate | 16 | 496 | $661.18 | โ |
| Fluocinonide | Fluocinonide | 13 | 390 | $966.80 | โ |
| Ammonium Lactate | Ammonium Lactate | 13 | 424 | $312.54 | 13 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-06-03NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - DERMATOLOGY
I20240507003279
CO
1850745464
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
K2 Dermatology Llc
3434 47th St, Boulder, CO 803011817
Phone: 3034448100
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dermatology
Doctor of Medicine (M.D.)
Dermatology
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 3434 47TH ST STE 200, BOULDER, CO 803011817 (Tel: 3034448100)
Registered at 3434 47TH ST STE 200, BOULDER, CO 803011817 (Tel: 3034448100)
Registered at 1840 FOLSOM ST STE 100, BOULDER, CO 803025712 (Tel: 7207418051)
Registered at 1840 FOLSOM ST STE 100, BOULDER, CO 803025712 (Tel: 7207418051)
Registered at 1213 15TH AVE W STE 102, WILLISTON, ND 588013800 (Tel: 7015018220)
Registered at 1213 15TH AVE W STE 102, WILLISTON, ND 588013800 (Tel: 7015018220)
Dermatology (license number reported to NPPES: KS A6000567)
Registered at 111 E 210TH ST, BRONX, NY 104672401 (Tel: 7189204321)
Registered at 3411 WAYNE AVE, BRONX, NY 104672509 (Tel: 7039694012)
Recorded as WILLIAM FIX, MD
NPI status registered as active in NPPES database
Registered at 800 SPRUCE ST, PHILADELPHIA, PA 191076192 (Tel: 2158293000)
Registered at 2124 SPRUCE ST APT 1R, PHILADELPHIA, PA 191036577 (Tel: 7039694012)
Recorded as WILLIAM FIX
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dermatology Specialists in Boulder
- Dr. Cathy Koger, DO
- Dr. Shannon Detty, MD
- Dr. Jenna Peart, MD
- Dr. George Russell, MD
- Dr. Laura Huff, MD
- Dr. Steven Resnick, MD
More public profiles in Colorado
Directory navigation, in NPI number order.
- Joshua Senger, PA-C Physician Assistant - Medical ยท Aurora
- Nicole Mezo, PA Specialist ยท Denver
- James Heighway, DPT, PT Physical Therapist ยท Boulder
- Coleman Eich, DDS Dentist - General Practice ยท Thornton
- Paul Hartigan, DDS Dentist - General Practice ยท Longmont
- Julie Rosser, DO Pathology - Anatomic Pathology & Clinical Pathology ยท Aurora
- Carlos Vela Brol, MD Family Medicine ยท Lakewood
- Amy Wall, NP Nurse Practitioner ยท Colorado Springs
- Kimberly Shern, NURSE PRACTITIONER Nurse Practitioner - Family ยท Aurora
- Madison Chu, MD Psychiatry & Neurology - Psychiatry ยท Colorado Springs
- Julie Deters, FNP Nurse Practitioner - Family ยท Loveland
- Rhiannon Trepanier Harfert, PharmD, RPH Pharmacist ยท Colorado Springs
Mailing Address
3434 47th St Ste 200
Boulder, CO 803011817
Phone: 3034448100