Dr. Calvin Horace Knapp , MD
Dermatology โข Everett, WA
4004 Colby Ave
Everett, WA 982016203
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 29, 2018; this date does not establish years in practice.
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Published CMS data list 788 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:
- 88305 โ Pathology examination of tissue using a microscope, intermediate complexity: 161 service units.
- 99213 โ Established patient outpatient office visit: 119 service units.
- 99203 โ New patient outpatient office visit: 89 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 13 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 505 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:
- Clobetasol Propionate โ 108 prescription fills, including refills.
- Triamcinolone Acetonide โ 72 prescription fills, including refills.
- Ketoconazole โ 64 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 13 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Dermatology in Washington (2024, 244 clinicians with data). Median for this group: 1,749. Middle half: 802 to 3,541.
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 86 in 2023 to 788 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
4004 Colby Ave
Everett, WA 982016203
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: Optum Care Washington Pllc. 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
2018
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
279 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 $68,218 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 $46,039 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
569 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
$14,731 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
Years since graduation
8 years (graduated 2018)
CMS Doctors and Clinicians data list 2018 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
2018
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. Knapp 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. Knapp 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 Everett and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Dermatology in Washington (2024, 244 clinicians with data). Median for this group: 1,749. Middle half: 802 to 3,541.
Too few clinicians listed under Dermatology in Everett have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Dermatology in Washington (2024, 244 clinicians with data). Median for this group: $118,488. Middle half: $57,562 to $224,878.
Too few clinicians listed under Dermatology in Everett have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 65% of clinicians listed under Dermatology in Washington (2024, 244 clinicians with data). Median for this group: $81,409. Middle half: $39,184 to $154,214.
Too few clinicians listed under Dermatology in Everett have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Dermatology in Washington (2024, 278 clinicians with data). Median for this group: 484. Middle half: 214 to 862.
Too few clinicians listed under Dermatology in Everett have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Dermatology in Washington (2024, 278 clinicians with data). Median for this group: $65,882. Middle half: $7,804 to $224,271.
Too few clinicians listed under Dermatology in Everett have Medicare Part D data for 2024 to compare.
11 active clinicians are listed under Dermatology with a practice address in Everett, WA (384 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Everett
9.1% of these 11 clinicians have the CMS telehealth indicator.
72.7% of these 11 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 816% from 86 in 2023 to 788 in 2024.
- 2023: 86
- 2024: 788
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Medicare-allowed amount
Medicare-allowed amount increased 730% from $8,219 in 2023 to $68,218 in 2024.
- 2023: $8,219
- 2024: $68,218
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Paid by Medicare
Paid by Medicare increased 642% from $6,202 in 2023 to $46,039 in 2024.
- 2023: $6,202
- 2024: $46,039
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 104% from 248 in 2020 to 505 in 2024.
- 2020: 248
- 2021: 159
- 2022: 17
- 2023: 13
- 2024: 505
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30-day fills
30-day fills increased 98% from 288 in 2020 to 569 in 2024.
- 2020: 288
- 2021: 173
- 2022: 17
- 2023: 13
- 2024: 569
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Part D drug cost
Part D drug cost increased 64% from $8,990 in 2020 to $14,731 in 2024.
- 2020: $8,990
- 2021: $87,497
- 2022: $56,083
- 2023: $557
- 2024: $14,731
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
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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88305
Pathology examination of tissue using a microscope, intermediate complexity
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161 | 117 | $217.50 | $72.14 |
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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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119 | 90 | $251.08 | $90.82 |
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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
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89 | 89 | $311.54 | $109.22 |
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11102
Biopsy of related skin growth, first growth
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76 | 66 | $293.25 | $96.24 |
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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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74 | 51 | $346.66 | $126.80 |
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17000
Destruction of precancer skin growth, 1 growth
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65 | 58 | $188.50 | $56.17 |
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17003
Destruction of precancer skin growth, 2-14 growths
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56 | 25 | $17.75 | $6.77 |
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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
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49 | 49 | $463.79 | $163.65 |
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17110
Destruction of skin growth, 1-14 growths
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34 | 30 | $328.00 | $109.38 |
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88342
Special stained specimen slides to examine tissue, initial procedure
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26 | 25 | $332.25 | $107.34 |
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11103
Biopsy of related skin growth, each additional growth
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13 | 11 | $155.50 | $50.40 |
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87070
Bacterial culture, any other source except urine, blood or stool, aerobic
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13 | 11 | $19.25 | $8.45 |
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87205
Special gram or giemsa stain for microorganism
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13 | 11 | $9.75 | $4.18 |
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 |
|---|---|---|---|---|---|
| Clobetasol Propionate | Clobetasol Propionate | 108 | 3,187 | $5,027.18 | 64 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 72 | 2,197 | $739.42 | 54 |
| Ketoconazole | Ketoconazole | 64 | 1,995 | $843.74 | 42 |
| Doxycycline Hyclate | Doxycycline Hyclate | 43 | 1,609 | $926.88 | 21 |
| Betamethasone Dipropionate | Betamethasone Dipropionate | 39 | 839 | $2,111.63 | 24 |
| Hydrocortisone | Hydrocortisone | 37 | 750 | $218.40 | 29 |
| Spironolactone | Spironolactone | 23 | 1,011 | $139.60 | โ |
| Tacrolimus | Tacrolimus | 22 | 466 | $1,503.41 | 16 |
| Metronidazole | Metronidazole | 21 | 567 | $1,022.91 | 12 |
| Mupirocin | Mupirocin | 21 | 403 | $145.84 | 17 |
| Mometasone Furoate | Mometasone Furoate | 21 | 569 | $369.60 | โ |
| Prednisone | Prednisone | 17 | 462 | $118.15 | โ |
| Fluorouracil | Fluorouracil | 17 | 529 | $1,564.41 | 17 |
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: 2026-04-17NUCC 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
I20231027001791
WA
7214282862
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
Optum Care Washington Pllc
8910 Vernon Rd, Lake Stevens, WA 982582400
Phone: 4253971700
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 - Dermatopathology
Nurse Practitioner
Advanced Registered Nurse Practitioner
Dermatology
Dermatology
Doctor of Medicine (M.D.)
Dermatology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 7600 EVERGREEN WAY, EVERETT, WA 982036421 (Tel: 2068605414)
Registered at PO BOX 5127, EVERETT, WA 982065127 (Tel: 2068605414)
Dermatology (license number reported to NPPES: WA MD61463521)
Registered at 4004 COLBY AVE, EVERETT, WA 982016203 (Tel: 4253395417)
Registered at 4004 COLBY AVE, EVERETT, WA 982016203
Registered at 3303 SW BOND AVE # 16D, PORTLAND, OR 97239 (Tel: 5034183376)
Registered at 3303 SW BOND AVE # 16D, PORTLAND, OR 972394501
NPI status registered as active in NPPES database
Registered at 925 SENECA ST, SEATTLE, WA 981012742 (Tel: 2065836079)
Registered at 3905 4TH AVE NE, APT 301, SEATTLE, WA 981056829
Recorded as CALVIN KNAPP, MD
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 Everett
- Dr. Zarry Tavakkol, MD
- Matthew Majerus
- Dr. Mark Valentine, MD
- Dr. David Smith, MD
- Dr. Meredith Sheedy, MD
- Dr. Lucy Chao, MD
Mailing Address
7600 Evergreen Way
Everett, WA 982036421
Phone: 2068605414