Calvin Knapp, MD
NPI 1225533458 · Dermatology Physician · Everett, WA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin Knapp, MD is a Dermatology Physician provider in Everett, WA (NPI 1225533458).
Provider details
- NPI number
- 1225533458
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD61463521 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
788 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 161 | $72 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 119 | $91 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 89 | $109 |
| Biopsy of Related Skin Growth, First Growth11102 | 76 | $96 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 74 | $127 |
| Destruction of Precancer Skin Growth, 1 Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 108 | 64 |
| Triamcinolone Acetonide | 72 | 54 |
| Ketoconazole | 64 | 42 |
| Doxycycline Hyclate | 43 | 21 |
| Betamethasone Dipropionate | 39 | 24 |
| Hydrocortisone | 37 | 29 |
| Spironolactone | 23 | — |
| Tacrolimus | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-29
- Last updated
- 2026-04-17
- Certified
- 2026-04-17
Frequently asked questions
- What is Calvin Knapp's NPI number?
- Calvin Knapp's National Provider Identifier (NPI) is 1225533458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Knapp's specialty?
- Calvin Knapp is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin Knapp located?
- Calvin Knapp's practice location on file with NPPES is 4004 Colby Ave, Everett, WA 98201-6203.
- What is Calvin Knapp's phone number?
- The practice phone number listed in the NPPES registry for Calvin Knapp is (425) 339-5417.
- Does Calvin Knapp accept Medicare?
- Calvin Knapp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin Knapp's NPI active?
- Yes — Calvin Knapp's NPI (1225533458) is active in the NPPES registry as of the last update on 2026-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.