Karynne Duncan, M.D.
NPI 1548235617 · Dermatology Physician · Saint Helena, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karynne Duncan, M.D. is a Dermatology Physician provider in Saint Helena, CA (NPI 1548235617).
Provider details
- NPI number
- 1548235617
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- G86640 (CA)
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
20 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
4,243 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,947 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 671 | $153 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 549 | $62 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 268 | $109 |
| Destruction of Skin Growth, 1-14 Growths17110 | 259 | $145 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 66 | 37 |
| Minoxidil | 63 | 19 |
| Mupirocin | 61 | 54 |
| Doxycycline Hyclate | 43 | 15 |
| Hydrocortisone | 28 | 26 |
| Clobetasol Propionate | 24 | 19 |
| Fluconazole | 24 | — |
| Fluorouracil | 24 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-21
- Last updated
- 2026-06-07
Frequently asked questions
- What is Karynne Duncan's NPI number?
- Karynne Duncan's National Provider Identifier (NPI) is 1548235617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karynne Duncan's specialty?
- Karynne Duncan is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Karynne Duncan located?
- Karynne Duncan's practice location on file with NPPES is 1104 Adams St, Saint Helena, CA 94574-1164.
- What is Karynne Duncan's phone number?
- The practice phone number listed in the NPPES registry for Karynne Duncan is (707) 967-0800.
- Does Karynne Duncan accept Medicare?
- Karynne Duncan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karynne Duncan's NPI active?
- Yes — Karynne Duncan's NPI (1548235617) is active in the NPPES registry as of the last update on 2026-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.