Karen Han, MD
NPI 1811908692 · Dermatology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Han, MD is a Dermatology Physician provider in Palo Alto, CA (NPI 1811908692).
Provider details
- NPI number
- 1811908692
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A69817 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,823 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 1,910 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 561 | $155 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 470 | $69 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 361 | $111 |
| Destruction of Skin Growth, 1-14 Growths17110 | 283 | $151 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluorouracil | 106 | 92 |
| Triamcinolone Acetonide | 75 | 55 |
| Metronidazole | 66 | 34 |
| Ketoconazole | 57 | 36 |
| Mupirocin | 45 | 32 |
| Clobetasol Propionate | 43 | 26 |
| Econazole Nitrate | 40 | 25 |
| Ciclopirox | 35 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$307 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-10
- Last updated
- 2020-05-13
- Certified
- 2020-05-13
Frequently asked questions
- What is Karen Han's NPI number?
- Karen Han's National Provider Identifier (NPI) is 1811908692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Han's specialty?
- Karen Han is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Han located?
- Karen Han's practice location on file with NPPES is 795 El Camino Real, Palo Alto, CA 94301-2302.
- What is Karen Han's phone number?
- The practice phone number listed in the NPPES registry for Karen Han is (650) 853-5302.
- Does Karen Han accept Medicare?
- Karen Han is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Han's NPI active?
- Yes — Karen Han's NPI (1811908692) is active in the NPPES registry as of the last update on 2020-05-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.