William Andersen, MD
NPI 1538135900 · Dermatology Physician · Lancaster, PA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Andersen, MD is a Dermatology Physician provider in Lancaster, PA (NPI 1538135900).
Provider details
- NPI number
- 1538135900
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD061425L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
5,143 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 992 | $86 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 987 | $67 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 647 | $6 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 586 | $55 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 239 | $121 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 71 | 55 |
| Imiquimod | 70 | 62 |
| Fluocinonide | 51 | 39 |
| Minoxidil | 37 | — |
| Mupirocin | 34 | 33 |
| Ketoconazole | 32 | 17 |
| Clobetasol Propionate | 30 | 19 |
| Fluorouracil | 28 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$116 across 2 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
- 2006-02-27
- Last updated
- 2007-12-07
Frequently asked questions
- What is William Andersen's NPI number?
- William Andersen's National Provider Identifier (NPI) is 1538135900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Andersen's specialty?
- William Andersen is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is William Andersen located?
- William Andersen's practice location on file with NPPES is 190 N Pointe Blvd, Lancaster, PA 17601.
- What is William Andersen's phone number?
- The practice phone number listed in the NPPES registry for William Andersen is (717) 560-6444.
- Does William Andersen accept Medicare?
- William Andersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Andersen's NPI active?
- Yes — William Andersen's NPI (1538135900) is active in the NPPES registry as of the last update on 2007-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.