What is William Andersen's specialty?

William Andersen (NPI 1538135900) is a Medicare-billing provider whose primary specialty is Dermatology in Lancaster, PA.

Where does William Andersen practice?

William Andersen practices in Lancaster, PA, based on the location reported in the CMS Medicare provider datasets for NPI 1538135900.

How much does Medicare pay William Andersen?

William Andersen (NPI 1538135900) received approximately $395K in total Medicare Part B payments, serving 1,568 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1538135900

William AndersenMD

PRACTICELANCASTER SKIN CENTER PCSee all providers at this practice →

DermatologyLancaster, PAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

3,944

Unique beneficiaries

—

Total services

5,241

Distinct HCPCS

Medicare payment

$363K

Peer benchmark

Total Medicare services vs. 531 Dermatology providers in PA — top quintile (cohort median 2,070).

PRESCRIBING · PART D · 2024

Total Rx claims

528

Beneficiaries

—

Total drug cost

$68K

Distinct drugs

Brand share

4.9%

Top prescribed drugs

Triamcinolone Acetonide71 claims

Imiquimod70 claims

Fluocinonide51 claims

Minoxidil37 claims

Mupirocin34 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where William Andersen's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 21 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
LANCASTER GENERAL HOSPITAL	442	1,011
Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ	38	70
EPHRATA COMMUNITY HOSPITAL	37	69
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Norristown, PA	27	36
ROSE CITY HMA LLC	25	67
Melissa Mckernan Pulliam Clinical Cardiac Electrophysiology · Lancaster, PA	25	33
Seth Worley Clinical Cardiac Electrophysiology · Lancaster, PA	19	30
Neil Clark Cardiology · Lancaster, PA	17	37
SHARP, JOHN	15	24
Jeffrey Kramer Diagnostic Radiology · Allentown, PA	14	16
GRAY, LOUIS	14	36
James Spicher Internal Medicine · Lancaster, PA	14	32

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events