What is William Mustas's specialty?

William Mustas (NPI 1629080932) is a Medicare-billing provider whose primary specialty is Physician Assistant in Waukesha, WI.

Where does William Mustas practice?

William Mustas practices in Waukesha, WI, based on the location reported in the CMS Medicare provider datasets for NPI 1629080932.

How much does Medicare pay William Mustas?

William Mustas (NPI 1629080932) received approximately $6K in total Medicare Part B payments, serving 95 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1629080932

William MustasP.A.

Physician AssistantWaukesha, WII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

131

Unique beneficiaries

—

Total services

148

Distinct HCPCS

Medicare payment

$5K

Peer benchmark

Total Medicare services vs. 2,745 Physician Assistant providers in WI — top quintile (cohort median 189).

PRESCRIBING · PART D · 2024

Total Rx claims

513

Beneficiaries

—

Total drug cost

$96K

Distinct drugs

Brand share

40.2%

Top prescribed drugs

Tamsulosin Hcl183 claims

Mirabegron61 claims

Oxybutynin Chloride47 claims

Vibegron45 claims

Ciprofloxacin Hcl39 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$134

Payment records

By payment type

Food and Beverage$134

Top paying entities

Food and Beverage$134

REFERRAL NETWORK

Where William Mustas'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). 4 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Harinder Gill Cardiology · Beaver Dam, WI	48	138
NPI 1134186828	15	25
Michael Lunde Family Practice · Plymouth, WI	12	20
PROHEALTH OCONOMOWOC MEMORIAL HOSPITAL, INC.	11	14

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