What is William Brennan's specialty?

William Brennan (NPI 1336231869) is a Medicare-billing provider whose primary specialty is Physician Assistant in Tucson, AZ.

Where does William Brennan practice?

William Brennan practices in Tucson, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1336231869.

How much does Medicare pay William Brennan?

William Brennan (NPI 1336231869) received approximately $76K in total Medicare Part B payments, serving 505 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1336231869

William BrennanP.A.-C

PRACTICESPECIALISTS IN DERMATOLOGY, PLLCSee all providers at this practice →

Physician AssistantTucson, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,145

Unique beneficiaries

—

Total services

1,936

Distinct HCPCS

Medicare payment

$50K

Peer benchmark

Total Medicare services vs. 2,639 Physician Assistant providers in AZ — top quintile (cohort median 341).

PRESCRIBING · PART D · 2024

Total Rx claims

147

Beneficiaries

—

Total drug cost

$69K

Distinct drugs

Brand share

8.8%

Top prescribed drugs

Triamcinolone Acetonide45 claims

Clobetasol Propionate38 claims

Metronidazole29 claims

Apremilast13 claims

Betamethasone Dipropionate11 claims

QUALITY · MIPS · 2024

Final MIPS score

89.1

Quality

85.2

Cost

83.5

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

0.59%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$64

Payment records

By payment type

Food and Beverage$64

Top paying entities

Food and Beverage$64

REFERRAL NETWORK

Where William Brennan'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). 1 inbound referrers · 5 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
John Moseley Dermatology · Tucson, AZ	78	95

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Sonora Quest Laboratories Llc Clinical Laboratory · Phoenix, AZ	28	67
Weimin Hu Dermatology · Tucson, AZ	16	30
Laboratory Corporation Of America Clinical Laboratory · Phoenix, AZ	16	22
John Moseley Dermatology · Tucson, AZ	15	26
CARONDELET HEALTH NETWORK	14	21

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