What is Marissa Williams's specialty?

Marissa Williams (NPI 1851688873) is a Medicare-billing provider whose primary specialty is Physician Assistant in Zephyrhills, FL.

Where does Marissa Williams practice?

Marissa Williams practices in Zephyrhills, FL, based on the location reported in the CMS Medicare provider datasets for NPI 1851688873.

How much does Medicare pay Marissa Williams?

Marissa Williams (NPI 1851688873) received approximately $2K in total Medicare Part B payments, serving 28 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1851688873

Marissa WilliamsPA-C

PRACTICEZEPHYRHILLS FAMILY PRACTICE AND GERIATRIC CARE, LLCSee all providers at this practice →

Physician AssistantZephyrhills, FLI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$1K

Peer benchmark

Total Medicare services vs. 6,755 Physician Assistant providers in FL — bottom quintile (cohort median 271).

PRESCRIBING · PART D · 2024

Total Rx claims

4,722

Beneficiaries

—

Total drug cost

$671K

Distinct drugs

105

Brand share

22.0%

Top prescribed drugs

Levothyroxine Sodium289 claims

Atorvastatin Calcium217 claims

Amlodipine Besylate191 claims

Rosuvastatin Calcium190 claims

Losartan Potassium173 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$805

Payment records

By payment type

Food and Beverage$805

Top paying entities

Food and Beverage$805

REFERRAL NETWORK

Where Marissa Williams'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). 6 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Kacian Brown Family Practice · Maitland, FL	42	108
PASCO REGIONAL MEDICAL CENTER, LLC	35	98
FLORIDA HOSPITAL ZEPHYRHILLS INC	31	112
Binu Jacob Clinical Cardiac Electrophysiology · Zephyrhills, FL	20	95
Katie Griggs Physician Assistant · Lakeland, FL	17	36
Ahad Mahootchi Ophthalmology · Zephyrhills, FL	13	30

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