What is Marshall Hamill's specialty?

Marshall Hamill (NPI 1972592384) is a Medicare-billing provider whose primary specialty is Ophthalmology in Houston, TX.

Where does Marshall Hamill practice?

Marshall Hamill practices in Houston, TX, based on the location reported in the CMS Medicare provider datasets for NPI 1972592384.

How much does Medicare pay Marshall Hamill?

Marshall Hamill (NPI 1972592384) received approximately $152K in total Medicare Part B payments, serving 476 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1972592384

Marshall HamillM.D.

OphthalmologyHouston, TXI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

698

Unique beneficiaries

—

Total services

886

Distinct HCPCS

Medicare payment

$128K

Peer benchmark

Total Medicare services vs. 1,238 Ophthalmology providers in TX — below median (cohort median 1,864).

PRESCRIBING · PART D · 2024

Total Rx claims

847

Beneficiaries

—

Total drug cost

$68K

Distinct drugs

Brand share

30.7%

Top prescribed drugs

Fluorometholone368 claims

Difluprednate123 claims

Moxifloxacin Hcl98 claims

Polymyxin B Sulf/Trimethoprim93 claims

Prednisolone Acetate41 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$53

Payment records

By payment type

Food and Beverage$53

Top paying entities

Food and Beverage$53

REFERRAL NETWORK

Where Marshall Hamill'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). 11 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
CHI ST. LUKE'S HEALTH BAYLOR COLLEGE OF MEDICINE MEDICAL CENTER	118	335
MORETTO, MATTHEW	44	122
BIEGEL, DIANE	43	96
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Houston, TX	40	121
SELASSIE, RAHEL	38	73
HARRIS COUNTY HOSPITAL DISTRICT	32	105
BAYLOR COLLEGE OF MEDICINE AMBULATORY SURGERY CENTER	25	56
Clinical Pathology Laboratories, Inc. Clinical Laboratory · Austin, TX	18	37
UNIVERSITY OF TEXAS M. D. ANDERSON CANCER CENTER	17	66
Benjamin Frankfort Ophthalmology · Houston, TX	15	46
Melissa Wolf Certified Registered Nurse Anesthetist (CRNA) · Houston, TX	14	34

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