What is Mary Hammack's specialty?

Mary Hammack (NPI 1871501874) is a Medicare-billing provider whose primary specialty is Internal Medicine in Plano, TX.

Where does Mary Hammack practice?

Mary Hammack practices in Plano, TX, based on the location reported in the CMS Medicare provider datasets for NPI 1871501874.

How much does Medicare pay Mary Hammack?

Mary Hammack (NPI 1871501874) received approximately $447K in total Medicare Part B payments, serving 641 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1871501874

Mary HammackMD

PRACTICEARASH TIRANDAZ MD PASee all providers at this practice →

Internal MedicinePlano, TXI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

5,851

Unique beneficiaries

—

Total services

12,855

Distinct HCPCS

Medicare payment

$439K

Peer benchmark

Total Medicare services vs. 6,183 Internal Medicine providers in TX — top quintile (cohort median 673).

PRESCRIBING · PART D · 2024

Total Rx claims

7,677

Beneficiaries

—

Total drug cost

$581K

Distinct drugs

129

Brand share

20.3%

Top prescribed drugs

Levothyroxine Sodium573 claims

Atorvastatin Calcium475 claims

Escitalopram Oxalate250 claims

Amlodipine Besylate223 claims

Losartan Potassium211 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$1K

Payment records

By payment type

Food and Beverage$1K

Top paying entities

Food and Beverage$1K

REFERRAL NETWORK

Where Mary Hammack'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). 5 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Btdi Jv Llp Independent Diagnostic Testing Facility (IDTF) · Plano, TX	47	107
Laboratory Corporation Of America Clinical Laboratory · Dallas, TX	41	223
TEXAS HEALTH PRESBYTERIAN HOSPITAL DALLAS	36	125
Mark Peterman Interventional Cardiology · Plano, TX	13	37
Clinical Pathology Laboratories, Inc. Clinical Laboratory · Austin, TX	12	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