PROVIDER PROFILE · NPI 1275652356

Mary Hernandez-ZhangM.D.

Internal MedicineHouston, TXI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

780

Unique beneficiaries

—

Total services

910

Distinct HCPCS

Medicare payment

$86K

Peer benchmark

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

PRESCRIBING · PART D · 2024

Total Rx claims

2,980

Beneficiaries

—

Total drug cost

$149K

Distinct drugs

Brand share

17.6%

Top prescribed drugs

Atorvastatin Calcium202 claims

Levothyroxine Sodium163 claims

Rosuvastatin Calcium157 claims

Amlodipine Besylate142 claims

Lisinopril90 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$122

Payment records

By payment type

Food and Beverage$122

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (4)

Hospital

Hospital

Hospital

Inpatient rehabilitation facility

REFERRAL NETWORK

Where Mary Hernandez-Zhang'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). 3 inbound referrers · 4 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Houston, TX	47	172
GILLESPIE, JOHN	15	28
Maria Visus Internal Medicine · Houston, TX	12	15

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Houston, TX	60	217
HOUSTON METHODIST ST. JOHN HOSPITAL	45	145
GILLESPIE, JOHN	23	55
Maria Visus Internal Medicine · Houston, TX	11	23

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