What is Martha Hierro's specialty?

Martha Hierro (NPI 1770562431) is a Medicare-billing provider whose primary specialty is Gastroenterology in Santa Monica, CA.

Where does Martha Hierro practice?

Martha Hierro practices in Santa Monica, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1770562431.

How much does Medicare pay Martha Hierro?

Martha Hierro (NPI 1770562431) received approximately $57K in total Medicare Part B payments, serving 153 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1770562431

Martha HierroM.D.

PRACTICEMARTHA HIERRO, MD INCSee all providers at this practice →

GastroenterologySanta Monica, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

367

Unique beneficiaries

—

Total services

475

Distinct HCPCS

Medicare payment

$54K

Peer benchmark

Total Medicare services vs. 1,398 Gastroenterology providers in CA — below median (cohort median 750).

PRESCRIBING · PART D · 2024

Total Rx claims

189

Beneficiaries

—

Total drug cost

$17K

Distinct drugs

Brand share

7.9%

Top prescribed drugs

Pantoprazole Sodium82 claims

Famotidine54 claims

Omeprazole25 claims

Lipase/Protease/Amylase15 claims

Dicyclomine Hcl13 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$794

Payment records

By payment type

Food and Beverage$794

Top paying entities

Food and Beverage$794

REFERRAL NETWORK

Where Martha Hierro'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). 12 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Endoscopy Center Of Southern California Llc Ambulatory Surgical Center · Santa Monica, CA	102	115
PROVIDENCE SAINT JOHN'S HEALTH CENTER	70	223
ROGERS, DAVID	55	61
Barbara Brennan Certified Registered Nurse Anesthetist (CRNA) · Inglewood, CA	16	18
Simon Gabriel Diagnostic Radiology · Los Angeles, CA	16	31
REGENTS OF THE UNIV OF CALIFORNIA	16	22
Karen Hwang Certified Registered Nurse Anesthetist (CRNA) · Santa Monica, CA	16	17
Unilab Corporation Clinical Laboratory · West Hills, CA	14	20
Vicki Schiller Diagnostic Radiology · Santa Monica, CA	13	23
Joshua Hanelin Diagnostic Radiology · Valencia, CA	12	25
Srinivas Peddi Diagnostic Radiology · Valencia, CA	12	22
Emily Crandall Cardiology · Santa Monica, CA	11	39

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