caretrace.iopowered by▸healthparse
SearchCohort Builder
Tools▾
KOL FinderTerritoriesDrug Compare
AI Query
Browse▾
By stateBy specialty
Pricing
SearchCohort BuilderToolsKOL FinderTerritoriesDrug CompareAI QueryBrowseBy stateBy specialtyPricing
PROVIDER PROFILE · NPI 1164638177

Lenna MartyakM.D.

PRACTICEWEST LOS ANGELES ANESTHESIA SERVICESSee all providers at this practice →
GastroenterologySanta Monica, CAI
CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore
OIG/SAM exclusion screening, sanctions history
© 2026 CareTrace
PricingContactPrivacyTerms
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 050290
Hospital
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$2K
Payment records
87
By payment type
Food and Beverage$2K
QUALITY · MIPS · 2024
Final MIPS score
90.4
Quality
96.1
Cost
72.0
Improvement activities
40.0
Promoting interop.
100.0
Payment adjustment
0.65%
Group
PRESCRIBING · PART D · 2024
Total Rx claims
1,252
Beneficiaries
—
Total drug cost
$1.0M
Distinct drugs
25
Brand share
28.2%
Top prescribed drugs
Pantoprazole Sodium334 claims
Famotidine256 claims
Omeprazole93 claims
Linaclotide74 claims
Ondansetron44 claims
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
1,081
Unique beneficiaries
—
Total services
1,357
Distinct HCPCS
16
Medicare payment
$149K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,398 Gastroenterology providers in CA — top quintile (cohort median 750).
REFERRAL NETWORK

Where Lenna Martyak'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). 9 inbound referrers · 18 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
PROVIDENCE SAINT JOHN'S HEALTH CENTER104258
ROGERS, DAVID5981
Vicki Schiller
Diagnostic Radiology · Santa Monica, CA
1932
Robert Krasny
Diagnostic Radiology · Santa Monica, CA
1824
Srinivas Peddi
Diagnostic Radiology · Valencia, CA
1623
Simon Gabriel
Diagnostic Radiology · Los Angeles, CA
1522
Melani Shaum
Hematology-Oncology · Lompoc, CA
1450
Unilab Corporation
Clinical Laboratory · West Hills, CA
1446
Rahul Dixit
Gastroenterology · Santa Monica, CA
1115
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
Endoscopy Center Of Southern California Llc
Ambulatory Surgical Center · Santa Monica, CA
71123
PROVIDENCE SAINT JOHN'S HEALTH CENTER62131
ROGERS, DAVID3243
Robert Krasny
Diagnostic Radiology · Santa Monica, CA
2332
Barbara Brennan
Certified Registered Nurse Anesthetist (CRNA) · Inglewood, CA
2239
HUGHES, PATRICIA2134
Ira Smalberg
Diagnostic Radiology · Santa Monica, CA
1945
Morris Grabie
Internal Medicine · Santa Monica, CA
1765
Unilab Corporation
Clinical Laboratory · West Hills, CA
1539
CEDARS-SINAI MEDICAL CENTER1445
Laboratory Corporation Of America
Clinical Laboratory · San Diego, CA
1427
Simon Gabriel
Diagnostic Radiology · Los Angeles, CA
1323
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.