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PROVIDER PROFILE · NPI 1366411555

Mark ShieldsMD

Internal MedicineLaguna Hills, CAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
QUALITY · MIPS · 2024
Final MIPS score
87.5
Quality
85.3
Cost
78.7
Improvement activities
40.0
Promoting interop.
93.0
Payment adjustment
0.52%
Individual
PRESCRIBING · PART D · 2024
Total Rx claims
6,902
Beneficiaries
—
Total drug cost
$296K
Distinct drugs
116
Brand share
17.5%
Top prescribed drugs
Atorvastatin Calcium453 claims
Losartan Potassium256 claims
Amlodipine Besylate251 claims
Levothyroxine Sodium242 claims
Pantoprazole Sodium217 claims
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
816
Unique beneficiaries
—
Total services
1,055
Distinct HCPCS
18
Medicare payment
$75K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 10,499 Internal Medicine providers in CA — above median (cohort median 531).
REFERRAL NETWORK

Where Mark Shields'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 · 25 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
SADDLEBACK MEMORIAL MEDICAL CENTER152641
HERREN ENTERPRISES INC2987
Elliott Fankuchen
Diagnostic Radiology · Laguna Beach, CA
2066
WAVE IMAGING LLC1940
MEMORIALCARE HOME HEALTH - LLC1851
Unilab Corporation
Clinical Laboratory · West Hills, CA
1848
SUTHERLAND, JAMES1440
SZYMANOWSKI, JEREMY1329
Kimvir Dhillon
Endocrinology · Laguna Hills, CA
1329
Erik Pasin
Urology · Mission Viejo, CA
1279
Ronald Gim
Cardiology · Laguna Hills, CA
1127
HARRIS HISTOLOGY SERVICES1130
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
SADDLEBACK MEMORIAL MEDICAL CENTER91339
Laboratory Corporation Of America
Clinical Laboratory · San Diego, CA
33110
WAVE IMAGING LLC2966
Daniel Mckenzie
Dermatology · Laguna Hills, CA
2286
HERREN ENTERPRISES INC2069
Tze-Kong Meng
Diagnostic Radiology · Laguna Beach, CA
1969
Erik Pasin
Urology · Mission Viejo, CA
1865
Ramin Rabbani
Cardiology · Laguna Hills, CA
1882
HARRIS HISTOLOGY SERVICES1738
MEMORIALCARE HOME HEALTH - LLC1737
Unilab Corporation
Clinical Laboratory · West Hills, CA
1644
Sasan Ghaffari
Cardiology · Laguna Hills, CA
1559
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.