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 1215949524

Donald LongjohnM.D.

PRACTICEUNIVERSITY OF SOUTHERN CALIFORNIA ORTHOPAEDIC SURGERY ASSOCIATES, INCSee all providers at this practice →
Orthopedic SurgeryLos Angeles, CAI
CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore
OIG/SAM exclusion screening, sanctions history
© 2026 CareTrace
PricingContactPrivacyTerms
QUALITY · MIPS · 2024
No data available for this provider in 2024.
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (7)

CCN 058277
Home health agency
CCN 059067
Home health agency
CCN 050040
Hospital
CCN 050239
Hospital
CCN 050660
Hospital
CCN 050696
Hospital
CCN 050717
Hospital
PRESCRIBING · PART D · 2024
Total Rx claims
160
Beneficiaries
—
Total drug cost
$4K
Distinct drugs
6
Brand share
0.0%
Top prescribed drugs
Amoxicillin53 claims
Diclofenac Sodium33 claims
Mupirocin29 claims
Oxycodone Hcl18 claims
Meloxicam16 claims
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$103
Payment records
2
By payment type
Food and Beverage$103
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
811
Unique beneficiaries
—
Total services
957
Distinct HCPCS
9
Medicare payment
$110K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 1,921 Orthopedic Surgery providers in CA — below median (cohort median 1,100).
REFERRAL NETWORK

Where Donald Longjohn'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). 13 inbound referrers · 26 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
Eric White
Diagnostic Radiology · Los Angeles, CA
116498
Aaron Schein
Diagnostic Radiology · Los Angeles, CA
100334
COUNTY OF LOS ANGELES44135
Unilab Corporation
Clinical Laboratory · West Hills, CA
31108
MSJ HEALTHCARE LLC3160
James Pacino
Internal Medicine · Los Angeles, CA
23248
Jason Bang
Anesthesiology · Los Angeles, CA
19131
Mojgan Moallempour
Anesthesiology · Los Angeles, CA
1884
Wang Ji
Internal Medicine · Downey, CA
1549
GUERREIN, MARSHA1320
Bonnie Garon
Diagnostic Radiology · Los Angeles, CA
1250
Carlo Medina
Hospitalist · Marina Del Rey, CA
1261
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
UNIVERSITY OF SOUTHERN CALIFORNIA2862,344
COUNTY OF LOS ANGELES138387
George Matcuk
Diagnostic Radiology · West Hollywood, CA
75234
Dakshesh Patel
Diagnostic Radiology · Los Angeles, CA
74239
Alexander Fedenko
Pathology · Los Angeles, CA
47180
Unilab Corporation
Clinical Laboratory · West Hills, CA
35167
Eric White
Diagnostic Radiology · Los Angeles, CA
3496
MSJ HEALTHCARE LLC32170
Aaron Schein
Diagnostic Radiology · Los Angeles, CA
3288
UNIVERSITY OF SOUTHERN CALIFORNIA2169
James Pacino
Internal Medicine · Los Angeles, CA
20100
Jason Bang
Anesthesiology · Los Angeles, CA
2051
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.