Gregory Lee Thalken, MD
NPI 1861547317ActiveIndividual· Radiology, Diagnostic Radiology· Long Beach, CA
Radiology, Diagnostic Radiology (MD) with Ochsner Clinic LLC and 40 other groups, practicing in Long Beach, California. Medicare paid $91,806 for services to 1,109 patients in 2024. Lists Baptist Health Medical Center-Little Rock and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1861547317 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 24, 2007 |
| Last updated in NPPES | May 6, 2026 |
| Certified by provider | May 6, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Diagnostic Radiology Primary | 2085R0202X | C162624 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Diagnostic Radiology (AL); Practitioner - Diagnostic Radiology (AR); Practitioner - Diagnostic Radiology (AZ); Practitioner - Diagnostic Radiology (CA); Practitioner - Diagnostic Radiology (HI); Practitioner - Diagnostic Radiology (IL); Practitioner - Diagnostic Radiology (IN); Practitioner - Diagnostic Radiology (KY); Practitioner - Diagnostic Radiology (LA); Practitioner - Diagnostic Radiology (MI); Practitioner - Diagnostic Radiology (MN); Practitioner - Diagnostic Radiology (MS); Practitioner - Diagnostic Radiology (NJ); Practitioner - Diagnostic Radiology (NV); Practitioner - Diagnostic Radiology (OH); Practitioner - Diagnostic Radiology (OR); Practitioner - Diagnostic Radiology (PA); Practitioner - Diagnostic Radiology (TN); Practitioner - Diagnostic Radiology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,109 |
|---|---|
| Services billed | 3,098 across 95 procedure codes |
| Paid by Medicare | $91,806 |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Diagnostic Radiology |
Medical groups
- Ochsner Clinic LLCNew Orleans, LA · 2,864 clinicians
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
- Temple Faculty Practice Plan IncPhiladelphia, PA · 1,368 clinicians
- University of Arkansas for Medical SciencesLittle Rock, AR · 1,175 clinicians
- Arkansas Health GroupLittle Rock, AR · 659 clinicians
- Valley Physician Services PCReading, PA · 592 clinicians
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
- Erlanger HealthChattanooga, TN · 507 clinicians
- McLaren Hospital GroupPontiac, MI · 375 clinicians
- Capital Health Multispecialty GroupPennington, NJ · 343 clinicians
- Inspira Health Network Medical Group PCMullica Hill, NJ · 238 clinicians
- Medical Foundation IncMeridian, MS · 212 clinicians
- County of San JoaquinFrench Camp, CA · 199 clinicians
- Renaissance Medical FoundationEdinburg, TX · 181 clinicians
- Integrated Imaging Consultants LLCPlano, TX · 159 clinicians
- Insight Chicago IncChicago, IL · 141 clinicians
- Ecm Health Group LLCPlano, TX · 140 clinicians
- Menalam Health Services PCPlano, TX · 113 clinicians
- Lompoc Valley Medical CenterLompoc, CA · 91 clinicians
- Central Valley Imaging Medical Associates IncEdmond, OK · 89 clinicians
- Focus Medical ImagingOklahoma City, OK · 84 clinicians
- Lodi Memorial Hospital Association IncLodi, CA · 80 clinicians
- Universal Radiology Partners of Nevada LLCPahrump, NV · 76 clinicians
- Los Alamitos Radiology Group IncLos Alamitos, CA · 67 clinicians
- Universal Radiology Partners of California PCTemecula, CA · 66 clinicians
- Washington Radiologists Medical Group IncPlano, TX · 65 clinicians
- Peninsula Radiological Associates LimitedPlano, TX · 63 clinicians
- Placerville Radiology Medical Group IncPlano, TX · 61 clinicians
- Nrhs Radiology AssociatesPlano, TX · 61 clinicians
- Oklahoma Radiology Group P CPlano, TX · 61 clinicians
- Fullerton Radiology Medical Group IncPlano, TX · 55 clinicians
- San Antonio Radiological MedicalPlano, TX · 53 clinicians
- Radx Imaging Partners IncPlano, TX · 46 clinicians
- Santa Cruz Radiology L L CNogales, AZ · 45 clinicians
- Radiology Group PC SCPlano, TX · 44 clinicians
- Rockford Radiology AssocHouston, TX · 43 clinicians
- West Valley Radiology Medical Group IncLake Aluma, OK · 43 clinicians
- Kennewick Radiology Group PCKennewick, WA · 38 clinicians
- Southern Arizona Rad Associates LLCBeaumont, TX · 33 clinicians
- X-Ray Associates of Port Huron P CPlano, TX · 27 clinicians
- Hawaii Diagnostic Radiology Services LLCHonolulu, HI · 15 clinicians
Hospital affiliations
- Baptist Health Medical Center-Little RockLittle Rock, AR
- Marshall Medical CenterPlacerville, CA
- Memorial Medical CenterModesto, CA
- Norman RegionalNorman, OK
- Washington HospitalFremont, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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