Gregory Lee Thalken, MD
Diagnostic Radiology Physician · Long Beach, CA
Gregory Lee Thalken, MD is a diagnostic radiology physician with a practice address in Long Beach, California, and NPI 1861547317, issued on Jan 24, 2007. Check the license (California C162624, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Lee Thalken
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- C162624 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2801 Atlantic Ave, Long Beach, CA 90806
- Phone
- (562) 933-1550
- Enumerated
- Jan 24, 2007
- Record last updated
- May 6, 2026
- Medicare enrollment
- Enrolled (PECOS I20190109002556); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 2801 Atlantic Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Naima Abdirahman, NPAcute Care Nurse Practitioner1215640560
- William AbeClinical Social Worker1316550148
- Holly Adams, MSW, LCSW, OSW-CClinical Social Worker1639591134
- Jennifer Agnew, PHARM. DPharmacist1285435685
- Mannat Agnish, MD, MPHStudent in an Organized Health Care Education/Training Program1881321883
- Mary Elaine Aguilar-Choomngern, NPMedical-Surgical Registered Nurse1033765474
Verify Gregory Lee Thalken in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C162624Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16+ hospitals and group practices
- Lompoc Valley Medical CenterLompoc, CA · Acute Care Hospitals1 of 5 stars
- Arkansas Health GroupLittle Rock, AR
- Capital Health Multispecialty GroupPennington, NJ
- Central Valley Imaging Medical Associates IncPlymouth, MN
- County OF San JoaquinFrench Camp, CA
- Eastpointe Radiologists PCMinneapolis, MN
- Ecm Health Group LLCPlymouth, MN
- Erlanger HealthChattanooga, TN
- Focus Medical ImagingPlymouth, MN
- Fullerton Radiology Medical Group IncMinneapolis, MN
- Hawaii Diagnostic Radiology Services LLCHonolulu, HI
- Insight Chicago IncChicago, IL
- Inspira Health Network Medical Group PCMullica Hill, NJ
- Integrated Imaging Consultants LLCPlymouth, MN
- Kennewick Radiology Group PCPlymouth, MN
- Los Alamitos Radiology Group IncPlymouth, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gregory Lee Thalken among 4,500 diagnostic radiology physician records in California
Gregory Lee Thalken, MD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 41% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2006 · median 2004 among the 3,130 with a school on file
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Long Beach → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Matthew Benedict, M.D.Long Beach, CA 908061528008125
- Richard Chai, MDLong Beach, CA 908061477535532
- Philip Eisinger, DOLong Beach, CA 908061750371852
- Robert Farrell, MDLong Beach, CA 908061952386476
- Richard Hollis, DOLong Beach, CA 908061831119254
- Janice Hwang, MDLong Beach, CA 908061164412763
- Francine Kim, M.D.Long Beach, CA 908061790779783
- Archana Lucchesi, M.D.Long Beach, CA 908061225108533
Common questions
What is Gregory Lee Thalken, MD's NPI number?
Gregory Lee Thalken, MD's National Provider Identifier (NPI) is 1861547317, issued on Jan 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lee Thalken, MD located?
The NPPES record lists a practice address at 2801 Atlantic Ave, Long Beach, CA, 90806. Phone: (562) 933-1550. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lee Thalken, MD's license?
NPPES lists California license number C162624, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.