George Chang Chien, D.O.
Interventional Pain Medicine Physician · Ventura, CA
George Chang Chien, D.O. is an interventional pain medicine physician with a practice address in Ventura, California, and NPI 1346565280, issued on Apr 4, 2010. Check the license (California 20A14068, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- George Chang Chien
- Credential
- D.O.
- Primary taxonomy
- Interventional Pain Medicine Physician 208VP0014X
- License number
- 20A14068 CA
Self-reported in NPPES; status is on the state search - Practice location
- 133 W Santa Clara St, Ventura, CA 93001
- Phone
- (805) 641-5600
- Enumerated
- Apr 4, 2010
- Record last updated
- Dec 5, 2024
- Medicare enrollment
- Enrolled (PECOS I20151103000571); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 2010
- Entity
- Type 1 · individual
8 nearest interventional pain medicine physician records → All 219 in California → Look up another NPI →
Also registered at 133 W Santa Clara St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Benson, M.D.Orthopaedic Surgery Physician1861411753
- Sean Early, MDOrthopaedic Surgery Physician1972595221
- Wendy Francke, M.D.Family Medicine Physician1053477646
- Isabel Gonzalez Diaz, M.D.Family Medicine Physician1750670410
- Damayea Hargett, MDOrthopaedic Surgery Physician1669634101
- Casey Lowe, PA-CPhysician Assistant1376133660
Verify George Chang Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14068Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average interventional pain medicine physician in 2024
849 Medicare Part D claims for 92 beneficiaries, against an average of 2,306 among the 2,100 providers of this specialty who prescribed in Part D. 443 claims were for opioids.
Most prescribed
- Tramadol Hcl184 claims
- Hydrocodone-Acetaminophen178 claims
- Gabapentin96 claims
- Pregabalin58 claims
- Baclofen41 claims
- Meloxicam39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,162.27
34 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 1,966 providers of this specialty with any payment received $3,889.53 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- County OF VenturaVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
George Chang Chien among 219 interventional pain medicine physician records in California
George Chang Chien, D.O. is one of 219 interventional pain medicine physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 71% of them.
- NPI issued2010 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2010 · median 2003 among the 167 with a school on file
- Record last updated2024 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208VP0014X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Interventional Pain Medicine Physician providers in California
There are 219 interventional pain medicine physician records in California.
All 219 in California → Every provider in Ventura → Interventional Pain Medicine Physician nationwide →
The 8 interventional pain medicine physician records with the nearest ZIP codes
- Estela Diesfeld, MDVentura, CA 930031376652909
- Robert Frey, M.D.Ventura, CA 930031912934779
- Stephen Shaw, M.D.Ventura, CA 930031215964994
- Patrick Buchanan, M.D.Camarillo, CA 930101275828568
- Joseph Cabaret, MDCamarillo, CA 930101689600041
- David Lee, MDYorba Linda, CA 928861558523928
- Andrew Germanovich, D.O., M.S.Orange, CA 928681043479835
- Standiford Helm, M.D.Orange, CA 928681437156627
Common questions
What is George Chang Chien, D.O.'s NPI number?
George Chang Chien, D.O.'s National Provider Identifier (NPI) is 1346565280, issued on Apr 4, 2010. An NPI identifies a provider in billing; it is not a license.
Where is George Chang Chien, D.O. located?
The NPPES record lists a practice address at 133 W Santa Clara St, Ventura, CA, 93001. Phone: (805) 641-5600. Providers update this record themselves, so call before visiting.
How can I verify George Chang Chien, D.O.'s license?
NPPES lists California license number 20A14068, 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.
How much does George Chang Chien, D.O. prescribe under Medicare Part D?
In 2024, George Chang Chien, D.O. had 849 Medicare Part D claims for 92 beneficiaries; the average among interventional pain medicine physician prescribers was 2,306. Part D covers Medicare prescriptions only.
What is George Chang Chien, D.O.'s MIPS final score?
The 2023 MIPS final score is 87.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.