Diana Juhee Chang
Endocrinology, Diabetes & Metabolism Physician · Ventura, CA
Diana Juhee Chang is an endocrinology, diabetes & metabolism physician with a practice address in Ventura, California, and NPI 1396142386, issued on Nov 19, 2014. Check the license (California A154454, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diana Juhee Chang
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A154454 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6633 Telephone RD Ste 200, Ventura, CA 93003
- Phone
- (805) 642-8252
- Enumerated
- Nov 19, 2014
- Record last updated
- Jul 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 642-8237
- Medicare enrollment
- Enrolled (PECOS I20210706002296); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 6633 Telephone RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ramin Assadi, MDInterventional Cardiology Physician1942418793
- Amanda Scott, MDInternal Medicine Physician1730495771
Verify Diana Juhee Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A154454Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,558 Medicare Part D claims for 348 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Metformin Hcl Er264 claims
- Levothyroxine Sodium213 claims
- Mounjaro211 claims
- Jardiance159 claims
- Ozempic146 claims
- Trulicity83 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): 86.1 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: $47.27
1 payment: food and beverage; the largest payer was Stryker Corporation. The 5,661 providers of this specialty with any payment received $5,742.15 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
- The Regents OF The University OF CaliforniaPorter Ranch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diana Juhee Chang among 1,131 endocrinology, diabetes & metabolism physician records in California
Diana Juhee Chang is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 80% of them.
- NPI issued2014 · 80% of these records are older, 16% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2016 · median 2003 among the 779 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Ventura → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Susan Ahern, D.O.Ventura, CA 930031508156597
- Ronald Chochinov, MDVentura, CA 930031730116930
- Lauren FicksVentura, CA 930031609912666
- Martha Gonzalez, M.D., M.P.HVentura, CA 930031033261144
- Aldo Ilarde, MDVentura, CA 930031639253735
- Nissar Shah, M.DVentura, CA 930031407078215
- Jeffrey WeiVentura, CA 930031487016952
- Debra Ouyang, MDCamarillo, CA 930101174753826
Common questions
What is Diana Juhee Chang's NPI number?
Diana Juhee Chang's National Provider Identifier (NPI) is 1396142386, issued on Nov 19, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Diana Juhee Chang located?
The NPPES record lists a practice address at 6633 Telephone RD Ste 200, Ventura, CA, 93003. Phone: (805) 642-8252. Providers update this record themselves, so call before visiting.
How can I verify Diana Juhee Chang's license?
NPPES lists California license number A154454, 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 Diana Juhee Chang prescribe under Medicare Part D?
In 2024, Diana Juhee Chang had 2,558 Medicare Part D claims for 348 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Diana Juhee Chang's MIPS final score?
The 2023 MIPS final score is 86.1 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.