Caroline Elizabeth Loyce Duffy, MD
Student in an Organized Health Care Education/Training Program · Chula Vista, CA
Caroline Elizabeth Loyce Duffy, MD is a student in an organized health care education/training program with a practice address in Chula Vista, California, and NPI 1376248435, issued on Mar 30, 2023. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Caroline Elizabeth Loyce Duffy
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 450 Fourth Ave Ste 212, Chula Vista, CA 91910
- Phone
- (619) 691-7587
- Enumerated
- Mar 30, 2023
- Record last updated
- Jul 9, 2025
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Verify Caroline Elizabeth Loyce Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
181 Medicare Part D claims for 36 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D.
Most prescribed
- Meclizine Hcl14 claims
- Atorvastatin Calcium12 claims
- Gabapentin12 claims
- Lisinopril11 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.
Caroline Elizabeth Loyce Duffy among 40,652 student in an organized health care education/training program records in California
Caroline Elizabeth Loyce Duffy, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 42% of them.
- NPI issued2023 · 42% of these records are older, 47% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileNo · 6% of these records are
- Record last updated2025 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
92 student in an organized health care education/training program records list a practice address in Chula Vista
They are 92 of the 5,329 NPPES records with a practice address in Chula Vista, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Chula Vista → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Jessica CheChula Vista, CA 919101487167284
- Kathleen Douangchak, DOChula Vista, CA 919101942996269
- Pamela ElguezabalChula Vista, CA 919101255828695
- Jimmy FaddisChula Vista, CA 919101922660695
- Rebecca Fuentes, NP STUDENTChula Vista, CA 919101679116859
- Jacob Habeeb, DOChula Vista, CA 919101386031730
- Alexandra Hamb, MD, MPHChula Vista, CA 919101316406150
- Jacqueline Hearndon-Sessoms, B.A.,Chula Vista, CA 919101124412531
Common questions
What is Caroline Elizabeth Loyce Duffy, MD's NPI number?
Caroline Elizabeth Loyce Duffy, MD's National Provider Identifier (NPI) is 1376248435, issued on Mar 30, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Caroline Elizabeth Loyce Duffy, MD located?
The NPPES record lists a practice address at 450 Fourth Ave Ste 212, Chula Vista, CA, 91910. Phone: (619) 691-7587. Providers update this record themselves, so call before visiting.
How can I verify Caroline Elizabeth Loyce Duffy, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Caroline Elizabeth Loyce Duffy, MD prescribe under Medicare Part D?
In 2024, Caroline Elizabeth Loyce Duffy, MD had 181 Medicare Part D claims for 36 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
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.