Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Joseph Manuel Alonzo, MD

Individual provider Internal Medicine Physician · NPI 1225077050

Dr. Joseph Manuel Alonzo, MD is an Internal Medicine in Covina, California. Graduated from University of California, Geffen School of Medicine in 1984, 42 years ago. Practices with Healthcare Partners Affiliates Medical Group, a 790-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
42
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

420 W Rowland St
Covina, CA 91723-2943
Phone: (626) 331-6411
Fax: (626) 251-1559
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A45798 (CA)

Record details

NPI number1225077050
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 6, 2006
Last updated in NPPESDecember 3, 2025
Certification dateDecember 3, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice Healthcare Partners Affiliates Medical Group — 790 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Covina