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

Alonso Jose Marquez Fuenmayor, MD

Individual provider Pulmonary Disease Physician · NPI 1952928319

Alonso Jose Marquez Fuenmayor, MD is an Internal Medicine in Riverside, California. Qualified in 2015, 11 years ago. Practices with Christiana Care Health Services Inc, a 1,481-clinician group and accepts Medicare assignment. Licensed in California and Pennsylvania.

Years since qualifying
11
Licensed in
CA, PA
In the registry since
2020
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4234 Riverwalk Pkwy Ste 230
Riverside, CA 92505-3312
Phone: (951) 781-3672
Fax: (951) 781-0365
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence A207686 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MT229847 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A207686 (CA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence A207686 (CA)

Record details

NPI number1952928319
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 1, 2020
Last updated in NPPESApril 22, 2026
Certification dateApril 22, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Christiana Care Health Services Inc — 1481 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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