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ALONSO JOSE MARQUEZ FUENMAYOR MD
NPI 1952928319
Internal Medicine - Pulmonary Disease in Riverside, CA

Active since July 01, 2020PECOS EnrolledAccepts Medicare Assignment
4234 RIVERWALK PKWY STE 230, RIVERSIDE, CA 92505(951) 781-3672(951) 781-0365 Get Directions Write a Review

NPPES record last updated: April 22, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 22, 2026, Jul 1, 2020 (2 updates tracked since 2020).

About Alonso Jose Marquez Fuenmayor Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALONSO JOSE MARQUEZ FUENMAYOR MD (NPI 1952928319) is an individual pulmonary disease provider in Riverside, California, licensed in California (A207686) and active in the NPI registry since July 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1952928319
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameALONSO JOSE MARQUEZ FUENMAYORCredential: MD
Location Address4234 RIVERWALK PKWY STE 230Riverside, CA 92505-3312
Mailing Address4234 Riverwalk Pkwy Ste 230Riverside, CA 92505-3312 · (951) 781-3672 · Fax (951) 781-0365
Phone(951) 781-3672
Fax(951) 781-0365
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateJuly 1, 2020
Last NPPES UpdateApril 22, 20262 updates tracked since enumeration
NPPES CertifiedApril 22, 2026
✔ NPI 1952928319 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in CA · A207686
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal MedicineTaxonomy 207R00000X · License MT229847 (PA), A207686 (CA)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License A207686 (CA)
4234 RIVERWALK PKWY STE 230, Riverside, CA 92505
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alonso Jose Marquez Fuenmayor Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1759791155
PECOS Enrollment IDI20241104003298
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92505 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. SAHAR HAMIDY OSMAN M.D.
Psychiatry & Neurology (Neurocritical Care)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
GLORIA UCHECHUKWU OLEKANMA
Nurse Practitioner (Gerontology)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
REPOSE ANESTHESIA PC
Nurse Anesthetist, Certified Registered
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 509-9204
DR. MONA ALIPOUR M.D
Internal Medicine (Critical Care Medicine)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
DR. FERNANDO SORTO DO
Internal Medicine (Pulmonary Disease)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
ZERON GHAZARIAN M.D.
Internal Medicine (Pulmonary Disease)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
MASOOD AHMAD M.D.
Internal Medicine (Critical Care Medicine)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672
DR. MARTIN MINH HOANG MD
Internal Medicine (Critical Care Medicine)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Riverside County (951) 781-3672

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alonso Marquez Fuenmayor's NPI number?

The NPI number for Alonso Marquez Fuenmayor is 1952928319. It was assigned to this individual provider in the NPPES registry on July 1, 2020.

Where is Alonso Marquez Fuenmayor located?

Alonso Marquez Fuenmayor practices at 4234 Riverwalk Pkwy Ste 230, Riverside, CA 92505. The listed phone number is (951) 781-3672.

What is Alonso Marquez Fuenmayor's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Alonso Marquez Fuenmayor enrolled in Medicare?

Yes. Alonso Marquez Fuenmayor is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Alonso Marquez Fuenmayor was last updated on April 22, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.