Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. John Reinier Favor Narvaez, MD, MPH

Individual provider Surgery Physician · NPI 1396131850

Dr. John Reinier Favor Narvaez, MD, MPH practises General Surgery in Torrance, California. Graduated from University of California, San Francisco School of Medicine in 2015, 11 years ago. Practices with Guam Healthcare Development Incorporated, a 209-clinician group and accepts Medicare assignment. Licensed in California, Guam and New York.

Years since qualifying
11
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA, GU, NY
In the registry since
2015
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MPH — Master of Public Health
A graduate degree in population health.

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Practice location Address checks out

1000 W Carson St
Torrance, CA 90502-2004
Phone: (424) 306-4000
Show map & directions

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence A177676 (CA)
Surgery Physician Taxonomy 208600000X · Licence M-2371 (GU)
Surgery Physician Taxonomy 208600000X · Licence 291376 (NY)
Surgical Critical Care Physician Taxonomy 2086S0102X · Licence M-2371 (GU)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1396131850
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MPH
Sole proprietorNo
NPI enumeratedApril 11, 2015
Last updated in NPPESOctober 27, 2023
Certification dateMay 10, 2023

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Guam Healthcare Development Incorporated — 209 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of tissue 17 times · 67th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 12 times · 44th percentile
Colonoscopy 1–10 times
Hernia repair - groin (open) 1–10 times
Leg revascularization (restoring blood flow) 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients149
Services billed 276 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Guam Healthcare Development Incorporated

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 209 clinicians in the practice; 12 are shown here.

Other providers in Torrance