Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alfredo Alejandro Fiallo, M.D.

Anesthesiology Physician in San Diego, CA · enumerated 2011 · practices at Anesthesia Service Medical Group.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235421801

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Registry record

Entity type Individual (Type 1)

Name Alfredo Alejandro Fiallo

Credential M.D.

Sex Male

Practice address 3626 Ruffin Rd, San Diego, CA, 92123

Phone (858) 565-9666

Enumeration date May 13, 2011

Last updated in NPPES Nov 1, 2019

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License A154912 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Alfredo Fiallo practice?

The practice location on file with NPPES is in San Diego, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alfredo Fiallo?

The National Provider Identifier (NPI) for Alfredo Fiallo is 1235421801, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-01.