ALFREDO ALEJANDRO FIALLO M.D.
NPI 1235421801
Anesthesiology in San Diego, CA
About Alfredo Alejandro Fiallo M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALFREDO ALEJANDRO FIALLO M.D. (NPI 1235421801) is an individual anesthesiology provider in San Diego, California, licensed in California (A154912) and active in the NPI registry since May 2011. He is enrolled in Medicare PECOS and is a graduate of University Of Texas Southwestern Medical School At Dallas (2011).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alfredo Alejandro Fiallo M.d. 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.
Medicare Billing Reassignments
2Medicare enrollment records show Alfredo Fiallo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 269 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 251 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
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 Alfredo Fiallo's NPI number?
The NPI number for Alfredo Fiallo is 1235421801. It was assigned to this individual provider in the NPPES registry on May 13, 2011.
Where is Alfredo Fiallo located?
Alfredo Fiallo practices at 3626 Ruffin Rd, San Diego, CA 92123. The listed phone number is (858) 565-9666.
What is Alfredo Fiallo's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Alfredo Fiallo enrolled in Medicare?
Yes. Alfredo Fiallo 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.
Which organizations bill Medicare for Alfredo Fiallo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alfredo Fiallo reassigns Medicare benefits to 2 organizations: Anesthesia Service Medical Group (San Diego, CA) and Regents Of The University Of California (San Diego, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alfredo Fiallo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Alfredo Fiallo was last updated on November 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Alfredo Alejandro Fiallo, M.D. · NPI 1235421801
Anesthesiology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since May 13, 2011.
## Identity
- **NPI:** 1235421801 (Entity type: Individual)
- **Enumerated:** May 13, 2011
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A154912 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3626 RUFFIN RD, San Diego, CA 92123-1810
- **Phone:** (858) 565-9666
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Anesthesia Service Medical Group (NPI 1053354233, San Diego, CA); Regents Of The University Of California (NPI 1356444897, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Southwestern Medical School At Dallas, class of 2011
## Record status
- **NPPES last updated:** November 1, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1235421801) · Data from the CMS NPPES public registry.