DR. JOHN J. TIERNEY M.D.
NPI 1952595076
Student in an Organized Health Care Education/Training Program in Los Angeles, CA
About Dr. John J. Tierney M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN J. TIERNEY M.D. (NPI 1952595076) is an individual student in an organized health care education/training program in Los Angeles, California and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (2006).
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
Dr. John J. Tierney 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 Reassignment
Medicare enrollment records show John Tierney reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90034
- Reassigned Medicare billing, California enrollment
- 13,921 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.
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 John Tierney's NPI number?
The NPI number for John Tierney is 1952595076. It was assigned to this individual provider in the NPPES registry on August 31, 2007.
Where is John Tierney located?
John Tierney practices at 10543 Ayres Avenue, Los Angeles, CA 90064. The listed phone number is (949) 838-4883.
What is John Tierney's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is John Tierney enrolled in Medicare?
Yes. John Tierney 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 organization bills Medicare for John Tierney's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Tierney reassigns Medicare benefits to Southern California Permanente Medical Group (Los Angeles, CA). The 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 John Tierney'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 John Tierney was last updated on November 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. John J. Tierney, M.D. · NPI 1952595076
Student in an Organized Health Care Education/Training Program provider in Los Angeles, California. Individual provider, active in the CMS NPPES registry since August 31, 2007.
## Identity
- **NPI:** 1952595076 (Entity type: Individual)
- **Enumerated:** August 31, 2007
- **Primary specialty:** Student in an Organized Health Care Education/Training Program · taxonomy 390200000X
- **Sole proprietor:** Yes
## Practice location
- **Address:** 10543 AYRES AVENUE, Los Angeles, CA 90064
- **Phone:** (949) 838-4883
## 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:** Southern California Permanente Medical Group (NPI 1043242563, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 2006
## Record status
- **NPPES last updated:** November 30, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1952595076) · Data from the CMS NPPES public registry.