CAROLYN TIERNAN MD
NPI 1215947981
Emergency Medicine in Oakland, CA
About Carolyn Tiernan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CAROLYN TIERNAN MD (NPI 1215947981) is an individual emergency medicine provider in Oakland, California, licensed in California (G40571) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (1978).
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
Carolyn Tiernan 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.
Medicare Billing Reassignment
Medicare enrollment records show Carolyn Tiernan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bishop, CA 93514
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Northern Inyo Healthcare District
- Also billed through NPI 1922198712 (California)
- 131 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94606 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 11
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 Carolyn Tiernan's NPI number?
The NPI number for Carolyn Tiernan is 1215947981. It was assigned to this individual provider in the NPPES registry on August 8, 2006.
Where is Carolyn Tiernan located?
Carolyn Tiernan practices at 2107 Livingston St Suite A, Oakland, CA 94606. The listed phone number is (510) 436-9000.
What is Carolyn Tiernan's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Carolyn Tiernan enrolled in Medicare?
Yes. Carolyn Tiernan 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 Carolyn Tiernan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carolyn Tiernan reassigns Medicare benefits to Northern Inyo Associates (Bishop, 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 Carolyn Tiernan'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 Carolyn Tiernan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Carolyn Tiernan, MD · NPI 1215947981
Emergency Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since August 8, 2006.
## Identity
- **NPI:** 1215947981 (Entity type: Individual)
- **Enumerated:** August 8, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G40571 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2107 LIVINGSTON ST, SUITE A, Oakland, CA 94606-5218
- **Phone:** (510) 436-9000 · **Fax:** (510) 436-9013
## 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:** Northern Inyo Associates (NPI 1649664848, Bishop, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 1978
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1215947981) · Data from the CMS NPPES public registry.