Carolyn Tiernan, MD
NPI 1215947981 · Emergency Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carolyn Tiernan, MD is a Emergency Medicine Physician provider in Oakland, CA (NPI 1215947981).
Provider details
- NPI number
- 1215947981
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- G40571 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Carolyn Tiernan's NPI number?
- Carolyn Tiernan's National Provider Identifier (NPI) is 1215947981, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carolyn Tiernan's specialty?
- Carolyn Tiernan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carolyn Tiernan located?
- Carolyn Tiernan's practice location on file with NPPES is 2107 Livingston St, Oakland, CA 94606-5218.
- What is Carolyn Tiernan's phone number?
- The practice phone number listed in the NPPES registry for Carolyn Tiernan is (510) 436-9000.
- Does Carolyn Tiernan accept Medicare?
- Carolyn Tiernan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carolyn Tiernan's NPI active?
- Yes — Carolyn Tiernan's NPI (1215947981) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.