Tammy Warren, APRN
NPI 1538794565 · Family Nurse Practitioner · Portsmouth, VA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Warren, APRN is a Family Nurse Practitioner provider in Portsmouth, VA (NPI 1538794565).
Provider details
- NPI number
- 1538794565
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 23687 (SC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-03-10
- Last updated
- 2023-05-08
- Certified
- 2023-04-18
Frequently asked questions
- What is Tammy Warren's NPI number?
- Tammy Warren's National Provider Identifier (NPI) is 1538794565, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Warren's specialty?
- Tammy Warren is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy Warren located?
- Tammy Warren's practice location on file with NPPES is 620 John Paul Jones Cir, Portsmouth, VA 23708-2111.
- What is Tammy Warren's phone number?
- The practice phone number listed in the NPPES registry for Tammy Warren is (757) 953-5000.
- Does Tammy Warren accept Medicare?
- Tammy Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Warren's NPI active?
- Yes — Tammy Warren's NPI (1538794565) is active in the NPPES registry as of the last update on 2023-05-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.