Karol Duffy, NP
NPI 1225606338 · Family Nurse Practitioner · South Riding, VA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karol Duffy, NP is a Family Nurse Practitioner provider in South Riding, VA (NPI 1225606338).
Provider details
- NPI number
- 1225606338
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 0024181264 (VA)
Specialties & taxonomies
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
5 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
- 2021-06-15
- Last updated
- 2021-06-15
- Certified
- 2021-06-15
Frequently asked questions
- What is Karol Duffy's NPI number?
- Karol Duffy's National Provider Identifier (NPI) is 1225606338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karol Duffy's specialty?
- Karol Duffy is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karol Duffy located?
- Karol Duffy's practice location on file with NPPES is 26035 Murrey Dr, South Riding, VA 20152-3600.
- What is Karol Duffy's phone number?
- The practice phone number listed in the NPPES registry for Karol Duffy is (703) 327-5211.
- Does Karol Duffy accept Medicare?
- Karol Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karol Duffy's NPI active?
- Yes — Karol Duffy's NPI (1225606338) is active in the NPPES registry as of the last update on 2021-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.