Karen Mayo, MSN RN FNP-BC CWON
NPI 1134713688 · Family Nurse Practitioner · Greensboro, NC
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Mayo, MSN RN FNP-BC CWON is a Family Nurse Practitioner provider in Greensboro, NC (NPI 1134713688).
Provider details
- NPI number
- 1134713688
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN RN FNP-BC CWON
- Sex
- Female
- Sole proprietor
- No
- License
- 5013712 (NC)
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 tenure25% of score
5 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
130 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $52 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 24 | $106 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $77 |
Typical Medicare-allowed amounts for these services range $52–$106 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$102 across 2 records (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
Additional practice locations (1)
- 301 E Wendover Ave Ste 111Greensboro, NC 27401-1209Phone: (336) 832-7840Fax: (336) 832-3285
Registry dates
- Enumerated
- 2021-02-25
- Last updated
- 2026-05-07
- Certified
- 2026-05-07
Frequently asked questions
- What is Karen Mayo's NPI number?
- Karen Mayo's National Provider Identifier (NPI) is 1134713688, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Mayo's specialty?
- Karen Mayo is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Mayo located?
- Karen Mayo's practice location on file with NPPES is 1121 N Church St, Greensboro, NC 27401.
- What is Karen Mayo's phone number?
- The practice phone number listed in the NPPES registry for Karen Mayo is (336) 953-1889.
- Does Karen Mayo accept Medicare?
- Karen Mayo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Mayo's NPI active?
- Yes — Karen Mayo's NPI (1134713688) is active in the NPPES registry as of the last update on 2026-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.