Marissa Kleffman Underwood, ARNP
NPI 1144691528 · Family Nurse Practitioner · Greenville, NC
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Kleffman Underwood, ARNP is a Family Nurse Practitioner provider in Greenville, NC (NPI 1144691528).
Provider details
- NPI number
- 1144691528
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- No
- License
- 5008128 (NC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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 tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
387 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 96 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 91 | $72 |
| Hemoglobin A1c Level83036 | 46 | $10 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 38 | $13 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 32 | $97 |
| Blood Test, Lipids (cholesterol and Triglycerides) |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 160 | 58 |
| Amlodipine Besylate | 97 | 36 |
| Metoprolol Succinate | 92 | 29 |
| Lisinopril | 80 | 28 |
| Rosuvastatin Calcium | 60 | 19 |
| Omeprazole | 60 | 19 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$116 across 6 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 (2)
- 4500 San Pablo Rd SJacksonville, FL 32224-1865Phone: (904) 953-2000
- 381 Ruin Creek RdHenderson, NC 27536-2932Phone: (252) 430-0666Fax: (252) 430-7503
Registry dates
- Enumerated
- 2015-10-12
- Last updated
- 2024-02-16
- Certified
- 2024-02-16
Frequently asked questions
- What is Marissa Kleffman Underwood's NPI number?
- Marissa Kleffman Underwood's National Provider Identifier (NPI) is 1144691528, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Kleffman Underwood's specialty?
- Marissa Kleffman Underwood is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Kleffman Underwood located?
- Marissa Kleffman Underwood's practice location on file with NPPES is 1204 E Fire Tower Rd, Greenville, NC 27858-4196.
- What is Marissa Kleffman Underwood's phone number?
- The practice phone number listed in the NPPES registry for Marissa Kleffman Underwood is (252) 744-1122.
- Does Marissa Kleffman Underwood accept Medicare?
- Marissa Kleffman Underwood is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Kleffman Underwood's NPI active?
- Yes — Marissa Kleffman Underwood's NPI (1144691528) is active in the NPPES registry as of the last update on 2024-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.