Sara Wallenius Mertz, A/GNP
Nurse Practitioner · Asheville, NC
Sara Wallenius Mertz, A/GNP is a nurse practitioner with a practice address in Asheville, North Carolina, and NPI 1124063300, issued on Jun 19, 2006. Check the license (North Carolina 5005118, as entered in NPPES) with the North Carolina board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sara Wallenius Mertz
- Credential
- A/GNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 5005118 NC
200950150NP OR
99007553N4 OR
Self-reported in NPPES; status is on the state search - Practice location
- 286 Overlook RD, Asheville, NC 28803
- Phone
- (828) 213-8442
- Enumerated
- Jun 19, 2006
- Record last updated
- Mar 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 292676 OR
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,524 in North Carolina → Look up another NPI →
Also registered at 286 Overlook RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jamie Cronquist, PHARMDPharmacist1811246432
- Christopher Patterson, MDInternal Medicine Physician1417920646
- Leah WestendorfFamily Nurse Practitioner1407774466
Verify Sara Wallenius Mertz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich North Carolina board licenses this profession
Search for license 5005118Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average nurse practitioner in 2024
144 Medicare Part D claims for 16 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Simvastatin25 claims
- Amlodipine Besylate13 claims
- Clonidine Hcl13 claims
- Hydrochlorothiazide13 claims
- Lisinopril12 claims
- Montelukast Sodium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Sara Wallenius Mertz among 4,524 nurse practitioner records in North Carolina
Sara Wallenius Mertz, A/GNP is one of 4,524 nurse practitioner records with a practice address in North Carolina. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 85% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2019 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
198 nurse practitioner records list a practice address in Asheville
They are 198 of the 8,173 NPPES records with a practice address in Asheville, and 4,524 nurse practitioner records in North Carolina.
All 4,524 in North Carolina → Every provider in Asheville → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Stephanie Anderson, RNMSNAsheville, NC 288031366656761
- Lee Boyd, ARNPAsheville, NC 288031295700573
- Shawn Fiora, NPAsheville, NC 288031376675389
- Mary Girardi, N.P.Asheville, NC 288031427279256
- Linda Harwood, FNPAsheville, NC 288031598719122
- Rani Khan, RN, MSN, CNMAsheville, NC 288031073570966
- Susan Koesters, F.N.P.Asheville, NC 288031063599603
- Susan Meade, NURSE PRACTICTIONERAsheville, NC 288031346344819
Common questions
What is Sara Wallenius Mertz, A/GNP's NPI number?
Sara Wallenius Mertz, A/GNP's National Provider Identifier (NPI) is 1124063300, issued on Jun 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sara Wallenius Mertz, A/GNP located?
The NPPES record lists a practice address at 286 Overlook RD, Asheville, NC, 28803. Phone: (828) 213-8442. Providers update this record themselves, so call before visiting.
How can I verify Sara Wallenius Mertz, A/GNP's license?
NPPES lists North Carolina license number 5005118, as entered by the provider. Search the North Carolina board that licenses this profession; the NPPES record confirms identity only.
How much does Sara Wallenius Mertz, A/GNP prescribe under Medicare Part D?
In 2024, Sara Wallenius Mertz, A/GNP had 144 Medicare Part D claims for 16 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.