NPPES file of Aug 9, 2026

Mammietta O. Darko, FNP

Family Nurse Practitioner · Fredericksburg, VA

Mammietta O. Darko, FNP is a family nurse practitioner with a practice address in Fredericksburg, Virginia, and NPI 1891485801, issued on May 11, 2023. Check the license with the Virginia board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891485801
Name
Mammietta O. Darko
Credential
FNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
APRN.CNP.0033484 OH
Self-reported in NPPES; status is on the state search
Practice location
4532 Plank RD, Fredericksburg, VA 22407
Phone
(540) 252-1840
Enumerated
May 11, 2023
Record last updated
Jan 6, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 6,474 in Virginia → Look up another NPI →

Also registered at 4532 Plank RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Shane DavisProfessional Counselor1164071379
  2. Lisa Grooms, P.A.Physician Assistant1821018219
  3. William Johnson, M.D.Pediatrics Physician1295715969
  4. Ashley MangusPediatric Nurse Practitioner1326699307
  5. Amanda Piper, FNP-BCNurse Practitioner1154976314
  6. Bridget Stoddard, FNP-CFamily Nurse Practitioner1114680352

Verify Mammietta O. Darko in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Virginia board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Virginia license search

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98% fewer Medicare Part D claims than the average family nurse practitioner in 2024

32 Medicare Part D claims for 21 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Mammietta Darko32
  2. Specialty average1,305

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.

Mammietta O. Darko among 6,474 family nurse practitioner records in Virginia

Mammietta O. Darko, FNP is one of 6,474 family nurse practitioner records with a practice address in Virginia. 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 2023, is newer than 80% of them.

  • NPI issued2023 · 80% of these records are older, 13% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2026 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

163 family nurse practitioner records list a practice address in Fredericksburg

They are 163 of the 3,696 NPPES records with a practice address in Fredericksburg, and 6,474 family nurse practitioner records in Virginia.

All 6,474 in Virginia → Every provider in Fredericksburg → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Jessica Chavarria, FNP-BCFredericksburg, VA 224071356866297
  2. Stephanie Ferguson, FNPFredericksburg, VA 224071144584293
  3. Barbara Frimpong, NPFredericksburg, VA 224071023368594
  4. Mkiyah Gonzalez, N.PFredericksburg, VA 224071376826248
  5. Teresa Grow, FNP-BCFredericksburg, VA 224071104056233
  6. Kristin Hill, NPFredericksburg, VA 224071881936896
  7. Sarah Kiely, NPFredericksburg, VA 224071639513245
  8. Karin Lanthier, FNPFredericksburg, VA 224071831312412

Common questions

What is Mammietta O. Darko, FNP's NPI number?

Mammietta O. Darko, FNP's National Provider Identifier (NPI) is 1891485801, issued on May 11, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Mammietta O. Darko, FNP located?

The NPPES record lists a practice address at 4532 Plank RD, Fredericksburg, VA, 22407. Phone: (540) 252-1840. Providers update this record themselves, so call before visiting.

How can I verify Mammietta O. Darko, FNP's license?

Search the Virginia board that licenses this profession; the NPPES record confirms identity only.

How much does Mammietta O. Darko, FNP prescribe under Medicare Part D?

In 2024, Mammietta O. Darko, FNP had 32 Medicare Part D claims for 21 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.