Margaret Ann Tuinstra, NP
Family Nurse Practitioner · Bethesda, MD
Margaret Ann Tuinstra, NP is a family nurse practitioner with a practice address in Bethesda, Maryland, and NPI 1457045981, issued on Jun 7, 2023. Check the license (Maryland AC005318, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Ann Tuinstra
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- AC005318 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6410 Rockledge Dr, Bethesda, MD 20817
- Phone
- (301) 897-5307
- Enumerated
- Jun 7, 2023
- Record last updated
- Jun 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20231021000682); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Also registered at 6410 Rockledge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Ann Tuinstra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license AC005318Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average family nurse practitioner in 2024
656 Medicare Part D claims for 184 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Eliquis77 claims
- Atorvastatin Calcium61 claims
- Metoprolol Succinate61 claims
- Amlodipine Besylate59 claims
- Furosemide35 claims
- Lisinopril34 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.
Bills Medicare through one group practice
- Johns Hopkins Community Physicians, IncLaurel, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Ann Tuinstra among 4,124 family nurse practitioner records in Maryland
Margaret Ann Tuinstra, NP is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% 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 78% of them.
- NPI issued2023 · 78% of these records are older, 14% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2022 · median 2019 among the 2,370 with a school on file
- Record last updated2023 · 41% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
185 family nurse practitioner records list a practice address in Bethesda
They are 185 of the 7,245 NPPES records with a practice address in Bethesda, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Bethesda → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Bethlehem Addis, NPBethesda, MD 208171417445107
- Savannah Adrian, CRNPBethesda, MD 208171609468271
- Deirdre Angelastro, FNPBethesda, MD 208171710333281
- Haja Fatmata Bah, CRNPBethesda, MD 208171457989949
- Deidre Fisher, APRN- FNPBethesda, MD 208171144703299
- Erica HindsBethesda, MD 208171437880754
- Touko Leuga, NPBethesda, MD 208171174132682
- Meghan Love, FNP-CBethesda, MD 208171023996303
Common questions
What is Margaret Ann Tuinstra, NP's NPI number?
Margaret Ann Tuinstra, NP's National Provider Identifier (NPI) is 1457045981, issued on Jun 7, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Ann Tuinstra, NP located?
The NPPES record lists a practice address at 6410 Rockledge Dr, Bethesda, MD, 20817. Phone: (301) 897-5307. Providers update this record themselves, so call before visiting.
How can I verify Margaret Ann Tuinstra, NP's license?
NPPES lists Maryland license number AC005318, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Ann Tuinstra, NP prescribe under Medicare Part D?
In 2024, Margaret Ann Tuinstra, NP had 656 Medicare Part D claims for 184 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.
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.