Margaret Tuinstra, NP
NPI 1457045981 · Family Nurse Practitioner · Bethesda, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Tuinstra, NP is a Family Nurse Practitioner provider in Bethesda, MD (NPI 1457045981).
Provider details
- NPI number
- 1457045981
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- Yes
- License
- AC005318 (MD)
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 tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
867 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 387 | $120 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 232 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 204 | $84 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 24 | $54 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 20 | $169 |
Typical Medicare-allowed amounts for these services range $14–$169 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 77 | 27 |
| Atorvastatin Calcium | 61 | 22 |
| Metoprolol Succinate | 61 | 25 |
| Amlodipine Besylate | 59 | 27 |
| Furosemide | 35 | 18 |
| Lisinopril | 34 | 13 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-06-07
- Last updated
- 2023-06-07
- Certified
- 2023-03-13
Frequently asked questions
- What is Margaret Tuinstra's NPI number?
- Margaret Tuinstra's National Provider Identifier (NPI) is 1457045981, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Tuinstra's specialty?
- Margaret Tuinstra is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Tuinstra located?
- Margaret Tuinstra's practice location on file with NPPES is 6410 Rockledge Dr, Bethesda, MD 20817-1809.
- What is Margaret Tuinstra's phone number?
- The practice phone number listed in the NPPES registry for Margaret Tuinstra is (301) 897-5307.
- Does Margaret Tuinstra accept Medicare?
- Margaret Tuinstra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Tuinstra's NPI active?
- Yes — Margaret Tuinstra's NPI (1457045981) is active in the NPPES registry as of the last update on 2023-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.