Masako Longwell
NPI 1245012673 · Psychiatric/Mental Health Nurse Practitioner · Alexandria, VA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Masako Longwell is a Psychiatric/Mental Health Nurse Practitioner provider in Alexandria, VA (NPI 1245012673).
Provider details
- NPI number
- 1245012673
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 0024189206 (VA)
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 tenure33% of score
2 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Divalproex Sodiumbrand: Divalproex Sodium Er | 33 |
| Olanzapine | 25 |
| Haloperidol Decanoate | 23 |
| Benztropine Mesylate | 20 |
| Haloperidol | 18 |
| Bupropion Hclbrand: Bupropion Xl | 17 |
| Trifluoperazine Hcl | 14 |
| Buspirone Hcl | 14 |
| Divalproex Sodium | 13 |
| Cariprazine Hclbrand: Vraylar | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$305 across 11 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
Registry dates
- Enumerated
- 2023-10-19
- Last updated
- 2024-04-05
- Certified
- 2024-04-05
Frequently asked questions
- What is Masako Longwell's NPI number?
- Masako Longwell's National Provider Identifier (NPI) is 1245012673, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Masako Longwell's specialty?
- Masako Longwell is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Masako Longwell located?
- Masako Longwell's practice location on file with NPPES is 8119 Holland Rd, Alexandria, VA 22306-3135.
- What is Masako Longwell's phone number?
- The practice phone number listed in the NPPES registry for Masako Longwell is (571) 234-0403.
- Does Masako Longwell accept Medicare?
- Masako Longwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Masako Longwell's NPI active?
- Yes — Masako Longwell's NPI (1245012673) is active in the NPPES registry as of the last update on 2024-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.