Christina Johnstone, MSN, RN, FNP
NPI 1235438839 · Adult Health Nurse Practitioner · New York, NY
Christina Johnstone, MSN, RN, FNP is a Adult Health Nurse Practitioner provider in New York, NY (NPI 1235438839).
Provider details
- NPI number
- 1235438839
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, RN, FNP
- Sex
- Female
- Sole proprietor
- No
- License
- F333550 (NY)
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 tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Zolpidem Tartrate | 25 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 17 |
| Bupropion Hclbrand: Bupropion Xl | 16 |
| Diazepam | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-03-22
- Last updated
- 2011-03-22
Frequently asked questions
- What is Christina Johnstone's NPI number?
- Christina Johnstone's National Provider Identifier (NPI) is 1235438839, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christina Johnstone's specialty?
- Christina Johnstone is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Christina Johnstone located?
- Christina Johnstone's practice location on file with NPPES is 130 E 18th St, New York, NY 10003-2416.
- What is Christina Johnstone's phone number?
- The practice phone number listed in the NPPES registry for Christina Johnstone is (212) 473-7798.
- Is Christina Johnstone's NPI active?
- Yes — Christina Johnstone's NPI (1235438839) is active in the NPPES registry as of the last update on 2011-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.