Marie Johnston, FNP-BC
NPI 1528505377 · Family Nurse Practitioner · Montclair, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marie Johnston, FNP-BC is a Family Nurse Practitioner provider in Montclair, CA (NPI 1528505377).
Provider details
- NPI number
- 1528505377
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95004376 (CA)
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
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- 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 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Quetiapine Fumarate | 11 |
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$18 across 1 record (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
Additional practice locations (1)
- 14355 Miranda WayLos Altos Hills, CA 94022-2032Phone: (888) 731-8994Fax: (833) 775-1861
Registry dates
- Enumerated
- 2017-01-31
- Last updated
- 2023-08-28
- Certified
- 2023-08-28
Frequently asked questions
- What is Marie Johnston's NPI number?
- Marie Johnston's National Provider Identifier (NPI) is 1528505377, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marie Johnston's specialty?
- Marie Johnston is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marie Johnston located?
- Marie Johnston's practice location on file with NPPES is 9635 Monte Vista Ave Ste 205, Montclair, CA 91763-2235.
- What is Marie Johnston's phone number?
- The practice phone number listed in the NPPES registry for Marie Johnston is (909) 449-9328.
- Does Marie Johnston accept Medicare?
- Marie Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marie Johnston's NPI active?
- Yes — Marie Johnston's NPI (1528505377) is active in the NPPES registry as of the last update on 2023-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.