Amy Marks, FNP-C
NPI 1821575325 · Family Nurse Practitioner · Visalia, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Amy Marks, FNP-C is a Family Nurse Practitioner provider in Visalia, CA (NPI 1821575325).
Provider details
- NPI number
- 1821575325
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 95009489 (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
7 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 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 128 | 35 |
| Lisinopril | 119 | 30 |
| Amlodipine Besylate | 96 | 22 |
| Gabapentin | 82 | 21 |
| Metformin Hcl | 68 | 19 |
| Omeprazole | 66 | 20 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 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
Registry dates
- Enumerated
- 2018-07-26
- Last updated
- 2018-07-26
Frequently asked questions
- What is Amy Marks's NPI number?
- Amy Marks's National Provider Identifier (NPI) is 1821575325, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Amy Marks's specialty?
- Amy Marks is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Amy Marks located?
- Amy Marks's practice location on file with NPPES is 400 E Oak Ave, Visalia, CA 93291-5034.
- What is Amy Marks's phone number?
- The practice phone number listed in the NPPES registry for Amy Marks is (877) 960-3426.
- Does Amy Marks accept Medicare?
- Amy Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Amy Marks's NPI active?
- Yes — Amy Marks's NPI (1821575325) is active in the NPPES registry as of the last update on 2018-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.