Marizthel Guiab, DNP, FNP-C
NPI 1720597990 · Nurse Practitioner · Westchester, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marizthel Guiab, DNP, FNP-C is a Nurse Practitioner provider in Westchester, IL (NPI 1720597990).
Provider details
- NPI number
- 1720597990
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 209016507 (IL)
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 tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
476 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 343 | $94 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 114 | $65 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 19 | $168 |
Typical Medicare-allowed amounts for these services range $65–$168 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Risperidone | 163 | 16 |
| Divalproex Sodium | 162 | 27 |
| Memantine Hcl | 112 | 13 |
| Valbenazine Tosylatebrand: Ingrezza | 107 | — |
| Deutetrabenazinebrand: Austedo Xr | 103 | — |
| Hydroxyzine Hcl | 98 | 16 |
| Quetiapine Fumarate | 96 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$7,211 across 22 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
- 2017-09-20
- Last updated
- 2017-09-20
Frequently asked questions
- What is Marizthel Guiab's NPI number?
- Marizthel Guiab's National Provider Identifier (NPI) is 1720597990, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marizthel Guiab's specialty?
- Marizthel Guiab is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marizthel Guiab located?
- Marizthel Guiab's practice location on file with NPPES is 1 Westbrook Corporate Ctr Ste 300, Westchester, IL 60154-5709.
- What is Marizthel Guiab's phone number?
- The practice phone number listed in the NPPES registry for Marizthel Guiab is (877) 906-9699.
- Does Marizthel Guiab accept Medicare?
- Marizthel Guiab is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marizthel Guiab's NPI active?
- Yes — Marizthel Guiab's NPI (1720597990) is active in the NPPES registry as of the last update on 2017-09-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.