Maria Rivera, CNM, FNP
NPI 1558582171 · Family Nurse Practitioner · Crystal City, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Rivera, CNM, FNP is a Family Nurse Practitioner provider in Crystal City, TX (NPI 1558582171).
Provider details
- NPI number
- 1558582171
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNM, FNP
- Sex
- Female
- Sole proprietor
- No
- License
- AP110357 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
36 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 19 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 17 | $8 |
Typical Medicare-allowed amounts for these services range $8–$10 (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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 49 | 25 |
| Levothyroxine Sodium | 46 | 18 |
| Omeprazole | 28 | 15 |
| Losartan Potassium | 27 | 12 |
| Amlodipine Besylate | 26 | 11 |
| Hydrochlorothiazide | 25 | — |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-01
- Last updated
- 2024-02-27
- Certified
- 2024-02-27
Frequently asked questions
- What is Maria Rivera's NPI number?
- Maria Rivera's National Provider Identifier (NPI) is 1558582171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Rivera's specialty?
- Maria Rivera is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maria Rivera located?
- Maria Rivera's practice location on file with NPPES is 308 S Cesar Chavez Ave, Crystal City, TX 78839-4200.
- What is Maria Rivera's phone number?
- The practice phone number listed in the NPPES registry for Maria Rivera is (830) 374-2301.
- Does Maria Rivera accept Medicare?
- Maria Rivera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Rivera's NPI active?
- Yes — Maria Rivera's NPI (1558582171) is active in the NPPES registry as of the last update on 2024-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.