Olivia Castellanos
NPI 1821551599 · Family Nurse Practitioner · Rockford, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Olivia Castellanos is a Family Nurse Practitioner provider in Rockford, IL (NPI 1821551599).
Provider details
- NPI number
- 1821551599
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 209019112 (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 tenure28% of score
7 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
1,556 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 363 | $94 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 341 | $94 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 301 | $134 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 187 | $134 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 142 | $65 |
| Advance Care Planning, First 30 Minutes |
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 |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 62 | 21 |
| Warfarin Sodium | 53 | — |
| Potassium Chloride | 53 | 21 |
| Apixabanbrand: Eliquis | 48 | 14 |
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 40 | 23 |
| Clozapine | 28 | — |
| Mirtazapine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-10
- Last updated
- 2019-04-10
Frequently asked questions
- What is Olivia Castellanos's NPI number?
- Olivia Castellanos's National Provider Identifier (NPI) is 1821551599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olivia Castellanos's specialty?
- Olivia Castellanos is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Olivia Castellanos located?
- Olivia Castellanos's practice location on file with NPPES is 2222 E State St Ste 209, Rockford, IL 61104-1572.
- What is Olivia Castellanos's phone number?
- The practice phone number listed in the NPPES registry for Olivia Castellanos is (815) 988-8500.
- Does Olivia Castellanos accept Medicare?
- Olivia Castellanos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Olivia Castellanos's NPI active?
- Yes — Olivia Castellanos's NPI (1821551599) is active in the NPPES registry as of the last update on 2019-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.