Rachael Demattei, APRN
NPI 1891443289 · Nurse Practitioner · O Fallon, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rachael Demattei, APRN is a Nurse Practitioner provider in O Fallon, IL (NPI 1891443289).
Provider details
- NPI number
- 1891443289
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 041495134 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
4 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
78 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 42 | $124 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 21 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 15 | $9 |
Typical Medicare-allowed amounts for these services range $9–$124 (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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 27 | 12 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 22 | 17 |
| Hydroxyurea | 17 | — |
| Apixabanbrand: Eliquis | 13 | — |
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.
$2,787 across 127 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
Additional practice locations (4)
- 9515 Holy Cross Ln Ste 6Breese, IL 62230-3618Phone: (618) 416-7970Fax: (618) 416-7971
- 2100 Madison AveGranite City, IL 62040-4713Phone: (252) 744-6478
- 12860 Troxler Ave Ste 135Highland, IL 62249-2898Phone: (618) 416-7970Fax: (618) 416-7971
- Broadway Plaza Ste 1Sparta, IL 62286-1800Phone: (618) 416-7970Fax: (618) 416-7971
Registry dates
- Enumerated
- 2022-03-15
- Last updated
- 2023-10-17
- Certified
- 2023-10-16
Frequently asked questions
- What is Rachael Demattei's NPI number?
- Rachael Demattei's National Provider Identifier (NPI) is 1891443289, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rachael Demattei's specialty?
- Rachael Demattei is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Rachael Demattei located?
- Rachael Demattei's practice location on file with NPPES is 321 Regency Park Ste 100, O Fallon, IL 62269-1887.
- What is Rachael Demattei's phone number?
- The practice phone number listed in the NPPES registry for Rachael Demattei is (618) 416-7970.
- Does Rachael Demattei accept Medicare?
- Rachael Demattei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rachael Demattei's NPI active?
- Yes — Rachael Demattei's NPI (1891443289) is active in the NPPES registry as of the last update on 2023-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.