Allyse Marie Ortega, FNP-C, AGACNP, RN
Family Nurse Practitioner · O Fallon, MO
At a glance
844 Waterbury Falls Dr Ste B, O Fallon, MO 63368-2208
NPPES record updated Jan 27, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
844 Waterbury Falls Dr Ste BO Fallon, MO 63368-2208
Additional reported practice locations
9556 Manchester RdSaint Louis, MO 631191313
Phone: 3143735740 17 Clarkson Rd
Ellisville, MO 630112215
Phone: 6365529079 27 The Boulevard Saint Louis
Richmond Heights, MO 631171118
Phone: 6363855556
Fax: 6366142093
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2021
- CMS specialties
- Nurse Practitioner
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $1,012.89 |
| Consulting fee | $60.00 |
Reporting companies
| Company | Amount |
|---|---|
| BIOGEN, INC. | $185.00 |
| ASTRAZENECA PHARMACEUTICALS LP | $139.79 |
| TG THERAPEUTICS, INC. | $132.43 |
| AMGEN INC. | $109.85 |
| JANSSEN BIOTECH, INC. | $109.85 |
| ARGENX US, INC. | $101.12 |
| TAKEDA PHARMACEUTICALS U.S.A., INC. | $100.18 |
| EISAI INC. | $79.00 |
| Other reporting companies | $115.67 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Family Nurse Practitioner
- Taxonomy code
- 363LF0000X
- Enumeration date
- Dec 30, 2016
- Record updated
- Jan 27, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- FNP-C, AGACNP, RN
Reported taxonomies and licenses
363LF0000X · Primary
License reported: 2017001487 MO
163WE0003X
License reported: 2010020396 MO
363LA2100X
License reported: 2023000801 MO
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
844 Waterbury Falls Dr Ste BO Fallon, MO 63368-2208
- Phone
- (636) 385-5556
- Fax
- (636) 614-2093
Mailing address
844 WATERBURY FALLS DR STE BO FALLON, MO 633682208
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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