Spencer John Mares
FNP-C, AGACNP-BC | Nurse Practitioner - Family
100 Medical Plz, Lake Saint Louis
Missouri, 63367-1366
636-625-5200
Spencer John Mares is a Lake Saint Louis, Missouri based nurse practitioner who is specialized as Family nurse. Active license number of Spencer John Mares is 2023006109 for Acute Care in Missouri. His current practice location is 100 Medical Plz, Lake Saint Louis. Patients can reach him at 636-625-5200. Spencer John Mares is FNP-C, AGACNP-BC with specialization in Family and his NPI number (Unique professional ID assigned by NPPES) is 1437667490.
Spencer John Mares delivers family-focused care which means he provides care for patients ranging from infants to the elderly and every age in between. Family Nurse Practitioner (FNP) are frequently the primary care provider for families, which means that they will not only diagnose conditions, but also treat them. FNPs perform physical exams, order diagnostic tests and procedures, diagnose and treat illness, prescribe needed medications, and teach their patients how to develop healthy lifestyles to promote health and prevent disease.
Complete Profile:
Spencer John Mares speciality, credentials, practice address, contact phone number and fax are as below.
Patients can call on the below given phone number for appointment.
| Name: | Spencer John Mares |
| Specialization: | Family Nurse Practitioner (FNP) |
| Gender: | Male |
| Credentials: | FNP-C, AGACNP-BC |
| Practice Address: | 100 Medical Plz, Lake Saint Louis,
Missouri, 63367-1366 |
| Phone: | 636-625-5200 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| NPI Number: | 1437667490 |
| NPI Enumeration Date: | 11 Jan, 2018 |
| NPI Last Update On: | 10 Mar, 2023 |
Medical Licenses:
NPs can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Spencer John Mares are as mentioned below.
| License Number | Specialization | State | Status | |
| 2023006109 | Acute Care | Missouri | Primary | |
| 2018001739 | Family | Missouri | Secondary | |
| 277.000663 | Family | Illinois | Secondary | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | Spencer John Mares
50 Meadow Run Ct,
Saint Peters, Missouri |
| Zip: | 63303-5805 |
| Phone Number: | 636-485-3683 |
Patients can reach Spencer John Mares at
100 Medical Plz, Lake Saint Louis, Missouri or can
call to book an appointment on 636-625-5200.
Comments/ Reviews:
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Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.