Lexi Kremer-Callahan, MD
NPI 1124722061 · Student in an Organized Health Care Education/Training Program · Saint Louis, MO
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lexi Kremer-Callahan, MD is a Student in an Organized Health Care Education/Training Program provider in Saint Louis, MO (NPI 1124722061).
Provider details
- NPI number
- 1124722061
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lisinopril | 27 |
| Albuterol Sulfatebrand: Ventolin Hfa | 26 |
| Amlodipine Besylate | 21 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 18 |
| Aripiprazole | 17 |
| Escitalopram Oxalate | 17 |
| Rosuvastatin Calcium | 14 |
| Allopurinol | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-27
- Last updated
- 2023-10-05
- Certified
- 2023-10-05
Frequently asked questions
- What is Lexi Kremer-Callahan's NPI number?
- Lexi Kremer-Callahan's National Provider Identifier (NPI) is 1124722061, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lexi Kremer-Callahan's specialty?
- Lexi Kremer-Callahan is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Lexi Kremer-Callahan located?
- Lexi Kremer-Callahan's practice location on file with NPPES is 401 Holly Hills Ave, Saint Louis, MO 63111-2410.
- What is Lexi Kremer-Callahan's phone number?
- The practice phone number listed in the NPPES registry for Lexi Kremer-Callahan is (314) 353-5190.
- Does Lexi Kremer-Callahan accept Medicare?
- Lexi Kremer-Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lexi Kremer-Callahan's NPI active?
- Yes — Lexi Kremer-Callahan's NPI (1124722061) is active in the NPPES registry as of the last update on 2023-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.