John Callahan, R.PH.
NPI 1497097885 · Pharmacist · Saint Louis, MO
John Callahan, R.PH. is a Pharmacist provider in Saint Louis, MO (NPI 1497097885).
Provider details
- NPI number
- 1497097885
- Entity type
- Individual
- Primary specialty
- PharmacistPharmacy Service Providers
- Credential
- R.PH.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 051303891 (IL)
Specialties & taxonomies
Pharmacy Service Providers
Pharmacy Service Providers
Pharmacy Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 915 N Grand BlvdSaint Louis, MO 63106-1621Phone: (314) 224-2793Fax: (314) 845-5091
Registry dates
- Enumerated
- 2013-03-23
- Last updated
- 2026-05-01
- Certified
- 2026-05-01
Frequently asked questions
- What is John Callahan's NPI number?
- John Callahan's National Provider Identifier (NPI) is 1497097885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Callahan's specialty?
- John Callahan is listed in the NPPES registry with a primary specialty of Pharmacist (Pharmacy Service Providers).
- Where is John Callahan located?
- John Callahan's practice location on file with NPPES is 1 Jefferson Barracks Dr, Saint Louis, MO 63125-4181.
- What is John Callahan's phone number?
- The practice phone number listed in the NPPES registry for John Callahan is (314) 894-6570.
- Is John Callahan's NPI active?
- Yes — John Callahan's NPI (1497097885) is active in the NPPES registry as of the last update on 2026-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.