John Erffmeyer, M.D.
NPI 1689609398 · Allergy & Immunology Physician · Baton Rouge, LA
John Erffmeyer, M.D. is a Allergy & Immunology Physician provider in Baton Rouge, LA (NPI 1689609398).
Provider details
- NPI number
- 1689609398
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- L014036 (LA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2007-12-07
Frequently asked questions
- What is John Erffmeyer's NPI number?
- John Erffmeyer's National Provider Identifier (NPI) is 1689609398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Erffmeyer's specialty?
- John Erffmeyer is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is John Erffmeyer located?
- John Erffmeyer's practice location on file with NPPES is 9001 Summa Ave, Baton Rouge, LA 70809-3726.
- What is John Erffmeyer's phone number?
- The practice phone number listed in the NPPES registry for John Erffmeyer is (225) 761-5200.
- Is John Erffmeyer's NPI active?
- Yes — John Erffmeyer's NPI (1689609398) is active in the NPPES registry as of the last update on 2007-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.