John Elfervig, M.D.
NPI 1619910544 · Retina Specialist (Ophthalmology) Physician · Memphis, TN
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Elfervig, M.D. is a Retina Specialist (Ophthalmology) Physician provider in Memphis, TN (NPI 1619910544).
Provider details
- NPI number
- 1619910544
- Entity type
- Individual
- Primary specialty
- Retina Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD009929 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-06-14
- Last updated
- 2018-01-15
Frequently asked questions
- What is John Elfervig's NPI number?
- John Elfervig's National Provider Identifier (NPI) is 1619910544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Elfervig's specialty?
- John Elfervig is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
- Where is John Elfervig located?
- John Elfervig's practice location on file with NPPES is 825 Ridge Lake Blvd, Memphis, TN 38120-9411.
- What is John Elfervig's phone number?
- The practice phone number listed in the NPPES registry for John Elfervig is (901) 685-2200.
- Does John Elfervig accept Medicare?
- John Elfervig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Elfervig's NPI active?
- Yes — John Elfervig's NPI (1619910544) is active in the NPPES registry as of the last update on 2018-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.