John Grisnik, M.D.
NPI 1356301097 · Family Medicine Physician · Jacksonville, FL
John Grisnik, M.D. is a Family Medicine Physician provider in Jacksonville, FL (NPI 1356301097).
Provider details
- NPI number
- 1356301097
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME43199 (FL)
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
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
- 2006-03-25
- Last updated
- 2008-04-02
Frequently asked questions
- What is John Grisnik's NPI number?
- John Grisnik's National Provider Identifier (NPI) is 1356301097, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grisnik's specialty?
- John Grisnik is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Grisnik located?
- John Grisnik's practice location on file with NPPES is 1255 Lila St, Jacksonville, FL 32208-3550.
- What is John Grisnik's phone number?
- The practice phone number listed in the NPPES registry for John Grisnik is (904) 244-5700.
- Is John Grisnik's NPI active?
- Yes — John Grisnik's NPI (1356301097) is active in the NPPES registry as of the last update on 2008-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.