Justin Grischkan, MD
NPI 1407346646 · Internal Medicine Physician · Rochester, NY
Justin Grischkan, MD is a Internal Medicine Physician provider in Rochester, NY (NPI 1407346646).
Provider details
- NPI number
- 1407346646
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD474505 (PA)
Specialties & taxonomies
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
8 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
- 2018-05-14
- Last updated
- 2023-07-31
- Certified
- 2023-07-31
Frequently asked questions
- What is Justin Grischkan's NPI number?
- Justin Grischkan's National Provider Identifier (NPI) is 1407346646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Grischkan's specialty?
- Justin Grischkan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Grischkan located?
- Justin Grischkan's practice location on file with NPPES is 601 Elmwood Ave., Rochester, NY 14642-0001.
- What is Justin Grischkan's phone number?
- The practice phone number listed in the NPPES registry for Justin Grischkan is (585) 275-4912.
- Is Justin Grischkan's NPI active?
- Yes — Justin Grischkan's NPI (1407346646) is active in the NPPES registry as of the last update on 2023-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.