Frederick Ruymann, MD
NPI 1427045160 · Pediatric Hematology & Oncology Physician · Columbus, OH
Frederick Ruymann, MD is a Pediatric Hematology & Oncology Physician provider in Columbus, OH (NPI 1427045160).
Provider details
- NPI number
- 1427045160
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35048172 (OH)
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
- 2005-09-27
- Last updated
- 2008-11-26
Frequently asked questions
- What is Frederick Ruymann's NPI number?
- Frederick Ruymann's National Provider Identifier (NPI) is 1427045160, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Ruymann's specialty?
- Frederick Ruymann is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Ruymann located?
- Frederick Ruymann's practice location on file with NPPES is 555 S 18th St, Columbus, OH 43205-2654.
- What is Frederick Ruymann's phone number?
- The practice phone number listed in the NPPES registry for Frederick Ruymann is (614) 722-3552.
- Is Frederick Ruymann's NPI active?
- Yes — Frederick Ruymann's NPI (1427045160) is active in the NPPES registry as of the last update on 2008-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.