IndividualActive
Leonard Blass, M.D.
NPI 1780678599 · Infectious Disease Physician · Warren, OH
Leonard Blass, M.D. is a Infectious Disease Physician provider in Warren, OH (NPI 1780678599).
Provider details
- NPI number
- 1780678599
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 35-04-5525-B (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1350 E Market St
Warren, OH 44483-6608
Phone: (330) 841-9699
Fax: (330) 841-9569
Street-level locationGet directions
Mailing address
340 N Linden Ct
Warren, OH 44484-6038
Registry dates
- Enumerated
- 2005-09-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Leonard Blass's NPI number?
- Leonard Blass's National Provider Identifier (NPI) is 1780678599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Blass's specialty?
- Leonard Blass is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Blass located?
- Leonard Blass's practice location on file with NPPES is 1350 E Market St, Warren, OH 44483-6608.
- What is Leonard Blass's phone number?
- The practice phone number listed in the NPPES registry for Leonard Blass is (330) 841-9699.
- Is Leonard Blass's NPI active?
- Yes — Leonard Blass's NPI (1780678599) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.