Leonard Paul Blass, M.D.
Infectious Disease Physician · Warren, OH
Leonard Paul Blass, M.D. is an infectious disease physician with a practice address in Warren, Ohio, and NPI 1780678599, issued on Sep 7, 2005. Check the license (Ohio 35-04-5525-B, as entered in NPPES) on the State Medical Board of Ohio; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Leonard Paul Blass
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 35-04-5525-B OH
Self-reported in NPPES; status is on the state search - Practice location
- 1350 E Market St, Warren, OH 44483
- Phone
- (330) 841-9699
- Enumerated
- Sep 7, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (330) 841-9569
- Medicaid ID
- 0647705 OH
- Entity
- Type 1 · individual
Also registered at 1350 E Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julia Abraham, CRNACertified Registered Nurse Anesthetist1972524254
- Mohammed Ahmed, MDPsychiatry Physician1679676274
- Simon Baez Paulino, MDStudent in an Organized Health Care Education/Training Program1164281747
- Richard Bell, CRNACertified Registered Nurse Anesthetist1881644698
- Gregory Bresnahan, CNPFamily Nurse Practitioner1457878266
- Megan Brooker, MDStudent in an Organized Health Care Education/Training Program1124762133
Verify Leonard Paul Blass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35-04-5525-BCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Infectious Disease Physician providers in Ohio
There are 350 infectious disease physician records in Ohio. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other infectious disease physician records in Ohio
- Rita Abbud, MDLorain, OH1740256734
- Khalid Dousa Abdulrahman, MD, CABIMCleveland, OH1780068031
- Alissa Ackelson, MDLancaster, OH1881814796
- Kiran Afshan, M.D.Canton, OH1639459779
- Demetrio Agcaoili, M.D.Saint Clarisville, OH1124040951
- Sydney Agnello, D.OColumbus, OH1477945921
- Leama Ajaka, MDColumbus, OH1548792104
- Badie Al Nemr, M.D.Canton, OH1497968903
- Ali Al Safi, MDColumbus, OH1073140323
- Roger Anderson, MDMarietta, OH1689676264
Common questions
What is Leonard Paul Blass, M.D.'s NPI number?
Leonard Paul Blass, M.D.'s National Provider Identifier (NPI) is 1780678599, issued on Sep 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Paul Blass, M.D. located?
The NPPES record lists a practice address at 1350 E Market St, Warren, OH, 44483. Phone: (330) 841-9699. Providers update this record themselves, so call before visiting.
How can I verify Leonard Paul Blass, M.D.'s license?
NPPES lists Ohio license number 35-04-5525-B, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.