John Dull, AAS, BS, NBC, BC-HIS
NPI 1578807897 · Hearing Instrument Specialist · Freeport, IL
John Dull, AAS, BS, NBC, BC-HIS is a Hearing Instrument Specialist provider in Freeport, IL (NPI 1578807897).
Provider details
- NPI number
- 1578807897
- Entity type
- Individual
- Primary specialty
- Hearing Instrument SpecialistSpeech, Language and Hearing Service Providers
- Credential
- AAS, BS, NBC, BC-HIS
- Sex
- Male
- Sole proprietor
- No
- License
- 037-3065 (IL)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 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
- 2012-11-27
- Last updated
- 2015-10-21
Frequently asked questions
- What is John Dull's NPI number?
- John Dull's National Provider Identifier (NPI) is 1578807897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Dull's specialty?
- John Dull is listed in the NPPES registry with a primary specialty of Hearing Instrument Specialist (Speech, Language and Hearing Service Providers).
- Where is John Dull located?
- John Dull's practice location on file with NPPES is 1816 S West Ave, Freeport, IL 61032-6712.
- What is John Dull's phone number?
- The practice phone number listed in the NPPES registry for John Dull is (815) 233-2535.
- Is John Dull's NPI active?
- Yes — John Dull's NPI (1578807897) is active in the NPPES registry as of the last update on 2015-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.