John Halliwell, PHD, CCC-SLP
NPI 1942569595 · Speech-Language Pathologist · Oak Park, IL
John Halliwell, PHD, CCC-SLP is a Speech-Language Pathologist provider in Oak Park, IL (NPI 1942569595).
Provider details
- NPI number
- 1942569595
- Entity type
- Individual
- Primary specialty
- Speech-Language PathologistSpeech, Language and Hearing Service Providers
- Credential
- PHD, CCC-SLP
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
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
14 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2012-05-15
- Last updated
- 2013-08-05
Frequently asked questions
- What is John Halliwell's NPI number?
- John Halliwell's National Provider Identifier (NPI) is 1942569595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Halliwell's specialty?
- John Halliwell is listed in the NPPES registry with a primary specialty of Speech-Language Pathologist (Speech, Language and Hearing Service Providers).
- Where is John Halliwell located?
- John Halliwell's practice location on file with NPPES is 3 Erie Ct, Oak Park, IL 60302-2519.
- What is John Halliwell's phone number?
- The practice phone number listed in the NPPES registry for John Halliwell is (708) 383-6200.
- Is John Halliwell's NPI active?
- Yes — John Halliwell's NPI (1942569595) is active in the NPPES registry as of the last update on 2013-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.