John Halwig, MD
NPI 1841230760 · Allergy Physician · Austell, GA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Halwig, MD is a Allergy Physician provider in Austell, GA (NPI 1841230760).
Provider details
- NPI number
- 1841230760
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 27558 (GA)
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
2 documented practice locations
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
Additional practice locations (1)
- 4645 Timber Ridge Dr Ste 160Douglasville, GA 30135-7542Phone: (770) 953-3331Fax: (770) 942-7696
Registry dates
- Enumerated
- 2006-06-08
- Last updated
- 2020-11-12
- Certified
- 2020-11-12
Frequently asked questions
- What is John Halwig's NPI number?
- John Halwig's National Provider Identifier (NPI) is 1841230760, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Halwig's specialty?
- John Halwig is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is John Halwig located?
- John Halwig's practice location on file with NPPES is 1620 Mulkey Rd, Austell, GA 30106.
- What is John Halwig's phone number?
- The practice phone number listed in the NPPES registry for John Halwig is (770) 953-3331.
- Does John Halwig accept Medicare?
- John Halwig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Halwig's NPI active?
- Yes — John Halwig's NPI (1841230760) is active in the NPPES registry as of the last update on 2020-11-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.