IndividualActive
William Welder, M.D.
NPI 1679593214 · Family Medicine Physician · Great Lakes, IL
William Welder, M.D. is a Family Medicine Physician provider in Great Lakes, IL (NPI 1679593214).
Provider details
- NPI number
- 1679593214
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(84/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
3420 Illinois St
Great Lakes, IL 60088-3120
Phone: (847) 688-6755
Fax: (847) 688-2722
Street-level locationGet directions
Mailing address
1277 Queen Ann Ln
Gurnee, IL 60031-1932
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Welder's NPI number?
- William Welder's National Provider Identifier (NPI) is 1679593214, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Welder's specialty?
- William Welder is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Welder located?
- William Welder's practice location on file with NPPES is 3420 Illinois St, Great Lakes, IL 60088-3120.
- What is William Welder's phone number?
- The practice phone number listed in the NPPES registry for William Welder is (847) 688-6755.
- Is William Welder's NPI active?
- Yes — William Welder's NPI (1679593214) 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.