Southern Illinois Associates LLC
NPI 1962427856 · Psychiatry Physician · Maryville, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Southern Illinois Associates LLC is a Psychiatry Physician organization in Maryville, IL (NPI 1962427856).
Provider details
- NPI number
- 1962427856
- Entity type
- Organization
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Sanjay Nigam, President(618) 288-5019
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Family Nurse Practitioner363LF0000X
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
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
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
- 2006-07-13
- Last updated
- 2026-04-06
- Certified
- 2026-04-06
Frequently asked questions
- What is Southern Illinois Associates LLC's NPI number?
- Southern Illinois Associates LLC's National Provider Identifier (NPI) is 1962427856, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Southern Illinois Associates LLC?
- Southern Illinois Associates LLC is classified in the NPPES registry as Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Southern Illinois Associates LLC located?
- Southern Illinois Associates LLC's practice location on file with NPPES is 6805 State Route 162 Ste 201, Maryville, IL 62062-8530.
- What is Southern Illinois Associates LLC's phone number?
- The practice phone number listed in the NPPES registry for Southern Illinois Associates LLC is (618) 288-5019.
- Does Southern Illinois Associates LLC accept Medicare?
- Southern Illinois Associates LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Southern Illinois Associates LLC?
- The authorized official listed on Southern Illinois Associates LLC's NPPES record is Sanjay Nigam, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Southern Illinois Associates LLC's NPI active?
- Yes — Southern Illinois Associates LLC's NPI (1962427856) is active in the NPPES registry as of the last update on 2026-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.