STEVEN L POSAR MD
NPI 1154308575
Internal Medicine in Crown Point, IN
About Steven L Posar Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN L POSAR MD (NPI 1154308575) is an individual internal medicine provider in Crown Point, Indiana, licensed in Indiana (01046045A) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, maintains 10 additional practice locations, and is a graduate of University Of Michigan Medical School (1974).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 10
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Steven L Posar Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Steven Posar reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Crown Point, IN 46307
- Reassigned Medicare billing, Indiana, Kentucky and Michigan enrollments
- 83 clinicians in this Medicare group
Columbus, OH 43215
- Reassigned Medicare billing, Ohio enrollment
- 60 clinicians in this Medicare group
Columbia, MO 65203
- Reassigned Medicare billing, Missouri and Kansas enrollments
- Also billed through NPI 1356203806 (Kansas)
- 11 clinicians in this Medicare group
Memphis, TN 38119
- Reassigned Medicare billing, Tennessee enrollment
- Medicare enrollment name: Guidestar Eldercare - Tn, PC
- 30 clinicians in this Medicare group
Altoona, PA 16602
- Reassigned Medicare billing, Pennsylvania enrollment
- 20 clinicians in this Medicare group
Garland, TX 75040
- Reassigned Medicare billing, Texas enrollment
- 25 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46307 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CROWN POINT, IN 46307
CROWN POINT, IN 46307
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Steven Posar's NPI number?
The NPI number for Steven Posar is 1154308575. It was assigned to this individual provider in the NPPES registry on December 28, 2005.
Where is Steven Posar located?
Steven Posar practices at 2100 N Main St Ste 304, Crown Point, IN 46307. The listed phone number is (574) 546-1900.
What is Steven Posar's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Steven Posar enrolled in Medicare?
Yes. Steven Posar is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Steven Posar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Posar reassigns Medicare benefits to 6 organizations: Neurology And Pain Management Associates PC (Crown Point, IN), Guidestar Eldercare Corp -Oh (Columbus, OH), Guidestar Eldercare Corp - Ks (Columbia, MO), Guidestar Eldercare - Tn, P.C. (Memphis, TN), Guidestar Eldercare - PA (Altoona, PA) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Steven Posar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Posar accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Cross and Blue Shield of Texas and CareSource and 4 other insurers list Steven Posar as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Steven Posar was last updated on September 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 54 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Steven L Posar, MD · NPI 1154308575
Internal Medicine physician in Crown Point, Indiana. Individual provider, active in the CMS NPPES registry since December 28, 2005.
## Identity
- **NPI:** 1154308575 (Entity type: Individual)
- **Enumerated:** December 28, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 01046045A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 2100 N MAIN ST STE 304, Crown Point, IN 46307-1877
- **Phone:** (574) 546-1900 · **Fax:** (574) 546-1999
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Neurology And Pain Management Associates PC (NPI 1518900620, Crown Point, IN); Guidestar Eldercare Corp -Oh (NPI 1962023424, Columbus, OH); Guidestar Eldercare Corp - Ks (NPI 1275484099, Columbia, MO); Guidestar Eldercare - Tn, P.C. (NPI 1023791449, Memphis, TN); Guidestar Eldercare - PA (NPI 1265311021, Altoona, PA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 1974
## Record status
- **NPPES last updated:** September 15, 2026
- **Other identifiers:** Other T2472 (TX); Other 35.138677 (OH); Other 68641 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1154308575) · Data from the CMS NPPES public registry.