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GUIDESTAR ELDERCARE CORP - KS
NPI 1275484099
Internal Medicine in Columbia, MO

Active since February 06, 2026
303 N STADIUM BLVD FL 2, COLUMBIA, MO 65203(574) 546-1900(574) 546-1999 Get Directions Write a Review

NPPES record last updated: March 31, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 31, 2026, Mar 11, 2026, Feb 6, 2026 (3 updates tracked since 2026).

About Guidestar Eldercare Corp - Ks NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GUIDESTAR ELDERCARE CORP - KS (NPI 1275484099), doing business as Guidestar Eldercare Corp - Mo, is a healthcare organization registered as an internal medicine in Columbia, Missouri and active in the NPI registry since February 2026. The organization maintains 2 additional practice locations and lists Steven L Posar, Exec. Chairman & Chief Med. Officer, as its authorized official.

NPPES Registry Identity

NPI1275484099
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGUIDESTAR ELDERCARE CORP - KS
Location Address303 N STADIUM BLVD FL 2Columbia, MO 65203-1493
Mailing AddressPo Box 11522Fort Wayne, IN 46859-1522 · (574) 546-1900 · Fax (574) 546-1999
Phone(574) 546-1900
Fax(574) 546-1999
Organization SubpartYes
Authorized OfficialSteven L PosarExec. Chairman & Chief Med. Officer · (574) 546-1900
Enumeration DateFebruary 6, 2026
Last NPPES UpdateMarch 31, 20263 updates tracked since enumeration
NPPES CertifiedMarch 31, 2026
✔ NPI 1275484099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 11

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X
Also ListedSocial Worker · ClinicalTaxonomy 1041C0700X
Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X
Also ListedNurse PractitionerTaxonomy 363L00000X
Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X
Also ListedNurse Practitioner · GerontologyTaxonomy 363LG0600X
Also ListedNurse Practitioner · Psychiatric/Mental HealthTaxonomy 363LP0808X
303 N STADIUM BLVD FL 2, Columbia, MO 65203
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Other Names 2

Doing Business AsGuidestar Eldercare Corp - Mo
Other NameGuidestar Eldercare Corp - Ks, Pc Dba Guidestar Eldercare - Mo

Secondary Practice Locations 2

Location 110000 Wornall RdKansas City, MO 64114-4359 · Phone (574) 546-1900 · Fax (574) 546-1999
Location 21500 W Foxwood DrRaymore, MO 64083-9347 · Phone (574) 546-1900 · Fax (574) 546-1999

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Guidestar Eldercare Corp - Ks is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

11

Medicare enrollment records show 11 clinicians reassign Medicare billing to Guidestar Eldercare Corp - Ks, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians by Medicare Specialty 4

Nurse Practitioner5
Clinical Psychologist2
Internal Medicine2
Psychiatry2

Clinicians, nearest first (11)

April Jefferson, PMHNP-BC
Nurse Practitioner
NPI 1275750309
17844 E 23RD ST S
Independence, MO 64057
(816) 254-3652
✔ PECOS✔ Accepts Medicare110 mi
Anita Arthur, APRN
Nurse Practitioner
NPI 1023059573
2100 N MAIN ST STE 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Stephanie Murphy, PSYD, HSPP
Clinical Psychologist
NPI 1518419787
2100 N MAIN ST STE 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Kimberly Sanders, PSYD
Clinical Psychologist
NPI 1497034961
2100 N MAIN ST # 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Olaniyi Osuntokun, MD
Psychiatry
NPI 1548375058
2100 N MAIN ST STE 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Julie Pierce, FNP
Nurse Practitioner
NPI 1366641482
2100 N MAIN ST STE 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Steven Posar, MD
Internal Medicine
NPI 1154308575
2100 N MAIN ST STE 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Ashley Johnson, REGISTERED NURSE
Nurse Practitioner
NPI 1760197495
2100 N MAIN ST # 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
Amy Weller, FNP
Nurse Practitioner
NPI 1710381512
2100 N MAIN ST # 304
Crown Point, IN 46307
(574) 546-1900
✔ PECOS✔ Accepts Medicare315 mi
James Shackson, M.D.
Psychiatry
NPI 1831185545
21 E STATE ST
Columbus, OH 43215
(574) 546-1900
✔ PECOS✔ Accepts Medicare504 mi
Brendan Daley, MD
Internal Medicine
NPI 1144640798
21 E STATE ST
Columbus, OH 43215
(574) 546-1900
✔ PECOS✔ Accepts Medicare504 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Guidestar Eldercare Corp - Ks's NPI number?

The NPI number for Guidestar Eldercare Corp - Ks is 1275484099. It was assigned to this organization in the NPPES registry on February 6, 2026. The provider is doing business as GuideStar Eldercare Corp - MO. The provider is also known as GuideStar Eldercare Corp - KS, PC dba Guidestar Eldercare - MO.

Where is Guidestar Eldercare Corp - Ks located?

Guidestar Eldercare Corp - Ks is located at 303 N Stadium Blvd Fl 2, Columbia, MO 65203. The listed phone number is (574) 546-1900.

What is Guidestar Eldercare Corp - Ks's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Guidestar Eldercare Corp - Ks enrolled in Medicare?

Yes. Guidestar Eldercare Corp - Ks is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Guidestar Eldercare Corp - Ks?

According to the CMS Revalidation Reassignment List (October 2026 release), 11 clinicians in 4 Medicare specialties reassign their Medicare billing to Guidestar Eldercare Corp - Ks. A 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 the clinician's services. The largest specialties are Nurse Practitioner (5), Clinical Psychologist (2) and Internal Medicine (2). Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Guidestar Eldercare Corp - Ks was last updated on March 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.