MARGRET LYNETTE CALLAHAN
NPI 1144195892
Nurse Practitioner - Acute Care in Greenville, SC

Q: What is Margret Callahan's NPI number?

The NPI number for Margret Callahan is 1144195892. It was assigned to this individual provider in the NPPES registry on October 10, 2025.

Q: What is Margret Callahan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.

Q: When was this NPI record last updated?

The NPPES record for Margret Callahan was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since October 10, 2025PECOS Enrolled

890 W FARIS RD STE 580, GREENVILLE, SC 29605(864) 455-7874(864) 455-8933 Get Directions Write a Review

NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 14, 2026, Oct 10, 2025 (2 updates tracked since 2025).

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About Margret Lynette Callahan NPPES

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

MARGRET LYNETTE CALLAHAN (NPI 1144195892) is an individual acute care provider in Greenville, South Carolina, licensed in South Carolina (30891) and active in the NPI registry since October 2025. She is enrolled in Medicare PECOS, maintains a secondary practice location in Greenville, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1144195892

Entity TypeIndividualFemale

Primary Taxonomy363LA2100X

Provider Legal NameMARGRET LYNETTE CALLAHAN

Location Address890 W FARIS RD STE 580Greenville, SC 29605-4281

Mailing Address300 E Mcbee Ave Ste 300Greenville, SC 29601-2899 · (864) 522-8603

Phone(864) 455-7874

Fax(864) 455-8933

Sole ProprietorNo

Medical School CMSOtherGraduated 2025

Enumeration DateOctober 10, 2025

Last NPPES UpdateJanuary 14, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 14, 2026

✔ NPI 1144195892 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Acute CarePhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LA2100X

License✔ Licensed in SC · 30891

890 W FARIS RD STE 580, Greenville, SC 29605

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Secondary Practice Location 1

Location 1701 Grove RdGreenville, SC 29605-4210 · Phone (864) 455-7000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margret Lynette Callahan is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID547746919

PECOS Enrollment IDI20260115002391

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29605 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$83.18 typical visit price

range $53.57 – $163.84

Typical copayment $20.79 (range $13.39 – $40.96)

Most-billed visit code 99203

Established Patient

$95.12 typical visit price

range $16.96 – $133.52

Typical copayment $23.78 (range $4.24 – $33.38)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. ROBERT VINCENT MADLINGER D.O.

Surgery (Surgical Critical Care)