MADISON O'BRIEN MD
NPI 1124762505
Obstetrics & Gynecology in Little Rock, AR

Q: What is Madison O'brien's NPI number?

The NPI number for Madison O'brien is 1124762505. It was assigned to this individual provider in the NPPES registry on April 22, 2022. The provider is also known as Madison Caldwell.

Q: What is Madison O'brien's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Madison O'brien was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 April 22, 2022PECOS Enrolled

4301 W MARKHAM ST # 518, LITTLE ROCK, AR 72205(501) 526-7569 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 13, 2026, Apr 22, 2022 (2 updates tracked since 2022).

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About Madison O'brien Md NPPES

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

MADISON O'BRIEN MD (NPI 1124762505) is an individual obstetrics & gynecology provider in Little Rock, Arkansas, licensed in Utah (14281722-1205) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS and maintains a secondary practice location in Salt Lake City.

NPPES Registry Identity

NPI1124762505

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameMADISON O'BRIENCredential: MD

Location Address4301 W MARKHAM ST # 518Little Rock, AR 72205-7101

Mailing AddressPo Box 27128Salt Lake City, UT 84127-0128

Phone(501) 526-7569

Sole ProprietorNo

Enumeration DateApril 22, 2022

Last NPPES UpdateMay 13, 20262 updates tracked since enumeration

NPPES CertifiedMay 13, 2026

✔ NPI 1124762505 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in UT · 14281722-1205

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

4301 W MARKHAM ST # 518, Little Rock, AR 72205

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Other Names 1

Former Name (1)Madison Caldwell

Secondary Practice Location 1

Location 18th Ave C StSalt Lake City, UT 84143-0001 · Phone (801) 408-3460

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Madison O'brien Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Madison O'brien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ihc Health Services Inc

734 mi

Clinic/Center

1300 N 500 E #130, LOGAN REGIONAL ORTHOPEDICS
Logan, UT 84341

Reassigned Medicare billing, Utah enrollment
3,691 clinicians in this Medicare group

NPI 1205963105 (435) 716-2800

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 72205 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

$119.36 typical visit price

range $51.36 – $157.74

Typical copayment $29.84 (range $12.84 – $39.43)

Most-billed visit code 99204

Established Patient

$64.56 typical visit price

range $16.16 – $128.77

Typical copayment $16.14 (range $4.04 – $32.19)

Most-billed visit code 99213

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 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHALYN BREH CALAWAY CNM

Advanced Practice Midwife