CHARLES P O'BRIEN M.D.
NPI 1124023171
Internal Medicine in Sioux Falls, SD

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

The NPI number for Charles O'brien is 1124023171. It was assigned to this individual provider in the NPPES registry on June 16, 2005.

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

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

Q: When was this NPI record last updated?

The NPPES record for Charles O'brien was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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 June 16, 2005

1305 W 18TH ST, SIOUX FALLS, SD 57105(605) 328-2929(605) 328-8429 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Charles P O'brien M.d. NPPES

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

CHARLES P O'BRIEN M.D. (NPI 1124023171) is an individual internal medicine provider in Sioux Falls, South Dakota, licensed in South Dakota (2515) and active in the NPI registry since June 2005.

NPPES Registry Identity

NPI1124023171

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameCHARLES P O'BRIENCredential: M.D.

Location Address1305 W 18TH STSioux Falls, SD 57105-0401

Mailing AddressPo Box 5074Sioux Falls, SD 57117-5074 · (605) 328-9556 · Fax (605) 328-9501

Phone(605) 328-2929

Fax(605) 328-8429

Sole ProprietorNo

Enumeration DateJune 16, 2005

Last NPPES UpdateJuly 8, 2007

✔ NPI 1124023171 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in SD · 2515

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.

1305 W 18TH ST, Sioux Falls, SD 57105

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Other Identifiers 3

Medicare ID-Type Unspecified6306SD

Medicaid6000883SD

Medicare UPIND25509

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.

JEDD D BIALAS CRNA

Nurse Anesthetist, Certified Registered