NPPES file of Aug 9, 2026

Karen L. O'Brien, MSN, RN, ARNP-C

Pediatric Nurse Practitioner · Charleston, SC

Karen L. O'Brien, MSN, RN, ARNP-C is a pediatric nurse practitioner with a practice address in Charleston, South Carolina, and NPI 1518101674, issued on Apr 20, 2009. Check the license (South Carolina 21124, as entered in NPPES) with the South Carolina board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1518101674
Name
Karen L. O'Brien
Credential
MSN, RN, ARNP-C
Primary taxonomy
Pediatric Nurse Practitioner 363LP0200X
License numbers
21124 SC
ARNP 9405374 FL
26NN08407200 NJ
Self-reported in NPPES; status is on the state search
Practice location
171 Ashley Ave, Charleston, SC 29425
Phone
(843) 792-1414
Enumerated
Apr 20, 2009
Record last updated
Jul 21, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatric nurse practitioner records → All 288 in South Carolina → Look up another NPI →

Also registered at 171 Ashley Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Andrea Abbott, MDSurgical Oncology Physician1245473354
  2. Miguel Abboud, MDPediatric Hematology & Oncology Physician1619292851
  3. Ahmed Abdelkader, MD, PHDNephrology Physician1629743000
  4. Mohamed Abdelwahab, MDOtolaryngology Physician1528679768
  5. Anne Abel, MDChild Abuse Pediatrics Physician1043328990
  6. Christina Abrams, M.D.Pediatric Hematology & Oncology Physician1376920207

Verify Karen L. O'Brien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich South Carolina board licenses this profession
    Search for license 21124    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the South Carolina license search

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Industry payments in 2024: $124.99

1 payment: food and beverage; the largest payer was Alcresta Therapeutics, Inc. The 7,169 providers of this specialty with any payment received $330.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karen O'Brien$124.99
  2. Specialty average$330.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Karen L. O'Brien among 288 pediatric nurse practitioner records in South Carolina

Karen L. O'Brien, MSN, RN, ARNP-C is one of 288 pediatric nurse practitioner records with a practice address in South Carolina. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 32% of them.

  • NPI issued2009 · 32% of these records are older, 64% newer
  • In a Medicare fileYes · 52% of these records are
  • In the CMS Doctors and Clinicians fileNo · 9% of these records are
  • Record last updated2022 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0200X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Nurse Practitioner providers in South Carolina

There are 288 pediatric nurse practitioner records in South Carolina.

All 288 in South Carolina → Every provider in Charleston → Pediatric Nurse Practitioner nationwide →

The 8 pediatric nurse practitioner records with the nearest ZIP codes

  1. Cheryl Baxter, CPNP-PCCharleston, SC 294251992786461
  2. Lori Burton, CPNPCharleston, SC 294251831285402
  3. Katherine Chike Harris, DNP, CPNP, NECharleston, SC 294251982834693
  4. Carrie Cormack, PNPCharleston, SC 294251184678831
  5. Emily Hamilton, DNP, APRN, PNPCharleston, SC 294251225441850
  6. Leslie Lane, CPNPCharleston, SC 294251477742658
  7. Kerry Maleska, RN, CPNPCharleston, SC 294251730382359
  8. Jessica Nguyen-Fisher, APRNCharleston, SC 294251689063612

Common questions

What is Karen L. O'Brien, MSN, RN, ARNP-C's NPI number?

Karen L. O'Brien, MSN, RN, ARNP-C's National Provider Identifier (NPI) is 1518101674, issued on Apr 20, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Karen L. O'Brien, MSN, RN, ARNP-C located?

The NPPES record lists a practice address at 171 Ashley Ave, Charleston, SC, 29425. Phone: (843) 792-1414. Providers update this record themselves, so call before visiting.

How can I verify Karen L. O'Brien, MSN, RN, ARNP-C's license?

NPPES lists South Carolina license number 21124, as entered by the provider. Search the South Carolina board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.