Karen Ann O'Connor, C.R.N.P.
Nurse Practitioner · Rockville, MD
Karen Ann O'Connor, C.R.N.P. is a nurse practitioner with a practice address in Rockville, Maryland, and NPI 1861449191, issued on May 30, 2006. Check the license (Maryland R108183, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Ann O'Connor
- Credential
- C.R.N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- R108183 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1300 Piccard Dr Ste 202, Rockville, MD 20850
- Phone
- (240) 686-2300
- Enumerated
- May 30, 2006
- Record last updated
- Mar 29, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 404181000 MD
- Medicare enrollment
- Enrolled (PECOS I20040510001649); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Karen Ann O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R108183Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Usacs Critical Care Medicine Services East, LLCPrince Frederick, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
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Common questions
What is Karen Ann O'Connor, C.R.N.P.'s NPI number?
Karen Ann O'Connor, C.R.N.P.'s National Provider Identifier (NPI) is 1861449191, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Ann O'Connor, C.R.N.P. located?
The NPPES record lists a practice address at 1300 Piccard Dr Ste 202, Rockville, MD, 20850. Phone: (240) 686-2300. Providers update this record themselves, so call before visiting.
How can I verify Karen Ann O'Connor, C.R.N.P.'s license?
NPPES lists Maryland license number R108183, as entered by the provider. Search the Maryland 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.
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.