NICHOL L O'MARR CRNP
NPI 1598726655
Nurse Practitioner in Catonsville, MD
About Nichol L O'marr Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NICHOL L O'MARR CRNP (NPI 1598726655) is an individual nurse practitioner in Catonsville, Maryland, licensed in Maryland (R144756) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Mercy Medical Center Inc, and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Nichol L O'marr Crnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Nichol O'marr reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baltimore, MD 21227
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 15 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Center Inc
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21228 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
CATONSVILLE, MD 21228
CATONSVILLE, MD 21228
BALTIMORE, MD 21228
CATONSVILLE, MD 21228
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Nichol O'marr's NPI number?
The NPI number for Nichol O'marr is 1598726655. It was assigned to this individual provider in the NPPES registry on March 29, 2006. The provider is also known as Nichol L Milton Crnp.
Where is Nichol O'marr located?
Nichol O'marr practices at 516 N Rolling Rd Suite 304, Catonsville, MD 21228. The listed phone number is (410) 744-0890.
What is Nichol O'marr's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Nichol O'marr enrolled in Medicare?
Yes. Nichol O'marr is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Nichol O'marr's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nichol O'marr reassigns Medicare benefits to Mid-Atlantic Nephrology Associates PA (Baltimore, MD). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nichol O'marr's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Nichol O'marr affiliated with any hospitals?
According to CMS data, Nichol O'marr is affiliated with Mercy Medical Center Inc.
When was this NPI record last updated?
The NPPES record for Nichol O'marr was last updated on October 17, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Nichol L O'marr, CRNP · NPI 1598726655
Nurse Practitioner physician in Catonsville, Maryland. Individual provider, active in the CMS NPPES registry since March 29, 2006.
## Identity
- **NPI:** 1598726655 (Entity type: Individual)
- **Enumerated:** March 29, 2006
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** R144756 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 516 N ROLLING RD, SUITE 304, Catonsville, MD 21228-4140
- **Phone:** (410) 744-0890 · **Fax:** (410) 744-2007
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mid-Atlantic Nephrology Associates PA (NPI 1356390108, Baltimore, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** October 17, 2013
- **Other identifiers:** Medicare UPIN Q71421 (MD); Medicare ID-Type Unspecified O208 (MD); Medicaid 008316000 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1598726655) · Data from the CMS NPPES public registry.