MARISSA EREKSON CRNA
NPI 1821534447
Nurse Anesthetist, Certified Registered in Baltimore, MD
About Marissa Erekson Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISSA EREKSON CRNA (NPI 1821534447) is an individual nurse anesthetist, certified registered in Baltimore, Maryland, licensed in Maryland (R196042) and active in the NPI registry since January 2017. She is affiliated with Medstar Harbor Hospital and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
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
Marissa Erekson Crna 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 Reassignments
10Medicare enrollment records show Marissa Erekson reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- 148 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Shock Trauma Associates PA
- 541 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: University Of Maryland Anesthesiology Associates PA
- 303 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- 966 clinicians in this Medicare group
Baltimore, MD 21218
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 482 clinicians in this Medicare group
Baltimore, MD 21239
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 3,530 clinicians in this Medicare group
Randallstown, MD 21133
- Reassigned Medicare billing, Maryland enrollment
- 135 clinicians in this Medicare group
Columbia, MD 21045
- Reassigned Medicare billing, Maryland enrollment
- 93 clinicians in this Medicare group
Columbia, MD 21046
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 717 clinicians in this Medicare group
Annapolis, MD 21401
- Reassigned Medicare billing, Maryland enrollment
- 44 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 3
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Medstar Harbor Hospital
Acute Care Hospitals · Baltimore, MDUniversity Of MD Baltimore Washington Medical Center
Acute Care Hospitals · Glen Burnie, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BALTIMORE, MD 21201
BALTIMORE, MD 21201
BALTIMORE, MD 21201
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 Marissa Erekson's NPI number?
The NPI number for Marissa Erekson is 1821534447. It was assigned to this individual provider in the NPPES registry on January 7, 2017.
Where is Marissa Erekson located?
Marissa Erekson practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-6120.
What is Marissa Erekson's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Marissa Erekson enrolled in Medicare?
Yes. Marissa Erekson 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 organizations bill Medicare for Marissa Erekson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Erekson reassigns Medicare benefits to 10 organizations: University Of Maryland Medical System Corporation (Baltimore, MD), Shock Trauma Associates, P.A. (Baltimore, MD), University Of Maryland Anesthesiology Associates P.A. (Baltimore, MD), University Of Maryland Community Medical Group, Inc. (Baltimore, MD), Medstar Medical Group Anesthesiology LLC (Baltimore, MD) and 5 more organizations, listed in the Medicare section above. Each 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 Marissa Erekson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marissa Erekson affiliated with any hospitals?
According to CMS data, Marissa Erekson is affiliated with Medstar Harbor Hospital and University Of MD Baltimore Washington Medical Center.
When was this NPI record last updated?
The NPPES record for Marissa Erekson was last updated on January 7, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Marissa Erekson, CRNA · NPI 1821534447
Nurse Anesthetist, Certified Registered physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since January 7, 2017.
## Identity
- **NPI:** 1821534447 (Entity type: Individual)
- **Enumerated:** January 7, 2017
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** R196042 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 S GREENE ST, Baltimore, MD 21201-1544
- **Phone:** (410) 328-6120
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 10 organizations under Medicare reassignment (form CMS-855R): University Of Maryland Medical System Corporation (NPI 1508807355, Baltimore, MD); Shock Trauma Associates, P.A. (NPI 1679512909, Baltimore, MD); University Of Maryland Anesthesiology Associates P.A. (NPI 1033915145, Baltimore, MD); University Of Maryland Community Medical Group, Inc. (NPI 1477530624, Baltimore, MD); Medstar Medical Group Anesthesiology LLC (NPI 1528578333, Baltimore, MD); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** January 7, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1821534447) · Data from the CMS NPPES public registry.