MARY KERNER CNM
NPI 1225454879
Advanced Practice Midwife in Baltimore, MD
About Mary Kerner Cnm NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY KERNER CNM (NPI 1225454879) is an individual advanced practice midwife in Baltimore, Maryland, licensed in Maryland (R182606) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS and maintains a secondary practice location in York.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mary Kerner Cnm is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Mary Kerner reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21287
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21287
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1124629837 (Maryland)
- 691 clinicians in this Medicare group
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Baltimore Medical System, Inc.
- 243 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21202 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.
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 Mary Kerner's NPI number?
The NPI number for Mary Kerner is 1225454879. It was assigned to this individual provider in the NPPES registry on March 6, 2014.
Where is Mary Kerner located?
Mary Kerner practices at 1000 E Eager St, Baltimore, MD 21202. The listed phone number is (410) 522-9800.
What is Mary Kerner's specialty?
The primary specialty registered for this NPI is Advanced Practice Midwife with taxonomy code 367A00000X.
Is Mary Kerner enrolled in Medicare?
Yes. Mary Kerner is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Kerner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Kerner reassigns Medicare benefits to 3 organizations: Johns Hopkins University (Baltimore, MD), Johns Hopkins Community Physicians, Inc (Baltimore, MD) and Baltimore Medical Systems, Inc. (Baltimore, MD). 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 Mary Kerner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Kerner was last updated on June 28, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mary Kerner, CNM · NPI 1225454879
Advanced Practice Midwife physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 6, 2014.
## Identity
- **NPI:** 1225454879 (Entity type: Individual)
- **Enumerated:** March 6, 2014
- **Primary specialty:** Advanced Practice Midwife · taxonomy 367A00000X
- **State license:** R182606 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 E EAGER ST, Baltimore, MD 21202-5533
- **Phone:** (410) 522-9800
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1295731966, Baltimore, MD); Johns Hopkins Community Physicians, Inc (NPI 1255359972, Baltimore, MD); Baltimore Medical Systems, Inc. (NPI 1164138152, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1225454879) · Data from the CMS NPPES public registry.