KATHERINE MAAS
NPI 1831701317
Nurse Practitioner - Psychiatric/Mental Health in Arnold, MD
About Katherine Maas NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE MAAS (NPI 1831701317) is an individual psychiatric/mental health provider in Arnold, Maryland, licensed in Maryland (R237827) and active in the NPI registry since August 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).
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
Katherine Maas 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 Katherine Maas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Arnold, MD 21012
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Arundel Mental Health Professionals Lc
- 124 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21012 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ARNOLD, MD 21012
ARNOLD, MD 21012
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 Katherine Maas's NPI number?
The NPI number for Katherine Maas is 1831701317. It was assigned to this individual provider in the NPPES registry on August 17, 2020.
Where is Katherine Maas located?
Katherine Maas practices at 1511 Ritchie Hwy Ste 202, Arnold, MD 21012. The listed phone number is (410) 757-2077.
What is Katherine Maas's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Katherine Maas enrolled in Medicare?
Yes. Katherine Maas 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 Katherine Maas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Maas reassigns Medicare benefits to Arundel Mental Health Professionals L.C. (Arnold, 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 Katherine Maas'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 Katherine Maas was last updated on August 17, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Katherine Maas · NPI 1831701317
Psychiatric/Mental Health physician in Arnold, Maryland. Individual provider, active in the CMS NPPES registry since August 17, 2020.
## Identity
- **NPI:** 1831701317 (Entity type: Individual)
- **Enumerated:** August 17, 2020
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** R237827 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1511 RITCHIE HWY STE 202, Arnold, MD 21012-2410
- **Phone:** (410) 757-2077
## 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:** Arundel Mental Health Professionals L.C. (NPI 1073649521, Arnold, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** August 17, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1831701317) · Data from the CMS NPPES public registry.