Katherine Maas
NPI 1831701317 · Psychiatric/Mental Health Nurse Practitioner · Arnold, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Maas is a Psychiatric/Mental Health Nurse Practitioner provider in Arnold, MD (NPI 1831701317).
Provider details
- NPI number
- 1831701317
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- R237827 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
119 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 119 | $113 |
Typical Medicare-allowed amounts for these services range $113–$113 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clonazepam | 15 |
| Escitalopram Oxalate | 14 |
| Aripiprazole | 11 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-08-17
- Last updated
- 2020-08-17
- Certified
- 2020-08-17
Frequently asked questions
- What is Katherine Maas's NPI number?
- Katherine Maas's National Provider Identifier (NPI) is 1831701317, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Maas's specialty?
- Katherine Maas is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katherine Maas located?
- Katherine Maas's practice location on file with NPPES is 1511 Ritchie Hwy Ste 202, Arnold, MD 21012-2410.
- What is Katherine Maas's phone number?
- The practice phone number listed in the NPPES registry for Katherine Maas is (410) 757-2077.
- Does Katherine Maas accept Medicare?
- Katherine Maas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Maas's NPI active?
- Yes — Katherine Maas's NPI (1831701317) is active in the NPPES registry as of the last update on 2020-08-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.