Diana Pieterson
NPI 1558930073 · Psychiatric/Mental Health Nurse Practitioner · Randallstown, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Pieterson is a Psychiatric/Mental Health Nurse Practitioner provider in Randallstown, MD (NPI 1558930073).
Provider details
- NPI number
- 1558930073
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- R187593 (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
94 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 | 94 | $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 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 86 | — |
| Sertraline Hcl | 69 | 12 |
| Hydroxyzine Hcl | 57 | 14 |
| Olanzapine | 56 | — |
| Mirtazapine | 55 | — |
| Clozapine | 48 | — |
| Risperidone | 47 | — |
| Trazodone Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-06-19
- Last updated
- 2021-09-22
- Certified
- 2021-09-22
Frequently asked questions
- What is Diana Pieterson's NPI number?
- Diana Pieterson's National Provider Identifier (NPI) is 1558930073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Pieterson's specialty?
- Diana Pieterson is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diana Pieterson located?
- Diana Pieterson's practice location on file with NPPES is 5310 Old Court Rd, Randallstown, MD 21133-5243.
- What is Diana Pieterson's phone number?
- The practice phone number listed in the NPPES registry for Diana Pieterson is (443) 960-8216.
- Does Diana Pieterson accept Medicare?
- Diana Pieterson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Pieterson's NPI active?
- Yes — Diana Pieterson's NPI (1558930073) is active in the NPPES registry as of the last update on 2021-09-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.