Margaret Ngumi, FNP-C PMHNP-BC
NPI 1558701458 · Psychiatric/Mental Health Nurse Practitioner · Olympia, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Ngumi, FNP-C PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Olympia, WA (NPI 1558701458).
Provider details
- NPI number
- 1558701458
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C PMHNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- RN203586 (GA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
62 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 62 | $63 |
Typical Medicare-allowed amounts for these services range $63–$63 (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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 44 | 14 |
| Amlodipine Besylate | 42 | 15 |
| Losartan Potassium | 21 | — |
| Olanzapine | 20 | — |
| Pantoprazole Sodium | 18 | — |
| Metformin Hcl | 16 | — |
| Risperidone | 14 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$63 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-25
- Last updated
- 2025-08-01
- Certified
- 2025-08-01
Frequently asked questions
- What is Margaret Ngumi's NPI number?
- Margaret Ngumi's National Provider Identifier (NPI) is 1558701458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Ngumi's specialty?
- Margaret Ngumi is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Ngumi located?
- Margaret Ngumi's practice location on file with NPPES is 400 Union Ave Se Ste 200, Olympia, WA 98501-2060.
- What is Margaret Ngumi's phone number?
- The practice phone number listed in the NPPES registry for Margaret Ngumi is (833) 351-8255.
- Does Margaret Ngumi accept Medicare?
- Margaret Ngumi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Ngumi's NPI active?
- Yes — Margaret Ngumi's NPI (1558701458) is active in the NPPES registry as of the last update on 2025-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.