Margaret Muthoni Ngumi, FNP-C PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner · Olympia, WA
Margaret Muthoni Ngumi, FNP-C PMHNP-BC is a psychiatric/mental health nurse practitioner with a practice address in Olympia, Washington, and NPI 1558701458, issued on Jun 25, 2013. Check the license (Washington AP61321033, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Muthoni Ngumi
- Credential
- FNP-C PMHNP-BC
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- AP61321033 WA
RN203586 GA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Union Ave SE Ste 200, Olympia, WA 98501
- Phone
- (833) 351-8255
- Enumerated
- Jun 25, 2013
- Record last updated
- Aug 1, 2025
- Fax
- (770) 704-2765
- Medicare enrollment
- Enrolled (PECOS I20130715000425); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,875 in Washington → Look up another NPI →
Also registered at 400 Union Ave SE Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Camila Arrate, LPNLicensed Practical Nurse1649986563
- John Bellavia, MD PLLCPsychiatry Physician1023183811
- Severine Dondina, APRNPsychiatric/Mental Health Nurse Practitioner1639707516
- Angelica Luciano, ARNPPsychiatric/Mental Health Nurse Practitioner1841687183
- Cindy Perryman, MFTMarriage & Family Therapist1891990586
- Kacie Plantenberg, MA, LMHCMental Health Counselor1730853185
Verify Margaret Muthoni Ngumi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license AP61321033Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
515 Medicare Part D claims for 105 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Atorvastatin Calcium44 claims
- Amlodipine Besylate42 claims
- Losartan Potassium21 claims
- Olanzapine20 claims
- Pantoprazole Sodium18 claims
- Metformin Hcl16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 92.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $62.71
4 payments; by number, the most common kind was food and beverage; the largest payer was Dynavax Technologies Corporation. The 23,362 providers of this specialty with any payment received $1,027.77 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Floyd Physicians LLCRome, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Muthoni Ngumi among 1,875 psychiatric/mental health nurse practitioner records in Washington
Margaret Muthoni Ngumi, FNP-C PMHNP-BC is one of 1,875 psychiatric/mental health nurse practitioner records with a practice address in Washington. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 26% of them.
- NPI issued2013 · 26% of these records are older, 71% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 48% of these records are
- Graduated2022 · median 2020 among the 904 with a school on file
- Record last updated2025 · 28% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 psychiatric/mental health nurse practitioner records list a practice address in Olympia
They are 52 of the 5,034 NPPES records with a practice address in Olympia, and 1,875 psychiatric/mental health nurse practitioner records in Washington.
All 1,875 in Washington → Every provider in Olympia → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Dana Castro, PMHNP-BCOlympia, WA 985011205550522
- Cally Dingler, CPNPOlympia, WA 985011164729729
- Severine Dondina, APRNOlympia, WA 985011639707516
- Melissa Gallardo, NPOlympia, WA 985011578039749
- Angelica Luciano, ARNPOlympia, WA 985011841687183
- Amanda MartineauTumwater, WA 985011316822380
- Brooke Music, ARNPOlympia, WA 985011649022955
- Doreen Phillips, APRNOlympia, WA 985011942831565
Common questions
What is Margaret Muthoni Ngumi, FNP-C PMHNP-BC's NPI number?
Margaret Muthoni Ngumi, FNP-C PMHNP-BC's National Provider Identifier (NPI) is 1558701458, issued on Jun 25, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Muthoni Ngumi, FNP-C PMHNP-BC located?
The NPPES record lists a practice address at 400 Union Ave SE Ste 200, Olympia, WA, 98501. Phone: (833) 351-8255. Providers update this record themselves, so call before visiting.
How can I verify Margaret Muthoni Ngumi, FNP-C PMHNP-BC's license?
NPPES lists Washington license number AP61321033, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Muthoni Ngumi, FNP-C PMHNP-BC prescribe under Medicare Part D?
In 2024, Margaret Muthoni Ngumi, FNP-C PMHNP-BC had 515 Medicare Part D claims for 105 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
What is Margaret Muthoni Ngumi, FNP-C PMHNP-BC's MIPS final score?
The 2023 MIPS final score is 92.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.