Nik Jefferson Ooi
Psychiatric/Mental Health Nurse Practitioner · Silver Spring, MD
Nik Jefferson Ooi is a psychiatric/mental health nurse practitioner with a practice address in Silver Spring, Maryland, and NPI 1215587365, issued on Sep 19, 2019. Check the license (Maryland R263594, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nik Jefferson Ooi
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- R263594 MD
RN1047416 DC
976325 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3901 Randolph RD, Silver Spring, MD 20902
- Phone
- (434) 409-7543
- Enumerated
- Sep 19, 2019
- Record last updated
- Mar 6, 2024
- Medicare enrollment
- Enrolled (PECOS I20220316000754); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 2,373 in Maryland → Look up another NPI →
Verify Nik Jefferson Ooi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R263594Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
758 Medicare Part D claims for 103 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D.
Most prescribed
- Donepezil Hcl104 claims
- Amlodipine Besylate38 claims
- Atorvastatin Calcium32 claims
- Clonazepam25 claims
- Metformin Hcl22 claims
- Pantoprazole Sodium22 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.
Bills Medicare through one group practice
- Unity Health Care Inc.Washington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nik Jefferson Ooi among 2,373 psychiatric/mental health nurse practitioner records in Maryland
Nik Jefferson Ooi is one of 2,373 psychiatric/mental health nurse practitioner records with a practice address in Maryland. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 33% of them.
- NPI issued2019 · 33% of these records are older, 61% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2019 · median 2021 among the 1,409 with a school on file
- Record last updated2024 · 19% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
70 psychiatric/mental health nurse practitioner records list a practice address in Silver Spring
They are 70 of the 6,531 NPPES records with a practice address in Silver Spring, and 2,373 psychiatric/mental health nurse practitioner records in Maryland.
All 2,373 in Maryland → Every provider in Silver Spring → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Yadale FassilSilver Spring, MD 209021710855440
- Julaine Newell, DNP PMHNPWheaton, MD 209021508648213
- Kathyrn Novak, NPSilver Spring, MD 209021265689715
- Kellie Sewell, PMHNPWheaton, MD 209021750411807
- Kuyik-Abasi UmahWheaton, MD 209021447000625
- Damilola AyoadeSilver Spring, MD 209011326917360
- Sarah Gibson, CRNP-PMHSilver Spring, MD 209011619546785
- Rachel Mackessy-Lloyd, PMHNP-BC, CRNP-BCSilver Spring, MD 209011326303215
Common questions
What is Nik Jefferson Ooi's NPI number?
Nik Jefferson Ooi's National Provider Identifier (NPI) is 1215587365, issued on Sep 19, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Nik Jefferson Ooi located?
The NPPES record lists a practice address at 3901 Randolph RD, Silver Spring, MD, 20902. Phone: (434) 409-7543. Providers update this record themselves, so call before visiting.
How can I verify Nik Jefferson Ooi's license?
NPPES lists Maryland license number R263594, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Nik Jefferson Ooi prescribe under Medicare Part D?
In 2024, Nik Jefferson Ooi had 758 Medicare Part D claims for 103 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
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.