Joy I. Onaghise, MD
Internal Medicine Physician · Upper Marlboro, MD
Joy I. Onaghise, MD is an internal medicine physician with a practice address in Upper Marlboro, Maryland, and NPI 1679958565, issued on Jul 21, 2015. Check the license (Maryland D0085309, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Joy I. Onaghise
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0085309 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1221 Mercantile LN, Upper Marlboro, MD 20774
- Phone
- (301) 618-5500
- Enumerated
- Jul 21, 2015
- Record last updated
- Jun 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181002001997); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 1221 Mercantile LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jacqueline Arthur-Baidoo, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1235810276
- David Auh, MDFamily Medicine Physician1356752588
- Olufemi Balogun, MDFamily Medicine Physician1194010678
- Folasade Bangali, DPTPhysical Therapist1811394091
Verify Joy I. Onaghise in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0085309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average internal medicine physician in 2024
4,738 Medicare Part D claims for 461 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium588 claims
- Amlodipine Besylate394 claims
- Losartan Potassium323 claims
- Lisinopril181 claims
- Glipizide179 claims
- Hydrochlorothiazide156 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
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joy I. Onaghise among 3,904 internal medicine physician records in Maryland
Joy I. Onaghise, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 77% of them.
- NPI issued2015 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2009 · median 2003 among the 2,445 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 internal medicine physician records list a practice address in Upper Marlboro
They are 14 of the 1,638 NPPES records with a practice address in Upper Marlboro, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Upper Marlboro → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Cielito Aguinaldo, MDLargo, MD 207741063585347
- Elizabeth Biru, MDLargo, MD 207741457342230
- Doreen Blake, M.D.Largo, MD 207741043209331
- George Bone, MDLargo, MD 207741528028297
- Anita Clayton, MDLargo, MD 207741598838872
- Olumide Coker, M.D.Largo, MD 207741235171885
- Glen Jacob, MDLargo, MD 207741780757062
- Ejaz Khan, MDUpper Marlboro, MD 207741669416160
Common questions
What is Joy I. Onaghise, MD's NPI number?
Joy I. Onaghise, MD's National Provider Identifier (NPI) is 1679958565, issued on Jul 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Joy I. Onaghise, MD located?
The NPPES record lists a practice address at 1221 Mercantile LN, Upper Marlboro, MD, 20774. Phone: (301) 618-5500. Providers update this record themselves, so call before visiting.
How can I verify Joy I. Onaghise, MD's license?
NPPES lists Maryland license number D0085309, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joy I. Onaghise, MD prescribe under Medicare Part D?
In 2024, Joy I. Onaghise, MD had 4,738 Medicare Part D claims for 461 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.