Olanma Yvonne Okoji, M.D.
Gastroenterology Physician · Rockville, MD
Olanma Yvonne Okoji, M.D. is a gastroenterology physician with a practice address in Rockville, Maryland, and NPI 1457678492, issued on Apr 30, 2010. Check the license (Maryland D81112, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Olanma Yvonne Okoji
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D81112 MD
Self-reported in NPPES; status is on the state search - Practice location
- 14955 Shady Grove RD, Rockville, MD 20850
- Phone
- (301) 340-3252
- Enumerated
- Apr 30, 2010
- Record last updated
- Aug 16, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (301) 340-1423
- Medicare enrollment
- Enrolled (PECOS I20160912002091); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 505 in Maryland → Look up another NPI →
Also registered at 14955 Shady Grove RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lawrence Bassin, MDGastroenterology Physician1215921473
- Harjit Bhogal, MDGastroenterology Physician1346472503
- Lisa Cohen, DDSOral and Maxillofacial Surgery (Dentist)1679766794
- Robert Eisdorfer, MDGastroenterology Physician1891789046
- Emine Erkmen, DDSDentist1649330473
- Michael Gnatt, MDInternal Medicine Physician1255392866
Verify Olanma Yvonne Okoji in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D81112Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average gastroenterology physician in 2024
846 Medicare Part D claims for 268 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Famotidine197 claims
- Omeprazole112 claims
- Pantoprazole Sodium98 claims
- Clenpiq52 claims
- Sod Sulf-Potass Sulf-Mag Sulf36 claims
- Rabeprazole 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.
Industry payments in 2024: $966.84
45 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Capital Digestive Care LLCRockville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Olanma Yvonne Okoji among 505 gastroenterology physician records in Maryland
Olanma Yvonne Okoji, M.D. is one of 505 gastroenterology physician records with a practice address in Maryland. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 74% of them.
- NPI issued2010 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2010 · median 2002 among the 344 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Maryland
There are 505 gastroenterology physician records in Maryland.
All 505 in Maryland → Every provider in Rockville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Lawrence Bassin, MDRockville, MD 208501215921473
- Mark Birns, M.D.Rockville, MD 208501982692828
- Robert Eisdorfer, MDRockville, MD 208501891789046
- Elizabeth Gantt, MDRockville, MD 208501619973963
- Mark Gloger, M.D.Rockville, MD 208501295723146
- Ghanshyam Gupta, M.DRockville, MD 208501619089000
- Neil Julie, M.D.Rockville, MD 208501578661054
- Julia Korenman, MDRockville, MD 208501780678946
Common questions
What is Olanma Yvonne Okoji, M.D.'s NPI number?
Olanma Yvonne Okoji, M.D.'s National Provider Identifier (NPI) is 1457678492, issued on Apr 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Olanma Yvonne Okoji, M.D. located?
The NPPES record lists a practice address at 14955 Shady Grove RD, Rockville, MD, 20850. Phone: (301) 340-3252. Providers update this record themselves, so call before visiting.
How can I verify Olanma Yvonne Okoji, M.D.'s license?
NPPES lists Maryland license number D81112, 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 Olanma Yvonne Okoji, M.D. prescribe under Medicare Part D?
In 2024, Olanma Yvonne Okoji, M.D. had 846 Medicare Part D claims for 268 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.