Frances U. Onyimba, M.D.
Gastroenterology Physician · York, PA
Frances U. Onyimba, M.D. is a gastroenterology physician with a practice address in York, Pennsylvania, and NPI 1578839072, issued on Mar 28, 2012. Check the license (Pennsylvania MD477998, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Frances U. Onyimba
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD477998 PA
D87385 MD
Self-reported in NPPES; status is on the state search - Practice location
- 2350 Freedom Way Ste 200, York, PA 17402
- Phone
- (717) 812-5120
- Enumerated
- Mar 28, 2012
- Record last updated
- May 23, 2022
- Fax
- (717) 741-3075
- Medicare enrollment
- Enrolled (PECOS I20220520001200); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,049 in Pennsylvania → Look up another NPI →
Also registered at 2350 Freedom Way Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zaid Alnoah, M.D.Gastroenterology Physician1053570432
- Ikenna Anaka, M.D.Gastroenterology Physician1265791412
- Ahmed Baiomi, MDGastroenterology Physician1922414226
- Kesia Cicero, CRNPFamily Nurse Practitioner1306453543
- Ryan Croteau, M.D.Gastroenterology Physician1073888160
- Anand Dutta, M.D.Gastroenterology Physician1770741746
Verify Frances U. Onyimba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD477998Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average gastroenterology physician in 2024
490 Medicare Part D claims for 141 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Pantoprazole Sodium181 claims
- Omeprazole62 claims
- Rabeprazole Sodium52 claims
- Famotidine48 claims
- Esomeprazole Magnesium41 claims
- Sucralfate14 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
- Wellspan Medical GroupYork, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frances U. Onyimba among 1,049 gastroenterology physician records in Pennsylvania
Frances U. Onyimba, M.D. is one of 1,049 gastroenterology physician records with a practice address in Pennsylvania. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 76% of them.
- NPI issued2012 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2012 · median 2003 among the 769 with a school on file
- Record last updated2022 · 63% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Pennsylvania
There are 1,049 gastroenterology physician records in Pennsylvania.
All 1,049 in Pennsylvania → Every provider in York → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Zaid Alnoah, M.D.York, PA 174021053570432
- Ikenna Anaka, M.D.York, PA 174021265791412
- Ryan Croteau, M.D.York, PA 174021073888160
- Sunita Dachinger, MDYork, PA 174021114916657
- Anand Dutta, M.D.York, PA 174021770741746
- Arleen Ortiz, MDYork, PA 174021437447505
- Rajesh Panchwagh, DOYork, PA 174021376542373
- Alan Rosen, MDYork, PA 174021235102930
Common questions
What is Frances U. Onyimba, M.D.'s NPI number?
Frances U. Onyimba, M.D.'s National Provider Identifier (NPI) is 1578839072, issued on Mar 28, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Frances U. Onyimba, M.D. located?
The NPPES record lists a practice address at 2350 Freedom Way Ste 200, York, PA, 17402. Phone: (717) 812-5120. Providers update this record themselves, so call before visiting.
How can I verify Frances U. Onyimba, M.D.'s license?
NPPES lists Pennsylvania license number MD477998, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Frances U. Onyimba, M.D. prescribe under Medicare Part D?
In 2024, Frances U. Onyimba, M.D. had 490 Medicare Part D claims for 141 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.