Onica Leigh Washington, MD, PHD
Nephrology Physician · Worcester, MA
Onica Leigh Washington, MD, PHD is a nephrology physician with a practice address in Worcester, Massachusetts, and NPI 1508362427, issued on Mar 30, 2018. Check the license (Massachusetts 1014793, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Onica Leigh Washington
- Credential
- MD, PHD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 1014793 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-3155
- Enumerated
- Mar 30, 2018
- Record last updated
- Jun 22, 2026
- Medicaid ID
- 110138136A MA
- Medicare enrollment
- Enrolled (PECOS I20240718001181); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nawal Aamir, MDInternal Medicine Physician1588248926
- Amarys Abadie, CRNACertified Registered Nurse Anesthetist1992936843
- Paula Abate, NPNurse Practitioner1336265909
- Aly AbayazeedDiagnostic Radiology Physician1821221946
- Zainab AbbasDermatology Physician1609028000
- Mary-Alice Abbott, MDClinical Genetics (M.D.) Physician1982799417
Verify Onica Leigh Washington in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1014793Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average nephrology physician in 2024
146 Medicare Part D claims for 57 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril12 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
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Massachusetts
There are 417 nephrology physician records in Massachusetts.
Other nephrology physician records in Massachusetts
- Amtul Aala, MDBoston, MA1174946347
- Reza Abdi, MDBoston, MA1356359368
- Marat Abdullin, M.D.Springfield, MA1619159712
- Vivian AbernethyBoston, MA1710960232
- Rekha Abichandani, M.D.Cambridge, MA1912033598
- Konstantin Abramov, M.D.Worcester, MA1992854707
- Krishna Agarwal, M.B.B.S.Springfield, MA1477916120
- Nikhil AgrawalBoston, MA1467722579
- Ayman Al Jurdi, M.D.Boston, MA1043690332
- Laith Al Rabadi, M.D.Boston, MA1821309188
Common questions
What is Onica Leigh Washington, MD, PHD's NPI number?
Onica Leigh Washington, MD, PHD's National Provider Identifier (NPI) is 1508362427, issued on Mar 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Onica Leigh Washington, MD, PHD located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-3155. Providers update this record themselves, so call before visiting.
How can I verify Onica Leigh Washington, MD, PHD's license?
NPPES lists Massachusetts license number 1014793, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Onica Leigh Washington, MD, PHD prescribe under Medicare Part D?
In 2024, Onica Leigh Washington, MD, PHD had 146 Medicare Part D claims for 57 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.