Quick answers
- Does Raymond O. Nwadiuko accept Medicare assignment?
- Medicare's clinician data says Raymond O. Nwadiuko may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Raymond O. Nwadiuko see?
- In 2024, CMS data shows 77 Original Medicare patients and 10,144 services for Raymond O. Nwadiuko. This counts Original Medicare only and measures volume, not quality.
- What is Raymond O. Nwadiuko's NPI number?
- 1255387288. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Raymond O. Nwadiuko, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 77 |
|---|---|
| Services billed to Medicare | 10,144 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Test for allergy using allergenic extract (95004)4,560 services
- Professional service for preparation and provision of 1 or more antigens (95165)2,650 services
- Test for allergy using allergenic extract injected into skin (95024)1,693 services
- Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)453 services
- Professional service for multiple injections of allergen (95117)441 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Asthma53%
- Diabetes49%
- Arthritis42%
- Ischemic heart disease29%
Practice locations
Addresses where Raymond O. Nwadiuko is enrolled with Medicare (CMS data updated October 2, 2026).
- 9831 Greenbelt Rd, Suite 101Lanham, MD 20706 (301) 552‑4100
Specialties
- Allergy/Immunologyprimary
- Internal Medicinealso
Other allergist and immunologists in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1255387288 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians