Quick answers
- Does Johannelda J. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Johannelda J. Diaz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Johannelda J. Diaz see?
- In 2024, CMS data shows 83 Original Medicare patients and 422 services for Johannelda J. Diaz. This counts Original Medicare only and measures volume, not quality.
- What is Johannelda J. Diaz's NPI number?
- 1457850141. 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 Johannelda J. Diaz, 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 | 83 |
|---|---|
| Services billed to Medicare | 422 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 59 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)122 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)100 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)71 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)24 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)22 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%
- Anxiety75%
- Depression52%
- Diabetes51%
- Arthritis46%
Practice locations
Addresses where Johannelda J. Diaz is enrolled with Medicare (CMS data updated October 2, 2026).
- 650 Rancocas RdWestampton, NJ 08060 (609) 267‑7000
Group practices
Medicare enrollment lists Johannelda J. Diaz as a member of this group (CMS data updated October 2, 2026).
- UHS of Hampton Inc18 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Westampton
Clinicians with the same Medicare primary specialty in Westampton, NJ — not a recommendation.
Other clinicians in UHS of Hampton Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457850141 |
| 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