Quick answers
- Does Nnenna I. Nwogu accept Medicare assignment?
- Yes. Medicare's clinician data says Nnenna I. Nwogu 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 Nnenna I. Nwogu see?
- In 2024, CMS data shows 554 Original Medicare patients and 1,416 services for Nnenna I. Nwogu. This counts Original Medicare only and measures volume, not quality.
- What is Nnenna I. Nwogu's NPI number?
- 1255711461. 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 Nnenna I. Nwogu, 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 | 554 |
|---|---|
| Services billed to Medicare | 1,416 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)453 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)254 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)151 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)101 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)51 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 cholesterol75%
- High blood pressure60%
- Arthritis41%
- Osteoporosis31%
- Diabetes21%
- Chronic kidney disease21%
Hospitals where Nnenna I. Nwogu works
Medicare's Facility Affiliation Data lists Nnenna I. Nwogu at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050043
- Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050305
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
- Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050283
Practice locations
Addresses where Nnenna I. Nwogu is enrolled with Medicare (CMS data updated October 2, 2026).
- 1300 Crane StMenlo Park, CA 94025 (650) 498‑6500
- 20642 John DrCastro Valley, CA 94546 (888) 924‑1036
- 4725 1st St, Suite 100Pleasanton, CA 94566 (925) 462‑7060
- 6121 Hollis StEmeryville, CA 94608
Group practices
Medicare enrollment lists Nnenna I. Nwogu as a member of this group (CMS data updated October 2, 2026).
- University Healthcare Alliance327 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Menlo Park
Clinicians with the same Medicare primary specialty in Menlo Park, CA — not a recommendation.
Other clinicians in University Healthcare Alliance
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255711461 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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