Quick answers
- Does Hao Wei Zhang accept Medicare assignment?
- Yes. Medicare's clinician data says Hao Wei Zhang 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 Hao Wei Zhang see?
- In 2024, CMS data shows 266 Original Medicare patients and 29,884 services for Hao Wei Zhang. This counts Original Medicare only and measures volume, not quality.
- What is Hao Wei Zhang's NPI number?
- 1558462424. 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 Hao Wei Zhang, 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 | 266 |
|---|---|
| Services billed to Medicare | 29,884 |
| Different services or procedures | 76 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)1,639 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)755 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)313 services
- Injection, heparin sodium, (heparin lock flush), per 10 units (J1642)203 services
- Infusion, normal saline solution, 250 cc (J7050)169 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%
- Diabetes68%
- Chronic kidney disease62%
- Arthritis59%
- Ischemic heart disease53%
Hospitals where Hao Wei Zhang works
Medicare's Facility Affiliation Data lists Hao Wei Zhang 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.
- Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050103
- Providence Saint Joseph Medical CenterBurbank, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050235
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
- San Gabriel Valley Medical CenterSan Gabriel, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050132
Practice locations
Addresses where Hao Wei Zhang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1411 S Garfield Ave, Suite 306Alhambra, CA 91801 (626) 312‑9500
- 1700 E Cesar E Chavez Ave, Suite 2600Los Angeles, CA 90033 (323) 264‑7238
- 3300 E S St, Suite 304Lakewood, CA 90805 (562) 232‑0550
Group practices
Medicare enrollment lists Hao Wei Zhang as a member of these groups (CMS data updated October 2, 2026).
- The Oncology Institute Ca, a Professional Corporation113 clinicians in the group
- Hao Wei Zhang MD Inc2 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Alhambra
Clinicians with the same Medicare primary specialty in Alhambra, CA — not a recommendation.
Other clinicians in The Oncology Institute Ca, a Professional Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558462424 |
| 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