Quick answers
- Does Louis Zhang accept Medicare assignment?
- Yes. Medicare's clinician data says Louis 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 Louis Zhang see?
- In 2024, CMS data shows 441 Original Medicare patients and 1,181 services for Louis Zhang. This counts Original Medicare only and measures volume, not quality.
- What is Louis Zhang's NPI number?
- 1952843757. 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 Louis 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 | 441 |
|---|---|
| Services billed to Medicare | 1,181 |
| Different services or procedures | 115 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)134 services
- Complete ultrasound study of arm and leg arteries (93923)128 services
- Ultrasound of both sides of head and neck blood flow (93880)111 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)102 services
- Ultrasound of leg arteries or artery grafts (93925)66 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%
- Arthritis48%
- Ischemic heart disease38%
- Diabetes37%
- Chronic kidney disease35%
Hospitals where Louis Zhang works
Medicare's Facility Affiliation Data lists Louis 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.
- Community Hospital of the Monterey PeninsulaMonterey, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050145
- Prov Sacred HRT Medical Center & Childs HospitalSpokane, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500054
Practice locations
Addresses where Louis Zhang is enrolled with Medicare (CMS data updated October 2, 2026).
- 23625 Holman HwyMonterey, CA 93940 (831) 624‑5311
- 23845 Holman Hwy, Suite 109Monterey, CA 93940 (831) 241‑9200
Group practices
Medicare enrollment lists Louis Zhang as a member of these groups (CMS data updated October 2, 2026).
- Community Hospital of the Monterey Peninsula146 clinicians in the group
- Montage Medical Group127 clinicians in the group
Specialties
- Vascular Surgeryprimary
Other vascular surgeons in Monterey
Clinicians with the same Medicare primary specialty in Monterey, CA — not a recommendation.
Other clinicians in Community Hospital of the Monterey Peninsula
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952843757 |
| 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