Quick answers
- Does Laishang P. Zhang accept Medicare assignment?
- Yes. Medicare's clinician data says Laishang P. 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 Laishang P. Zhang see?
- In 2024, CMS data shows 264 Original Medicare patients and 3,420 services for Laishang P. Zhang. This counts Original Medicare only and measures volume, not quality.
- What is Laishang P. Zhang's NPI number?
- 1235143942. 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 Laishang P. 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 | 264 |
|---|---|
| Services billed to Medicare | 3,420 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 63 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)2,081 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)853 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)225 services
- Hospital discharge day management, more than 30 minutes (99239)198 services
- Hospital discharge day management, 30 minutes or less (99238)25 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%
- Depression75%
- Anxiety75%
- Arthritis45%
- Chronic kidney disease38%
Hospitals where Laishang P. Zhang works
Medicare's Facility Affiliation Data lists Laishang P. 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.
- Gateway Regional Medical CenterGranite City, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140125
- Mercy Hospital JoplinJoplin, MO · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 260001
- Mercy Hospital SpringfieldSpringfield, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260065
- SSM Health St Mary's Hospital - St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260091
- SSM St Joseph Health CenterSaint Charles, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260005
Practice locations
Addresses where Laishang P. Zhang is enrolled with Medicare (CMS data updated October 2, 2026).
- 15740 S Outer 40 RdChesterfield, MO 63017 (636) 237‑4200
- 17720 Corporate Woods DrSan Antonio, TX 78259 (210) 491‑3512
- 2044 Madison AveGranite City, IL 62040 (314) 549‑8494
- 777 Craig Rd, Suite 200Creve Coeur, MO 63141 (314) 549‑8494
Group practices
Medicare enrollment lists Laishang P. Zhang as a member of these groups (CMS data updated October 2, 2026).
- Mercy Aco Clinical Services Inc170 clinicians in the group
- Clinical Research Associates PC20 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Other clinicians in Mercy Aco Clinical Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 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) | 1235143942 |
| 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