Quick answers
- Does Nicholas N. Guan accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas N. Guan 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 Nicholas N. Guan see?
- In 2024, CMS data shows 40 Original Medicare patients and 589 services for Nicholas N. Guan. This counts Original Medicare only and measures volume, not quality.
- What is Nicholas N. Guan's NPI number?
- 1558503334. 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 Nicholas N. Guan, 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 | 40 |
|---|---|
| Services billed to Medicare | 589 |
| Different services or procedures | 15 |
| 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)187 services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)156 services
- Psychiatric services complicated by communication factor (90785)96 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)53 services
- Psychotherapy with evaluation and management visit, 45 minutes (90836)46 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%
- Depression60%
- Anxiety55%
- Diabetes45%
- Alzheimer's disease or dementia45%
Practice locations
Addresses where Nicholas N. Guan is enrolled with Medicare (CMS data updated October 2, 2026).
- 53 Elizabeth St, 5aNew York, NY 10013 (212) 966‑0819
- 749 61st StBrooklyn, NY 11220
- 8686 Bay Pkwy, Suite M1Brooklyn, NY 11214 (718) 372‑0888
Group practices
Medicare enrollment lists Nicholas N. Guan as a member of these groups (CMS data updated October 2, 2026).
- Chinatown True Care Medical PLLC241 clinicians in the group
- Lawrence y. Liang Medical PC2 clinicians in the group
Specialties
- Psychiatryprimary
- Geriatric Psychiatryalso
Other psychiatrists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in Chinatown True Care Medical PLLC
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) | 1558503334 |
| 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