Nicholas Guan, MD
NPI 1558503334 · Psychiatry Physician · New York, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Guan, MD is a Psychiatry Physician provider in New York, NY (NPI 1558503334).
Provider details
- NPI number
- 1558503334
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 252258 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
538 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 187 | $101 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 156 | $78 |
| Psychiatric Services Complicated By Communication Factor90785 | 96 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 53 | $146 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 46 | $99 |
Typical Medicare-allowed amounts for these services range $16–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 50 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 605 | 109 |
| Quetiapine Fumarate | 544 | 84 |
| Sertraline Hcl | 340 | 51 |
| Olanzapine | 311 | 56 |
| Mirtazapine | 286 | 49 |
| Clonazepam | 269 | 59 |
| Gabapentin | 213 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,620 across 106 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-03-25
- Last updated
- 2009-03-25
Frequently asked questions
- What is Nicholas Guan's NPI number?
- Nicholas Guan's National Provider Identifier (NPI) is 1558503334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Guan's specialty?
- Nicholas Guan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Guan located?
- Nicholas Guan's practice location on file with NPPES is 391 E 10th St, New York, NY 10009-4770.
- What is Nicholas Guan's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Guan is (212) 961-7446.
- Does Nicholas Guan accept Medicare?
- Nicholas Guan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Guan's NPI active?
- Yes — Nicholas Guan's NPI (1558503334) is active in the NPPES registry as of the last update on 2009-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.