Alfonso Tan, MD
NPI 1134296171 · Psychiatry Physician · Buffalo, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alfonso Tan, MD is a Psychiatry Physician provider in Buffalo, NY (NPI 1134296171).
Provider details
- NPI number
- 1134296171
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 217872 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
135 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 80 | $78 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 55 | $84 |
Typical Medicare-allowed amounts for these services range $78–$84 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 76 | 11 |
| Clonazepam | 69 | 12 |
| Fluoxetine Hcl | 63 | — |
| Quetiapine Fumarate | 48 | — |
| Sertraline Hcl | 35 | — |
| Zolpidem Tartrate | 33 | — |
| Divalproex Sodiumbrand: Divalproex Sodium Er |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-28
- Last updated
- 2011-02-14
Frequently asked questions
- What is Alfonso Tan's NPI number?
- Alfonso Tan's National Provider Identifier (NPI) is 1134296171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alfonso Tan's specialty?
- Alfonso Tan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alfonso Tan located?
- Alfonso Tan's practice location on file with NPPES is 462 Grider St, Buffalo, NY 14215-3021.
- What is Alfonso Tan's phone number?
- The practice phone number listed in the NPPES registry for Alfonso Tan is (716) 835-1246.
- Does Alfonso Tan accept Medicare?
- Alfonso Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alfonso Tan's NPI active?
- Yes — Alfonso Tan's NPI (1134296171) is active in the NPPES registry as of the last update on 2011-02-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.