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Internal Medicine

Teresa Chau, MD

Works at hospitals in Buffalo, NY · New York

Summary

Dr. Teresa Chau, MD is an internal medicine doctor at 40 La Riviere Dr, Suite 201, Buffalo, NY 14202. Phone: (914) 843-9637. Accepts Medicare assignment. In 2024, Teresa Chau had 47 Original Medicare patients and 169 services. NPI 1841286747. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 40 La Riviere Dr, Suite 201, Buffalo, NY 14202 · Directions (1 more location)
  • Phone: (914) 843‑9637
  • Medicare: Accepts Medicare assignment
  • Hospital: Kaleida Health
  • Group practice: Mobile Physician Services PLLC (+2 more)
  • Medical school: Wayne State University School Of Medicine · graduated 1982 (44 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Teresa Chau, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Teresa Chau accept Medicare assignment?
Yes. Medicare's clinician data says Teresa Chau 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 Teresa Chau see?
In 2024, CMS data shows 47 Original Medicare patients and 169 services for Teresa Chau. This counts Original Medicare only and measures volume, not quality.
What is Teresa Chau's NPI number?
1841286747. 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 Teresa Chau, 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 patients47
Services billed to Medicare169
Different services or procedures6
Participating Medicare providerYes
Average age of these patients87

Most frequent services

  1. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)113 services
  2. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)19 services
  3. Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)16 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%
  • Alzheimer's disease or dementia66%
  • Depression60%
  • High cholesterol53%
  • Arthritis53%
  • Anxiety45%

Hospitals where Teresa Chau works

Medicare's Facility Affiliation Data lists Teresa Chau 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.

  • Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005

Practice locations

Addresses where Teresa Chau is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Teresa Chau as a member of these groups (CMS data updated October 2, 2026).

  • Mobile Physician Services PLLC110 clinicians in the group
  • Physician Mobile Medical Care PC106 clinicians in the group
  • Partners Medical Group PLLC33 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Buffalo

Clinicians with the same Medicare primary specialty in Buffalo, NY — not a recommendation.

All internal medicine doctors in Buffalo →

Other clinicians in Mobile Physician Services PLLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolWayne State University School Of Medicine
Graduation year1982 (44 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1841286747
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians