Quick answers
- Does Fang Bai accept Medicare assignment?
- Yes. Medicare's clinician data says Fang Bai 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 Fang Bai see?
- In 2024, CMS data shows 553 Original Medicare patients and 4,743 services for Fang Bai. This counts Original Medicare only and measures volume, not quality.
- What is Fang Bai's NPI number?
- 1639564776. 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 Fang Bai, 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 | 553 |
|---|---|
| Services billed to Medicare | 4,743 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)169 services
- Measurement of brain wave activity (eeg), awake and asleep (95819)122 services
- Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional (95720)108 services
- Measurement of brain wave activity (eeg), 2-12 hours with health care professional review and report (95717)62 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)53 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 cholesterol74%
- Arthritis49%
- Anxiety47%
- Depression46%
- Chronic kidney disease42%
Hospitals where Fang Bai works
Medicare's Facility Affiliation Data lists Fang Bai 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.
- Mercy Hospital AdaAda, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370020
- Mercy Hospital Fort SmithFort Smith, AR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 040062
- Mercy Hospital JoplinJoplin, MO · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 260001
- Mercy Hospital Northwest ArkansasRogers, AR · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 040010
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
Practice locations
Addresses where Fang Bai is enrolled with Medicare (CMS data updated October 2, 2026).
- 4455 Duncan AveSaint Louis, MO 63110 (314) 362‑1408
- 621 S New Ballas Rd, 5003bSaint Louis, MO 63141 (314) 227‑2020
Group practices
Medicare enrollment lists Fang Bai as a member of these groups (CMS data updated October 2, 2026).
- Washington University3,029 clinicians in the group
- Mercy Clinic Neurology, LLC20 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in Washington University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639564776 |
| 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