Wei Bai, MD
NPI 1053567545 · Hematology & Oncology Physician · Santa Maria, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wei Bai, MD is a Hematology & Oncology Physician provider in Santa Maria, CA (NPI 1053567545).
Provider details
- NPI number
- 1053567545
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- C166101 (CA)
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,198 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 735 | $141 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 247 | $199 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 118 | $101 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 46 | $242 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 31 | $184 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 106 | 31 |
| Anastrozole | 64 | 20 |
| Hydroxyurea | 50 | 13 |
| Rivaroxabanbrand: Xarelto | 34 | — |
| Alendronate Sodium | 29 | — |
| Apixabanbrand: Eliquis | 21 | — |
| Abemaciclibbrand: Verzenio | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17,003 across 23 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
Additional practice locations (1)
- 850 Fair Oaks Ave Ste 100Arroyo Grande, CA 93420-3929Phone: (805) 473-0700Fax: (805) 474-5313
Registry dates
- Enumerated
- 2008-08-15
- Last updated
- 2026-04-22
- Certified
- 2026-04-22
Frequently asked questions
- What is Wei Bai's NPI number?
- Wei Bai's National Provider Identifier (NPI) is 1053567545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wei Bai's specialty?
- Wei Bai is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Wei Bai located?
- Wei Bai's practice location on file with NPPES is 1325 E Church St Ste 301, Santa Maria, CA 93454-5915.
- What is Wei Bai's phone number?
- The practice phone number listed in the NPPES registry for Wei Bai is (805) 349-9393.
- Does Wei Bai accept Medicare?
- Wei Bai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wei Bai's NPI active?
- Yes — Wei Bai's NPI (1053567545) is active in the NPPES registry as of the last update on 2026-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.