William Tsao, MD
NPI 1073923777 · Neurology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Tsao, MD is a Neurology Physician provider in Baltimore, MD (NPI 1073923777).
Provider details
- NPI number
- 1073923777
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D87508 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 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
645 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 142 | $187 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, Complete Study95886 | 104 | $100 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 104 | $133 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 88 | $229 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 74 | $177 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 135 | 58 |
| Pregabalin | 33 | 16 |
| Nortriptyline Hcl | 30 | — |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 24 | — |
| Levetiracetam | 21 | — |
| Pyridostigmine Bromide | 21 | — |
| Duloxetine Hcl | 17 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$81 across 3 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
- 2014-05-02
- Last updated
- 2019-08-19
Frequently asked questions
- What is William Tsao's NPI number?
- William Tsao's National Provider Identifier (NPI) is 1073923777, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Tsao's specialty?
- William Tsao is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is William Tsao located?
- William Tsao's practice location on file with NPPES is 600 N Wolfe Street, Baltimore, MD 21287-0010.
- What is William Tsao's phone number?
- The practice phone number listed in the NPPES registry for William Tsao is (410) 614-9671.
- Does William Tsao accept Medicare?
- William Tsao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Tsao's NPI active?
- Yes — William Tsao's NPI (1073923777) is active in the NPPES registry as of the last update on 2019-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.