William Kao, M.D.
NPI 1821257924 · Urology Physician · Largo, MD
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Kao, M.D. is a Urology Physician provider in Largo, MD (NPI 1821257924).
Provider details
- NPI number
- 1821257924
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 24214 (WV)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 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
58 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) |
|---|---|---|
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 26 | $63 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 17 | $100 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $96 |
Typical Medicare-allowed amounts for these services range $63–$100 (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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 281 | 111 |
| Finasteride | 135 | 51 |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 133 | 58 |
| Trospium Chloride | 48 | 20 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 31 | 25 |
| Oxycodone Hcl | 23 | 22 |
| Levofloxacin | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-03
- Last updated
- 2021-06-22
- Certified
- 2021-06-22
Frequently asked questions
- What is William Kao's NPI number?
- William Kao's National Provider Identifier (NPI) is 1821257924, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Kao's specialty?
- William Kao is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is William Kao located?
- William Kao's practice location on file with NPPES is 1221 Mercantile Ln, Largo, MD 20774-5374.
- What is William Kao's phone number?
- The practice phone number listed in the NPPES registry for William Kao is (301) 618-5633.
- Does William Kao accept Medicare?
- William Kao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Kao's NPI active?
- Yes — William Kao's NPI (1821257924) is active in the NPPES registry as of the last update on 2021-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.