William Liaw, D.O.
NPI 1508825548 · Family Medicine Physician · Macungie, PA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Liaw, D.O. is a Family Medicine Physician provider in Macungie, PA (NPI 1508825548).
Provider details
- NPI number
- 1508825548
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OS008821L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
1,166 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 497 | $126 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 221 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 196 | $129 |
| Administration of Influenza Virus VaccineG0008 | 85 | $31 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 59 | $89 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 146 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 378 | 102 |
| Amlodipine Besylate | 296 | 84 |
| Levothyroxine Sodium | 276 | 69 |
| Lisinopril | 268 | 75 |
| Simvastatin | 235 | 64 |
| Omeprazole | 223 | 64 |
| Rosuvastatin Calcium | 211 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-20
- Last updated
- 2017-12-06
Frequently asked questions
- What is William Liaw's NPI number?
- William Liaw's National Provider Identifier (NPI) is 1508825548, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Liaw's specialty?
- William Liaw is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Liaw located?
- William Liaw's practice location on file with NPPES is 3760 Brookside Rd, Macungie, PA 18062-1741.
- What is William Liaw's phone number?
- The practice phone number listed in the NPPES registry for William Liaw is (610) 628-7111.
- Does William Liaw accept Medicare?
- William Liaw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Liaw's NPI active?
- Yes — William Liaw's NPI (1508825548) is active in the NPPES registry as of the last update on 2017-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.