William Joseph Liaw, D.O.
Family Medicine Physician · Macungie, PA
William Joseph Liaw, D.O. is a family medicine physician with a practice address in Macungie, Pennsylvania, and NPI 1508825548, issued on Mar 20, 2006. Check the license (Pennsylvania OS008821L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- William Joseph Liaw
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OS008821L PA
Self-reported in NPPES; status is on the state search - Practice location
- 3760 Brookside RD, Macungie, PA 18062
- Phone
- (610) 628-7111
- Enumerated
- Mar 20, 2006
- Record last updated
- Dec 6, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (610) 628-7180
- Medicare enrollment
- Enrolled (PECOS I20070618000293); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Also registered at 3760 Brookside RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tamatha Urffer, CRNPFamily Nurse Practitioner1194205484
Verify William Joseph Liaw in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS008821LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average family medicine physician in 2024
8,131 Medicare Part D claims for 616 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 281 claims were for opioids.
Most prescribed
- Atorvastatin Calcium378 claims
- Amlodipine Besylate296 claims
- Levothyroxine Sodium276 claims
- Lisinopril268 claims
- Simvastatin235 claims
- Omeprazole223 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 95.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- St Lukes Physician Group IncMacungie, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Joseph Liaw among 7,483 family medicine physician records in Pennsylvania
William Joseph Liaw, D.O. is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1994 · median 2005 among the 4,529 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 family medicine physician records list a practice address in Macungie
They are 17 of the 246 NPPES records with a practice address in Macungie, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Macungie → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ihab Abdelaal, D.O.Macungie, PA 180621588944938
- Yasir Abunamous, M.D.Macungie, PA 180621366826232
- John Bessada, DOMacungie, PA 180621083270904
- Jill Bortz, D.O.Macungie, PA 180621831168400
- Radhika Chandramouli, M.D.Macungie, PA 180621386099968
- Eric Cochran, DOMacungie, PA 180621578509055
- Claudia Ferran, M.D.Macungie, PA 180621558414367
- Heather Fowler, D.O.Macungie, PA 180621528450574
Common questions
What is William Joseph Liaw, D.O.'s NPI number?
William Joseph Liaw, D.O.'s National Provider Identifier (NPI) is 1508825548, issued on Mar 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Joseph Liaw, D.O. located?
The NPPES record lists a practice address at 3760 Brookside RD, Macungie, PA, 18062. Phone: (610) 628-7111. Providers update this record themselves, so call before visiting.
How can I verify William Joseph Liaw, D.O.'s license?
NPPES lists Pennsylvania license number OS008821L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Joseph Liaw, D.O. prescribe under Medicare Part D?
In 2024, William Joseph Liaw, D.O. had 8,131 Medicare Part D claims for 616 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William Joseph Liaw, D.O.'s MIPS final score?
The 2023 MIPS final score is 95.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.