Michael J. Chaffier, D.O.
Family Medicine Physician · Bethlehem, PA
Michael J. Chaffier, D.O. is a family medicine physician with a practice address in Bethlehem, Pennsylvania, and NPI 1558461616, issued on Sep 25, 2006. Check the license (Pennsylvania OS002810L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Michael J. Chaffier
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OS002810L PA
Self-reported in NPPES; status is on the state search - Practice location
- 3833 Linden St, Bethlehem, PA 18020
- Phone
- (610) 838-0404
- Enumerated
- Sep 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Also registered at 3833 Linden St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vasumathy Kumaresan, M.D,Internal Medicine Physician1811000631
- Brian Kuronya, DOFamily Medicine Physician1831202654
Verify Michael J. Chaffier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS002810LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
84 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Ezetimibe17 claims
- Amlodipine Besylate14 claims
- Eliquis14 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.
Michael J. Chaffier among 7,483 family medicine physician records in Pennsylvania
Michael J. Chaffier, 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 fileNo · 61% of these records are
- Record last updated2007 · 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).
136 family medicine physician records list a practice address in Bethlehem
They are 136 of the 4,797 NPPES records with a practice address in Bethlehem, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Bethlehem → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Michael Carnathan, MDBethlehem, PA 180201851529093
- Louis Cimorelli, D.O.Bethlehem, PA 180201255302246
- Frank Defrank, MDBethlehem, PA 180201114987849
- Jennifer Keller, DOBethlehem, PA 180201124292552
- Brian Kuronya, DOBethlehem, PA 180201831202654
- George Miles, D.O.Bethlehem, PA 180201396737458
- Mary Anne Pajel-Sio, M.D.Bethlehem, PA 180201952379315
- Tiana Shekari, DOBethlehem, PA 180201639132426
Common questions
What is Michael J. Chaffier, D.O.'s NPI number?
Michael J. Chaffier, D.O.'s National Provider Identifier (NPI) is 1558461616, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Chaffier, D.O. located?
The NPPES record lists a practice address at 3833 Linden St, Bethlehem, PA, 18020. Phone: (610) 838-0404. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Chaffier, D.O.'s license?
NPPES lists Pennsylvania license number OS002810L, 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 Michael J. Chaffier, D.O. prescribe under Medicare Part D?
In 2024, Michael J. Chaffier, D.O. had 84 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.