Michael L. Zager, MD
Internal Medicine Physician · Allentown, PA
Michael L. Zager, MD is an internal medicine physician with a practice address in Allentown, Pennsylvania, and NPI 1326087362, issued on Jun 5, 2006. Check the license (Pennsylvania MD052741L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Michael L. Zager
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD052741L PA
Self-reported in NPPES; status is on the state search - Practice location
- 798 Hausman RD, Allentown, PA 18104
- Phone
- (610) 336-8260
- Enumerated
- Jun 5, 2006
- Record last updated
- Mar 3, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (610) 336-8269
- Medicare enrollment
- Enrolled (PECOS I20100204000744); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 798 Hausman RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael L. Zager in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD052741LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
7,864 Medicare Part D claims for 550 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 425 claims were for opioids.
Most prescribed
- Atorvastatin Calcium387 claims
- Levothyroxine Sodium331 claims
- Amlodipine Besylate300 claims
- Lisinopril217 claims
- Simvastatin196 claims
- Losartan Potassium186 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.
Bills Medicare through 2 group practices
- Lehigh Valley Physician GroupAllentown, PA
- Phoenix Rehabilitation And Health Services IncCranberry Twp, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael L. Zager among 7,300 internal medicine physician records in Pennsylvania
Michael L. Zager, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1991 · median 2008 among the 4,208 with a school on file
- Record last updated2016 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
218 internal medicine physician records list a practice address in Allentown
They are 218 of the 5,904 NPPES records with a practice address in Allentown, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Allentown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Brandecker, MDAllentown, PA 181041023068376
- David Carney, MDAllentown, PA 181041245282094
- Jose Garcia, M.D.Allentown, PA 181041568441442
- Arthur Hoffman, M.D.Allentown, PA 181041508844333
- Glenn Kratzer, MDAllentown, PA 181041275583510
- Anil Kumar, M.D.Allentown, PA 181041093778359
- Sandra Latona, M.D.Allentown, PA 181041548212608
- Judith McDonald, MDAllentown, PA 181041558313403
Common questions
What is Michael L. Zager, MD's NPI number?
Michael L. Zager, MD's National Provider Identifier (NPI) is 1326087362, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael L. Zager, MD located?
The NPPES record lists a practice address at 798 Hausman RD, Allentown, PA, 18104. Phone: (610) 336-8260. Providers update this record themselves, so call before visiting.
How can I verify Michael L. Zager, MD's license?
NPPES lists Pennsylvania license number MD052741L, 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 L. Zager, MD prescribe under Medicare Part D?
In 2024, Michael L. Zager, MD had 7,864 Medicare Part D claims for 550 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.