Aaron Lee Haag, DO
Internal Medicine Physician · Hershey, PA
Aaron Lee Haag, DO is an internal medicine physician with a practice address in Hershey, Pennsylvania, and NPI 1669934600, issued on Apr 1, 2019. Check the license (Pennsylvania OS022136, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Aaron Lee Haag
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS022136 PA
Self-reported in NPPES; status is on the state search - Practice location
- 500 University Dr, Hershey, PA 17033
- Phone
- (800) 243-1455
- Enumerated
- Apr 1, 2019
- Record last updated
- Jun 23, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 500 University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Aaron Lee Haag in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS022136Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
198 Medicare Part D claims for 39 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Trelegy Ellipta46 claims
- Albuterol Sulfate Hfa17 claims
- Anoro Ellipta17 claims
- Azithromycin17 claims
- Stiolto Respimat13 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): 93.8 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).
Aaron Lee Haag among 7,300 internal medicine physician records in Pennsylvania
Aaron Lee Haag, DO 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 2019, is newer than 74% of them.
- NPI issued2019 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2026 · 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).
124 internal medicine physician records list a practice address in Hershey
They are 124 of the 3,972 NPPES records with a practice address in Hershey, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Hershey → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andreas Achilleos, M.D.Hershey, PA 170331790749059
- Ayesha Ahmad, MDHershey, PA 170331558347757
- Edward Bollard, MDHershey, PA 170331942259957
- Cynthia Chuang, MDHershey, PA 170331386693216
- John Crawshaw, MDHershey, PA 170331598720823
- Hy Depamphilis, MDHershey, PA 170331609879691
- Inginia Genao, MDHershey, PA 170331417938291
- Stephen Henderson, M.D.Hershey, PA 170331669479424
Common questions
What is Aaron Lee Haag, DO's NPI number?
Aaron Lee Haag, DO's National Provider Identifier (NPI) is 1669934600, issued on Apr 1, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Lee Haag, DO located?
The NPPES record lists a practice address at 500 University Dr, Hershey, PA, 17033. Phone: (800) 243-1455. Providers update this record themselves, so call before visiting.
How can I verify Aaron Lee Haag, DO's license?
NPPES lists Pennsylvania license number OS022136, 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 Aaron Lee Haag, DO prescribe under Medicare Part D?
In 2024, Aaron Lee Haag, DO had 198 Medicare Part D claims for 39 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Aaron Lee Haag, DO's MIPS final score?
The 2023 MIPS final score is 93.8 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.