Jason Slack, D.O.
Internal Medicine Physician · Hagerstown, MD
Jason Slack, D.O. is an internal medicine physician with a practice address in Hagerstown, Maryland, and NPI 1043692197, issued on Jun 25, 2015. Check the license (Maryland H96459, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Jason Slack
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- H96459 MD
05-40745 KS
2015017143 MO
Self-reported in NPPES; status is on the state search - Practice location
- 11116 Medical Campus RD, Hagerstown, MD 21742
- Phone
- (301) 790-8804
- Enumerated
- Jun 25, 2015
- Record last updated
- Dec 29, 2023
- Medicare enrollment
- Enrolled (PECOS I20180412001419); accepts Medicare assignment
- Medical or professional school
- Edward Via Col Of Osteo Medicine-Virginia Campus, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 11116 Medical Campus RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Surya Kiran Acharya, MDInternal Medicine Physician1316678188
- Gerald AdcockNurse Practitioner1083496970
- Audrey Adkins, D.O.Emergency Medicine Physician1447578661
- Tayo Ahmed, MDPediatrics Physician1629707955
- Sumaira Ali, M.DInternal Medicine Physician1164857462
Verify Jason Slack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H96459Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
498 Medicare Part D claims for 261 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Prednisone47 claims
- Cefdinir28 claims
- Amoxicillin-Clavulanate Potass25 claims
- Atorvastatin Calcium22 claims
- Metoprolol Tartrate21 claims
- Furosemide17 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 one group practice
- Meritus Medical Center IncHagerstown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Slack among 3,904 internal medicine physician records in Maryland
Jason Slack, D.O. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 77% of them.
- NPI issued2015 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2003 among the 2,445 with a school on file
- Record last updated2023 · 59% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 internal medicine physician records list a practice address in Hagerstown
They are 39 of the 2,414 NPPES records with a practice address in Hagerstown, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Hagerstown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sumaira Ali, M.DHagerstown, MD 217421164857462
- Sarah Arshad, M.D.Hagerstown, MD 217421255744157
- Chuckia Brown-Tisdale, M.D.Hagerstown, MD 217421306836804
- Samuel Chan, M.D.Hagerstown, MD 217421972538841
- Jerry Correces, M.D.Hagerstown, MD 217421770535320
- Vikram Gunnala, DOHagerstown, MD 217421356414890
- Li Han, M.D.Hagerstown, MD 217421972866630
- Steven Hatleberg, M.D.Hagerstown, MD 217421992768600
Common questions
What is Jason Slack, D.O.'s NPI number?
Jason Slack, D.O.'s National Provider Identifier (NPI) is 1043692197, issued on Jun 25, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Jason Slack, D.O. located?
The NPPES record lists a practice address at 11116 Medical Campus RD, Hagerstown, MD, 21742. Phone: (301) 790-8804. Providers update this record themselves, so call before visiting.
How can I verify Jason Slack, D.O.'s license?
NPPES lists Maryland license number H96459, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jason Slack, D.O. prescribe under Medicare Part D?
In 2024, Jason Slack, D.O. had 498 Medicare Part D claims for 261 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.