Mark Hershel Eig, M.D.
Internal Medicine Physician · Silver Spring, MD
Mark Hershel Eig, M.D. is an internal medicine physician with a practice address in Silver Spring, Maryland, and NPI 1043377880, issued on Jan 2, 2007. Check the license (Maryland D024886, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mark Hershel Eig
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D024886 MD
Self-reported in NPPES; status is on the state search - Practice location
- 10801 Lockwood Dr, Silver Spring, MD 20901
- Phone
- (301) 592-1220
- Enumerated
- Jan 2, 2007
- Record last updated
- May 7, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (301) 592-0440
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 10801 Lockwood Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robyn Anderson, M.D.Critical Care Medicine (Internal Medicine) Physician1447288444
- Ashley ArtisObstetrics & Gynecology Physician1255679460
- Jessica Berger-Weiss, MDGynecology Physician1730161522
- Richard Broth, M.DMaternal & Fetal Medicine Physician1508854555
- James Butler, M.D.Gastroenterology Physician1295849222
- Franz Byars, N.P.Nurse Practitioner1477555795
Verify Mark Hershel Eig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D024886Check 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
187 Medicare Part D claims for 26 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Escitalopram Oxalate25 claims
- Bupropion Xl23 claims
- Ozempic18 claims
- Dextroamphetamine-Amphet Er14 claims
- Doxazosin Mesylate12 claims
- Fluoxetine Hcl12 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.
Mark Hershel Eig among 3,904 internal medicine physician records in Maryland
Mark Hershel Eig, M.D. 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 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 44% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2008 · 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).
186 internal medicine physician records list a practice address in Silver Spring
They are 186 of the 6,531 NPPES records with a practice address in Silver Spring, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Silver Spring → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Eyob Amdemichael, M.D.Silver Spring, MD 209011588979884
- Satish Angra, MDSilver Spring, MD 209011992810550
- Marc Averbach, M.D.Silver Spring, MD 209011568630440
- Rashid Baghai-Naeini, M.D.Silver Spring, MD 209011366479339
- Husna Baksh, M.D.Silver Spring, MD 209011740396092
- Tonya Hardy, MDSilver Spring, MD 209011316960099
- Kathryn Kelly, MDSilver Spring, MD 209011649447228
- Karin Klingman, MDSilver Spring, MD 209011477370237
Common questions
What is Mark Hershel Eig, M.D.'s NPI number?
Mark Hershel Eig, M.D.'s National Provider Identifier (NPI) is 1043377880, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Hershel Eig, M.D. located?
The NPPES record lists a practice address at 10801 Lockwood Dr, Silver Spring, MD, 20901. Phone: (301) 592-1220. Providers update this record themselves, so call before visiting.
How can I verify Mark Hershel Eig, M.D.'s license?
NPPES lists Maryland license number D024886, 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 Mark Hershel Eig, M.D. prescribe under Medicare Part D?
In 2024, Mark Hershel Eig, M.D. had 187 Medicare Part D claims for 26 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.