Mark Zwanger, M.D.
Emergency Medicine Physician · Betterton, MD
Mark Zwanger, M.D. is an emergency medicine physician with a practice address in Betterton, Maryland, and NPI 1285659185, issued on Jul 12, 2006. Check the license (Maryland D0066934, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mark Zwanger
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- D0066934 MD
MD041325E PA
Self-reported in NPPES; status is on the state search - Practice location
- 15 Bayside Blvd, Betterton, MD 21610
- Phone
- (215) 704-2818
- Enumerated
- Jul 12, 2006
- Record last updated
- May 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (215) 440-8689
- Medicaid IDs
- 6396003 NJ
001123909 PA - Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,190 in Maryland → Look up another NPI →
Verify Mark Zwanger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0066934Check 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 emergency medicine physician in 2024
14 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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 Zwanger among 1,190 emergency medicine physician records in Maryland
Mark Zwanger, M.D. is one of 1,190 emergency 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2015 · 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 207P00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Maryland
There are 1,190 emergency medicine physician records in Maryland.
All 1,190 in Maryland → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Fred Bailor, DOCambridge, MD 216131689628059
- Jeffrey Beck, DOCambridge, MD 216131386691392
- Thomas Chiccone, MDCambridge, MD 216131639123151
- Frank Ciocci, MDCambridge, MD 216131659325140
- Mark Deguzman, MDCambridge, MD 216131437170115
- Christine Galan, MDCambridge, MD 216131639123086
- Michael Joyce, MDCambridge, MD 216131164460333
- Fernando Reachy Guadarrama, MDCambridge, MD 216131689256620
Common questions
What is Mark Zwanger, M.D.'s NPI number?
Mark Zwanger, M.D.'s National Provider Identifier (NPI) is 1285659185, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Zwanger, M.D. located?
The NPPES record lists a practice address at 15 Bayside Blvd, Betterton, MD, 21610. Phone: (215) 704-2818. Providers update this record themselves, so call before visiting.
How can I verify Mark Zwanger, M.D.'s license?
NPPES lists Maryland license number D0066934, 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 Zwanger, M.D. prescribe under Medicare Part D?
In 2024, Mark Zwanger, M.D. had 14 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.