Dennis M. Hannon, M.D.
Adult Medicine Physician · Olney, MD
Dennis M. Hannon, M.D. is an adult medicine physician with a practice address in Olney, Maryland, and NPI 1053314815, issued on May 24, 2005. Check the license (Maryland D0023124, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Dennis M. Hannon
- Credential
- M.D.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- D0023124 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3300 Olney Sandy Spring RD, Olney, MD 20832
- Phone
- (301) 774-7334
- Enumerated
- May 24, 2005
- Record last updated
- Feb 16, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (301) 774-7311
- Entity
- Type 1 · individual
Also registered at 3300 Olney Sandy Spring RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maislyn Christie, M.D.Pediatrics Physician1619952728
- Amy Miller, LMSWClinical Social Worker1265284830
Verify Dennis M. Hannon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0023124Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Adult Medicine Physician providers in Maryland
There are 59 adult medicine physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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Common questions
What is Dennis M. Hannon, M.D.'s NPI number?
Dennis M. Hannon, M.D.'s National Provider Identifier (NPI) is 1053314815, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Dennis M. Hannon, M.D. located?
The NPPES record lists a practice address at 3300 Olney Sandy Spring RD, Olney, MD, 20832. Phone: (301) 774-7334. Providers update this record themselves, so call before visiting.
How can I verify Dennis M. Hannon, M.D.'s license?
NPPES lists Maryland license number D0023124, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.