William Martin Koenig, D.D.S.
Dentist · Baltimore, MD
William Martin Koenig, D.D.S. is a dentist with a practice address in Baltimore, Maryland, and NPI 1417190620, issued on Apr 17, 2009. Check the license (Maryland MD5441, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Martin Koenig
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- MD5441 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8424 Old Harford RD, Baltimore, MD 21234
- Phone
- (410) 665-3300
- Enumerated
- Apr 17, 2009
- Record last updated
- Apr 17, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 1,870 in Maryland → Look up another NPI →
Verify William Martin Koenig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license MD5441Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Martin Koenig among 1,870 dentist records in Maryland
William Martin Koenig, D.D.S. is one of 1,870 dentist records with a practice address in Maryland. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2009, is newer than 43% of them.
- NPI issued2009 · 43% of these records are older, 53% newer
- In a Medicare fileNo · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2009 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in Maryland
There are 1,870 dentist records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,870 in Maryland → Every provider in Baltimore → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Sung Chang, DMDParkville, MD 212341699949156
- Vincent Culotta, D,D,S,Baltimore, MD 212341629218722
- David Fox, D.D.S.Parkville, MD 212341598841801
- William Gaffney, DDSParkville, MD 212341093823411
- Ioana Ghita, DMD, PHDParkville, MD 212341902581960
- Tim Gough, DDSParkville, MD 212341104483791
- Steve Kokorelis, DDSParkville, MD 212341245904366
- William Kreul, DDSBaltimore, MD 212341285734731
Common questions
What is William Martin Koenig, D.D.S.'s NPI number?
William Martin Koenig, D.D.S.'s National Provider Identifier (NPI) is 1417190620, issued on Apr 17, 2009. An NPI identifies a provider in billing; it is not a license.
Where is William Martin Koenig, D.D.S. located?
The NPPES record lists a practice address at 8424 Old Harford RD, Baltimore, MD, 21234. Phone: (410) 665-3300. Providers update this record themselves, so call before visiting.
How can I verify William Martin Koenig, D.D.S.'s license?
NPPES lists Maryland license number MD5441, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity 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. 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.