Mark Aaron Denby, LMSW MASTER
Social Worker · Gaithersburg, MD
Mark Aaron Denby, LMSW MASTER is a social worker with a practice address in Gaithersburg, Maryland, and NPI 1699511873, issued on Jul 8, 2024. Check the license (Maryland 29906, 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
- Mark Aaron Denby
- Credential
- LMSW MASTER
- Primary taxonomy
- Social Worker 104100000X
- License number
- 29906 MD
Self-reported in NPPES; status is on the state search - Practice location
- 232 Main St, Gaithersburg, MD 20878
- Phone
- (240) 912-4894
- Enumerated
- Jul 8, 2024
- Record last updated
- Jul 8, 2024
- Entity
- Type 1 · individual
8 nearest social worker records → All 4,073 in Maryland → Look up another NPI →
Also registered at 232 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tiffany Hebron, LCSW-CClinical Social Worker1699266056
- Jaylynn Mayo, LMSWSocial Worker1326827189
Verify Mark Aaron Denby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 29906Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Aaron Denby among 4,073 social worker records in Maryland
Mark Aaron Denby, LMSW MASTER is one of 4,073 social worker records with a practice address in Maryland. 6% 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 2024, is newer than 73% of them.
- NPI issued2024 · 73% of these records are older, 18% newer
- In a Medicare fileNo · 6% of these records are
- In the CMS Doctors and Clinicians fileNo · 9% of these records are
- Record last updated2024 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
135 social worker records list a practice address in Gaithersburg
They are 135 of the 2,580 NPPES records with a practice address in Gaithersburg, and 4,073 social worker records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 4,073 in Maryland → Every provider in Gaithersburg → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Deborah Alman, LCSWCGaithersburg, MD 208781326192154
- Michele Arora, LCSW-CGaithersburg, MD 208781649827148
- Sydnie Butin, LCSW-CGaithersburg, MD 208781710520861
- Jessica FisherGaithersburg, MD 208781134812480
- Anna Gordin, LCSW CGaithersburg, MD 208781730293788
- Grace Lee, LMSWNorth Potomac, MD 208781609505833
- Jill Lyons, LGSWGaithersburg, MD 208781750573481
- Aisha MartinGaithersburg, MD 208781720407836
Common questions
What is Mark Aaron Denby, LMSW MASTER's NPI number?
Mark Aaron Denby, LMSW MASTER's National Provider Identifier (NPI) is 1699511873, issued on Jul 8, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Mark Aaron Denby, LMSW MASTER located?
The NPPES record lists a practice address at 232 Main St, Gaithersburg, MD, 20878. Phone: (240) 912-4894. Providers update this record themselves, so call before visiting.
How can I verify Mark Aaron Denby, LMSW MASTER's license?
NPPES lists Maryland license number 29906, 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.