Mary M. Leonard, PHD
Clinical Psychologist · Arnold, MD
Mary M. Leonard, PHD is a clinical psychologist with a practice address in Arnold, Maryland, and NPI 1134362908, issued on Apr 9, 2009. Check the license (Maryland 01090, 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
- Mary M. Leonard
- Credential
- PHD
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 01090 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1509 Ritchie Hwy Ste F, Arnold, MD 21012
- Phone
- (410) 757-2077
- Enumerated
- Apr 9, 2009
- Record last updated
- Apr 9, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (410) 757-5184
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 1,499 in Maryland → Look up another NPI →
Also registered at 1509 Ritchie Hwy Ste F
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Suzanne Linkroum, PHDClinical Psychologist1720381932
Verify Mary M. Leonard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 01090Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mary M. Leonard among 1,499 clinical psychologist records in Maryland
Mary M. Leonard, PHD is one of 1,499 clinical psychologist records with a practice address in Maryland. 10% 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 44% of them.
- NPI issued2009 · 44% of these records are older, 53% newer
- In a Medicare fileNo · 10% of these records are
- In the CMS Doctors and Clinicians fileNo · 18% of these records are
- Record last updated2009 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 clinical psychologist records list a practice address in Arnold
They are 9 of the 307 NPPES records with a practice address in Arnold, and 1,499 clinical psychologist records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,499 in Maryland → Every provider in Arnold → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Jeffrey Barnett, PSY.D.Arnold, MD 210121982932307
- Susan Cecere, PHDArnold, MD 210121457483539
- Holly Hiltner-Fullmer, PSY.D.Arnold, MD 210121356777106
- Suzanne Linkroum, PHDArnold, MD 210121720381932
- Arika Otani, ED.D.Arnold, MD 210121811150485
- Angelica Shiels, PSYDArnold, MD 210121235523614
- Alysia Sierra, PSY.DArnold, MD 210121720458946
- Jillian SolomonArnold, MD 210121598433286
Common questions
What is Mary M. Leonard, PHD's NPI number?
Mary M. Leonard, PHD's National Provider Identifier (NPI) is 1134362908, issued on Apr 9, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mary M. Leonard, PHD located?
The NPPES record lists a practice address at 1509 Ritchie Hwy Ste F, Arnold, MD, 21012. Phone: (410) 757-2077. Providers update this record themselves, so call before visiting.
How can I verify Mary M. Leonard, PHD's license?
NPPES lists Maryland license number 01090, 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.