Catherine N. Maslen, M.D.
Family Medicine Physician · Baltimore, MD
Catherine N. Maslen, M.D. is a family medicine physician with a practice address in Baltimore, Maryland, and NPI 1861435604, issued on Jun 13, 2006. Check the license (Maryland D0055499, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Catherine N. Maslen
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- D0055499 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1040 Park Ave Ste 200, Baltimore, MD 21201
- Phone
- (443) 738-0300
- Enumerated
- Jun 13, 2006
- Record last updated
- Jun 16, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (443) 738-0301
- Medicaid ID
- 213504300 MD
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,912 in Maryland → Look up another NPI →
Also registered at 1040 Park Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Charles Bergman, M.D.Emergency Medicine Physician1962468306
- Shanna Borell, LCSWSocial Worker1790561983
- Stephanie Davis, MD, PHDFamily Medicine Physician1427686260
- Abigail Dominijanni, PA-CPhysician Assistant1801243563
- Jacqueline Ejim, LCPCProfessional Counselor1861920282
Verify Catherine N. Maslen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0055499Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Catherine N. Maslen among 1,912 family medicine physician records in Maryland
Catherine N. Maslen, M.D. is one of 1,912 family medicine physician records with a practice address in Maryland. 73% 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 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 54% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2018 · 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 207Q00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Maryland
There are 1,912 family medicine physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,912 in Maryland → Every provider in Baltimore → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Beth Barnet, M.D.Baltimore, MD 212011487693370
- Robert Barthel, M.D., M.H.S.Baltimore, MD 212011982681581
- Richard Colgan, MDBaltimore, MD 212011760421549
- Stephanie Davis, MDBaltimore, MD 212011013976091
- Richard Dressler, M.D.Baltimore, MD 212011811952807
- Lenonie Hanley, M.DBaltimore, MD 212011255352811
- Niharika Khanna, MBBS, MD, DGOBaltimore, MD 212011225078678
- Eduardo Leon Guerrero, M.D.Baltimore, MD 212011407817778
Common questions
What is Catherine N. Maslen, M.D.'s NPI number?
Catherine N. Maslen, M.D.'s National Provider Identifier (NPI) is 1861435604, issued on Jun 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine N. Maslen, M.D. located?
The NPPES record lists a practice address at 1040 Park Ave Ste 200, Baltimore, MD, 21201. Phone: (443) 738-0300. Providers update this record themselves, so call before visiting.
How can I verify Catherine N. Maslen, M.D.'s license?
NPPES lists Maryland license number D0055499, 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.