Maria T. Defendini, MD
Anesthesiology Physician · Olney, MD
Maria T. Defendini, MD is an anesthesiology physician with a practice address in Olney, Maryland, and NPI 1609991140, issued on Mar 21, 2007. Check the license (Maryland D63221, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Maria T. Defendini
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- D63221 MD
Self-reported in NPPES; status is on the state search - Practice location
- 18101 Prince Philip Dr, Olney, MD 20832
- Phone
- (301) 598-5100
- Enumerated
- Mar 21, 2007
- Record last updated
- Jul 16, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20051019001102); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,253 in Maryland → Look up another NPI →
Also registered at 18101 Prince Philip Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jason Ainsfield, LCSW-CClinical Social Worker1235086653
- Rosemary Akinkunle, NURSE PRACTITIONERFamily Nurse Practitioner1538778717
- Golfam Ali SobhaniSurgical Assistant1568142297
- Bridgit Alumkara, M.D.Internal Medicine Physician1669629358
- Maria Araneta, PA-CMedical Physician Assistant1124556857
- Janice Bediako-Smith, PAMedical Physician Assistant1538136619
Verify Maria T. Defendini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D63221Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Medstar Medical Group II LLCWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria T. Defendini among 1,253 anesthesiology physician records in Maryland
Maria T. Defendini, MD is one of 1,253 anesthesiology physician records with a practice address in Maryland. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 51% of them.
- NPI issued2007 · 51% of these records are older, 39% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2001 · median 2005 among the 813 with a school on file
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Maryland
There are 1,253 anesthesiology physician records in Maryland.
All 1,253 in Maryland → Every provider in Olney → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Brian Condon, MDOlney, MD 208321457509697
- John Hamel, M.D.Olney, MD 208321225062896
- Richard Kirby, MDOlney, MD 208321619024320
- Nishith Dave, MDBethesda, MD 208171467419663
- Quentin Fisher, MDBethesda, MD 208171033139662
- Harry Greenspun, M.D.Bethesda, MD 208171104081694
- Peter Horowitz, MDBethesda, MD 208171740517655
- Neda Knight, MDBethesda, MD 208171497012272
Common questions
What is Maria T. Defendini, MD's NPI number?
Maria T. Defendini, MD's National Provider Identifier (NPI) is 1609991140, issued on Mar 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maria T. Defendini, MD located?
The NPPES record lists a practice address at 18101 Prince Philip Dr, Olney, MD, 20832. Phone: (301) 598-5100. Providers update this record themselves, so call before visiting.
How can I verify Maria T. Defendini, MD's license?
NPPES lists Maryland license number D63221, 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. Medicare files from data.cms.gov. 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.