Daniel Leonard Griffen, M.D.
Cardiovascular Disease Physician · Rockville, MD
Daniel Leonard Griffen, M.D. is a cardiovascular disease physician with a practice address in Rockville, Maryland, and NPI 1083640080, issued on Jun 23, 2006. Check the license (Maryland D0042110, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Daniel Leonard Griffen
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- D0042110 MD
Self-reported in NPPES; status is on the state search - Practice location
- 15225 Shady Grove RD, Rockville, MD 20850
- Phone
- (301) 670-3000
- Enumerated
- Jun 23, 2006
- Record last updated
- May 15, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (301) 924-0186
- Medicaid ID
- 781811400 MD
- Medicare enrollment
- Enrolled (PECOS I20080827000053); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1982
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 613 in Maryland → Look up another NPI →
Also registered at 15225 Shady Grove RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ed Ashtar, M.D., F.A.C.P.Hematology & Oncology Physician1043201817
- Alexander Asser, M.D.Clinical Cardiac Electrophysiology Physician1861656670
- Jason Badillo, P.A.Physician Assistant1396770202
- Jay Bernstein, MDPediatrics Physician1316946395
- Alan Chanales, MDPulmonary Disease Physician1093719023
- Michael Chen, M.D.Interventional Cardiology Physician1184650954
Verify Daniel Leonard Griffen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0042110Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average cardiovascular disease physician in 2024
6,249 Medicare Part D claims for 808 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium539 claims
- Eliquis481 claims
- Metoprolol Succinate479 claims
- Rosuvastatin Calcium389 claims
- Amlodipine Besylate387 claims
- Losartan Potassium375 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $776.30
27 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Adventist Physician Services IncSilver Spring, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Leonard Griffen among 613 cardiovascular disease physician records in Maryland
Daniel Leonard Griffen, M.D. is one of 613 cardiovascular disease physician records with a practice address in Maryland. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 22% of them.
- NPI issued2006 · 22% of these records are older, 36% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 1997 among the 389 with a school on file
- Record last updated2009 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Maryland
There are 613 cardiovascular disease physician records in Maryland.
All 613 in Maryland → Every provider in Rockville → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- David Brill, M.D.Rockville, MD 208501164483822
- Randall Brockman, M.D.Rockville, MD 208501699736900
- James Cockrell, MDRockville, MD 208501932161338
- Robert Dibianco, M.D.Rockville, MD 208501760444152
- Maureen Fennell, M.D.Rockville, MD 208501750343075
- Daniel Fernicola, M.D.Rockville, MD 208501033171442
- Laurence Kelley, M.D.Rockville, MD 208501083676498
- Louis Larca, M.D.Rockville, MD 208501669433322
Common questions
What is Daniel Leonard Griffen, M.D.'s NPI number?
Daniel Leonard Griffen, M.D.'s National Provider Identifier (NPI) is 1083640080, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Leonard Griffen, M.D. located?
The NPPES record lists a practice address at 15225 Shady Grove RD, Rockville, MD, 20850. Phone: (301) 670-3000. Providers update this record themselves, so call before visiting.
How can I verify Daniel Leonard Griffen, M.D.'s license?
NPPES lists Maryland license number D0042110, 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.
How much does Daniel Leonard Griffen, M.D. prescribe under Medicare Part D?
In 2024, Daniel Leonard Griffen, M.D. had 6,249 Medicare Part D claims for 808 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions 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. 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.