John Thomas Carroll, D.O.
General Practice Physician · Cockeysville, MD
John Thomas Carroll, D.O. is a general practice physician with a practice address in Cockeysville, Maryland, and NPI 1457573578, issued on May 2, 2007. Check the license (Maryland H47469, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John Thomas Carroll
- Credential
- D.O.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- H47469 MD
Self-reported in NPPES; status is on the state search - Practice location
- 9832 York RD, Cockeysville, MD 21030
- Phone
- (410) 628-1861
- Enumerated
- May 2, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 628-1862
- Medicare enrollment
- Enrolled (PECOS I20120716000469); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 385 in Maryland → Look up another NPI →
Verify John Thomas Carroll in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H47469Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average general practice physician in 2024
38 Medicare Part D claims for 30 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Silverstein Medical LLCHavre De Grace, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thomas Carroll among 385 general practice physician records in Maryland
John Thomas Carroll, D.O. is one of 385 general practice physician records with a practice address in Maryland. 26% 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 16% of them.
- NPI issued2007 · 16% of these records are older, 77% newer
- In a Medicare fileYes · 26% of these records are
- In the CMS Doctors and Clinicians fileYes · 14% of these records are
- Graduated1993 · median 1995 among the 52 with a school on file
- Record last updated2007 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Maryland
There are 385 general practice physician records in Maryland.
All 385 in Maryland → Every provider in Cockeysville → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Terence McGuire, MDDavidsonville, MD 210351508912049
- John Classen, MDEdgewater, MD 210371215037676
- Marie Bergmeyer, DOEllicott City, MD 210421639602402
- Byung-Oh Kim, M.D.Ellicott City, MD 210421043377823
- Young-Rok Shin, M.D.Ellicott City, MD 210421942516083
- Eun A Kim, MDColumbia, MD 210441700291689
- Chioma Umeh, DOColumbia, MD 210441477979029
- Jacinth Brooks, MDColumbia, MD 210451225117211
Common questions
What is John Thomas Carroll, D.O.'s NPI number?
John Thomas Carroll, D.O.'s National Provider Identifier (NPI) is 1457573578, issued on May 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Carroll, D.O. located?
The NPPES record lists a practice address at 9832 York RD, Cockeysville, MD, 21030. Phone: (410) 628-1861. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Carroll, D.O.'s license?
NPPES lists Maryland license number H47469, 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 John Thomas Carroll, D.O. prescribe under Medicare Part D?
In 2024, John Thomas Carroll, D.O. had 38 Medicare Part D claims for 30 beneficiaries; the average among general practice physician prescribers was 3,030. 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.