John L. Flowers, M.D.
Surgery Physician · Baltimore, MD
John L. Flowers, M.D. is a surgery physician with a practice address in Baltimore, Maryland, and NPI 1891735965, issued on Jun 7, 2006. Check the license (Maryland D40524, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John L. Flowers
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- D40524 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6535 N Charles St, Baltimore, MD 21204
- Phone
- (410) 821-6260
- Enumerated
- Jun 7, 2006
- Record last updated
- Dec 17, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (410) 296-6936
- Medicaid ID
- 093601400 MD
- Medicare enrollment
- Enrolled (PECOS I20070208000684); accepts Medicare assignment
- Medical or professional school
- Hahnemann University College Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 672 in Maryland → Look up another NPI →
Also registered at 6535 N Charles St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John L. Flowers in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D40524Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average surgery physician in 2024
12 Medicare Part D claims, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Bills Medicare through one group practice
- Greater Baltimore Medical Center IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John L. Flowers among 672 surgery physician records in Maryland
John L. Flowers, M.D. is one of 672 surgery physician records with a practice address in Maryland. 69% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 55% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1984 · median 2003 among the 385 with a school on file
- Record last updated2009 · 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 208600000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Maryland
There are 672 surgery physician records in Maryland.
All 672 in Maryland → Every provider in Baltimore → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Ronald Clement, M.D.Towson, MD 212041407841786
- John Ledonne, M.D.Baltimore, MD 212041558452839
- Scott Maizel, M.D.Baltimore, MD 212041659322881
- John Richardson, MDTowson, MD 212041396827051
- Atena Rosak, MD, MPH, FACSTowson, MD 212041265526743
- Laurence Ross, MDTowson, MD 212041720160484
- Francis Rotolo, MDTowson, MD 212041679655401
- Jose Ruiz, MDTowson, MD 212041407922693
Common questions
What is John L. Flowers, M.D.'s NPI number?
John L. Flowers, M.D.'s National Provider Identifier (NPI) is 1891735965, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John L. Flowers, M.D. located?
The NPPES record lists a practice address at 6535 N Charles St, Baltimore, MD, 21204. Phone: (410) 821-6260. Providers update this record themselves, so call before visiting.
How can I verify John L. Flowers, M.D.'s license?
NPPES lists Maryland license number D40524, 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 L. Flowers, M.D. prescribe under Medicare Part D?
In 2024, John L. Flowers, M.D. had 12 Medicare Part D claims; the average among surgery physician prescribers was 147. 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.