Dr. John L. Flowers, MD
- Medicare services, 2024
- 716
- Medicare patients, 2024
- 472
- Part D claims, 2024
- 12
- Hospital affiliations
- 1
- Industry payments
- $8,026
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Flowers' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John L. Flowers is a general surgeon in Towson, Maryland
Dr. Flowers practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Dr. Flowers' NPI, 1891735965, was assigned on June 7, 2006. Dr. Flowers graduated from Hahnemann University College of Medicine in 1984. Dr. Flowers holds Maryland license D40524.
- NPI
- 1891735965NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426050113
- NPI enumeration date
- June 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John L. Flowers practices at Greater Baltimore Medical Center in Baltimore, Maryland
Dr. Flowers' primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000.
- Greater Baltimore Medical Center6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
Source: Dmand AI Affiliation Data
Dr. John L. Flowers is affiliated with 2 sites of care and 2 medical groups
Dr. Flowers' primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. The medical group on file is Greater Baltimore Medical Center (GBMC). Dmand AI also links Dr. Flowers to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John L. Flowers' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flowers practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across GBMC HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John L. Flowers is one of 532 general surgeons in Maryland
Surgery is Dr. Flowers' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Flowers is licensed in Maryland.
Specialties and state licenses
- Surgery, MarylandPrimary
General surgeons near Dr. Flowers
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John L. Flowers billed Medicare for 716 services in 2024
CMS data shows 716 Medicare services from Dr. Flowers across 7 procedure codes in 2024, for 472 Medicare patients. Medicare paid $57,303 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Flowers' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5162024: 71639%
Dr. Flowers compared with the Maryland median for general surgeons, 2024
- Dr. Flowers
- Maryland median
- Medicare services
- 716vs 2303.1 times
- Medicare patients
- 472vs 1622.9 times
- Part D claims
- 17vs 2635% below
Medians across 485 general surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Flowers' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Flowers?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Flowers and other general surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John L. Flowers treated 472 Medicare patients in 2024, average age 77
CMS counts 472 Medicare patients who saw Dr. Flowers in 2024. The largest group is 75 to 84, with 189 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.69, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Flowers' median patient age at 61, with 49% women.
Dr. Flowers' Medicare patients by age, 2024
Dr. Flowers' Medicare patients by sex, 2024
- Women29462%
- Men17838%
Chronic conditions among Dr. Flowers' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Mood disorders46%
- Anxiety42%
- Depression42%
- Ischemic heart disease38%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Flowers' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John L. Flowers wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Flowers wrote 12 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $222 in total drug cost. In 2016, CMS named 27 claims across 2 drugs.
Dr. Flowers' most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2020
- 2016
- 2020
- Claims for drugs CMS names
- 2016: 272020: 1737%
Drugs named by CMS: 1 in 2020, 2 in 2016.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. John L. Flowers takes part in Medicare
Dr. Flowers accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John L. Flowers received $8,026 in industry payments from 2016 to 2023
CMS Open Payments shows 17 general payments to Dr. Flowers from 7 drug and device companies from 2016 to 2023. Consulting fees make up the largest share, 75% of the total. Molnlycke Health Care US, LLC paid the most, $7,395.
General payments to Dr. Flowers by program year, 2016 to 2023
General payments to Dr. Flowers by kind, 2016 to 2023
- Consulting fees$6,00075%
- Travel and lodging$1,36017%
- Food and beverage$6668%
Companies that paid Dr. Flowers the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John L. Flowers graduated from Hahnemann University College of Medicine
Dr. Flowers graduated from Hahnemann University College of Medicine in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John L. Flowers's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John L. Flowers
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John L. Flowers' NPI number?
Dr. John L. Flowers' NPI number is 1891735965. It was assigned on June 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John L. Flowers?
Dr. John L. Flowers is a general surgeon in Towson, Maryland. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John L. Flowers practice?
Dr. Flowers practices at 6701 North Charles Street, Baltimore, MD 21204. Dr. Flowers' primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. Dmand AI also links Dr. Flowers to 1 group practice or clinic and 1 medical group.
What is Dr. John L. Flowers' office phone number?
The practice phone on file for Dr. Flowers is (443) 849-2000.
What is Dr. John L. Flowers' medical license number?
Dr. Flowers holds Maryland license D40524.
Which hospitals is Dr. John L. Flowers affiliated with?
Dr. Flowers practices at Greater Baltimore Medical Center in Baltimore, Maryland.
What medical group is Dr. John L. Flowers part of?
Dr. Flowers is linked to Greater Baltimore Medical Center (GBMC). Dmand AI links Dr. Flowers to 1 more medical group.
Does Dr. John L. Flowers accept Medicare?
Yes. CMS data shows Dr. Flowers billed Medicare for 716 services in 2024, and Dr. Flowers accepts Medicare assignment.
How many Medicare patients does Dr. John L. Flowers see?
CMS counts 472 Medicare patients who saw Dr. Flowers in 2024, with an average age of 77.
What services does Dr. John L. Flowers bill to Medicare?
In 2024, Dr. Flowers' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and hospital inpatient care (99239).
Show 4 more questionsShow fewer questions
Where did Dr. John L. Flowers go to medical school?
Dr. Flowers graduated from Hahnemann University College of Medicine in 1984.
What drugs does Dr. John L. Flowers prescribe most?
In 2020 Medicare Part D data, Dr. Flowers' most prescribed drugs by claims were Diphenoxylate-Atropine.
Has Dr. John L. Flowers received payments from drug or device companies?
CMS Open Payments shows $8,026 in general payments to Dr. Flowers from 7 companies from 2016 to 2023. The largest total came from Molnlycke Health Care US, LLC.
How long has Dr. John L. Flowers been practicing?
Dr. Flowers graduated from medical school in 1984, 42 years ago.
Selling to surgery practices?
See general surgeons in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card