Dr. John B. Flaks, DO
- Medicare services, 2024
- 104
- Medicare patients, 2024
- 124
- Hospital affiliations
- 1
- Industry payments
- $417
- Medical groups
- 6
- Practice address
- 7120 Minstrel Way, Columbia, MD 21045
- Practice phone
- Call (410) 290-6677
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Whitemarsh Endoscopy Center
Columbia, Maryland
Find Dr. Flaks' 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 B. Flaks is an anesthesiologist in Columbia, Maryland
Dr. Flaks practices at Whitemarsh Endoscopy Center in Columbia, Maryland.
Dr. Flaks' NPI, 1366424939, was assigned on November 18, 2005. Dr. Flaks graduated from Philadelphia College of Osteopathic Medicine in 2000. Dr. Flaks holds Maryland license H0059599.
- NPI
- 1366424939NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8628054483
- NPI enumeration date
- November 18, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 290-6677
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John B. Flaks practices at Whitemarsh Endoscopy Center in Columbia, Maryland
Dr. Flaks' primary practice is Whitemarsh Endoscopy Center, at 7120 Minstrel Way, Columbia, MD 21045 in Howard County. The practice phone is (410) 290-6677.
- Whitemarsh Endoscopy Center7120 Minstrel Way, Columbia, MD 21045 · Howard CountyPhone(410) 290-6677
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John B. Flaks is affiliated with 4 sites of care and 6 medical groups
Dr. Flaks' primary practice is Whitemarsh Endoscopy Center in Columbia, Maryland. Dr. Flaks is also affiliated with MedStar Harbor Hospital. The medical group on file is MedStar Medical Group. Dmand AI also links Dr. Flaks to 5 more medical groups, 1 physician office and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John B. Flaks' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flaks practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Whitemarsh Endoscopy Center | Available with a free account |
| +3 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John B. Flaks is one of 965 anesthesiologists in Maryland
Anesthesiology is Dr. Flaks' primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Flaks is licensed in Maryland.
Specialties and state licenses
- Anesthesiology, MarylandPrimary
Anesthesiologists near Dr. Flaks
Counts of anesthesiologists 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 B. Flaks billed Medicare for 104 services in 2024
CMS data shows 104 Medicare services from Dr. Flaks across 7 procedure codes in 2024, for 124 Medicare patients. Medicare paid $10,150 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Flaks' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1082024: 6144%
- Surgery
- 2023: 642024: 4333%
Dr. Flaks compared with the Maryland median for anesthesiologists, 2024
- Dr. Flaks
- Maryland median
- Medicare services
- 104vs 101Close to median
- Medicare patients
- 124vs 17630% below
Medians across 918 anesthesiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Flaks' 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. Flaks?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Flaks and other anesthesiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John B. Flaks treated 124 Medicare patients in 2024, average age 71
CMS counts 124 Medicare patients who saw Dr. Flaks in 2024. The largest group is 65 to 74, with 80 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 9% are also on Medicaid. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Flaks' median patient age at 53, with 56% women.
Dr. Flaks' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Flaks' Medicare patients by sex, 2024
- Women7460%
- Men5040%
Chronic conditions among Dr. Flaks' Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis60%
- Anxiety26%
- Ischemic heart disease23%
- Mood disorders23%
- Depression21%
- Diabetes21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Flaks' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. John B. Flaks takes part in Medicare
Dr. Flaks accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John B. Flaks received $417 in industry payments from 2016 to 2025
CMS Open Payments shows 16 general payments to Dr. Flaks from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Halyard Health, Inc. paid the most, $146.
General payments to Dr. Flaks by program year, 2016 to 2025
Companies that paid Dr. Flaks the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John B. Flaks graduated from Philadelphia College of Osteopathic Medicine
Dr. Flaks graduated from Philadelphia College of Osteopathic Medicine in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John B. Flaks'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 B. Flaks
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 B. Flaks' NPI number?
Dr. John B. Flaks' NPI number is 1366424939. It was assigned on November 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John B. Flaks?
Dr. John B. Flaks is an anesthesiologist in Columbia, Maryland. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. John B. Flaks practice?
Dr. Flaks practices at 7120 Minstrel Way, Columbia, MD 21045. Dr. Flaks' primary practice is Whitemarsh Endoscopy Center in Columbia, Maryland. Dmand AI also links Dr. Flaks to 5 medical groups, 1 physician office and 1 group practice or clinic.
What is Dr. John B. Flaks' office phone number?
The practice phone on file for Dr. Flaks is (410) 290-6677.
What is Dr. John B. Flaks' medical license number?
Dr. Flaks holds Maryland license H0059599.
Which hospitals is Dr. John B. Flaks affiliated with?
Dr. Flaks is affiliated with MedStar Harbor Hospital.
What medical group is Dr. John B. Flaks part of?
Dr. Flaks is linked to MedStar Medical Group. Dmand AI links Dr. Flaks to 5 more medical groups.
Does Dr. John B. Flaks accept Medicare?
Yes. CMS data shows Dr. Flaks billed Medicare for 104 services in 2024, and Dr. Flaks accepts Medicare assignment.
How many Medicare patients does Dr. John B. Flaks see?
CMS counts 124 Medicare patients who saw Dr. Flaks in 2024, with an average age of 71.
What services does Dr. John B. Flaks bill to Medicare?
In 2024, Dr. Flaks' most billed Medicare services were anesthesia (01630), surgery: brain, spine and nerves (64447) and anesthesia (01480).
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Where did Dr. John B. Flaks go to medical school?
Dr. Flaks graduated from Philadelphia College of Osteopathic Medicine in 2000.
Has Dr. John B. Flaks received payments from drug or device companies?
CMS Open Payments shows $417 in general payments to Dr. Flaks from 13 companies from 2016 to 2025. The largest total came from Halyard Health, Inc.
How long has Dr. John B. Flaks been practicing?
Dr. Flaks graduated from medical school in 2000, 26 years ago.
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