Quick answers
- Where does John B. Flaks see patients?
- Medicare's clinician data lists 3 practice locations, including Annapolis, MD, Olney, MD and Columbia, MD. Call before your visit to confirm the address.
- What is John B. Flaks's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does John B. Flaks accept Medicare assignment?
- Yes. Medicare's clinician data says John B. Flaks accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John B. Flaks?
- (410) 290-6677, as listed in official Medicare / NPI Registry data.
- What is John B. Flaks's NPI number?
- 1366424939. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John B. Flaks is enrolled with Medicare (CMS data updated 2026-10-02).
- 1419 Forest Dr, Suite 105Annapolis, MD 21403 (410) 290‑6677
- 3407 Olandwood Ct, Unit 103Olney, MD 20832 (301) 570‑8671
- 7120 Minstrel Way, Suite 100Columbia, MD 21045 (410) 290‑6677
Group practices
Medicare enrollment lists John B. Flaks as a member of this group (CMS data updated 2026-10-02).
- Columbia Outpatient Sedation LLC30 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Annapolis
Clinicians with the same Medicare primary specialty in Annapolis, MD — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366424939 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians