Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John Flaks, DO

Individual provider Anesthesiology Physician · NPI 1366424939

John Flaks, DO is an Anesthesiology in Baltimore, Maryland. Graduated from Philadelphia College of Osteopathic Medicine in 2000, 26 years ago. Practices with Columbia Outpatient Sedation LLC, a 28-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
26
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
MD
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3001 S Hanover St
Baltimore, MD 21225-1233
Phone: (410) 350-3341
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence H0059599 (MD)

Record details

NPI number1366424939
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedNovember 18, 2005
Last updated in NPPESOctober 17, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2000 (26 years in practice)
Group practice Columbia Outpatient Sedation Llc — 28 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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