Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Justin Hahn, DO

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1609404458

Justin Hahn, DO practises Internal Medicine in Rockville, Maryland. Graduated from Nova Southeastern College of Osteo Medicine in 2020, 6 years ago. Practices with Johns Hopkins Community Physicians, Inc, a 765-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
6
Trained at
Nova Southeastern College of Osteo Medicine
Licensed in
MD
In the registry since
2020
Specialties on file
2
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.

See every abbreviation used in this directory →

Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Rockville, MD

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence H96299 (MD)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1609404458
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 28, 2020
Last updated in NPPESFebruary 2, 2024
Certification dateFebruary 2, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolNOVA SOUTHEASTERN COLLEGE OF OSTEO MEDICINE
Graduated 2020 (6 years in practice)
Group practice Johns Hopkins Community Physicians, Inc — 765 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients459
Services billed 1,437 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Johns Hopkins Community Physicians, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 765 clinicians in the practice; 12 are shown here.

Other providers in Rockville