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

Dr. Anna Ahn, MD

Individual provider Internal Medicine Physician · NPI 1700105533

Dr. Anna Ahn, MD is registered under Pulmonary Disease in Stony Brook, New York. Graduated from New York Medical College in 2003, 23 years ago. Practices with University of Maryland Community Medical Group Inc, a 450-clinician group and accepts Medicare assignment. Licensed in Maryland and New York.

Years since qualifying
23
Trained at
New York Medical College
Licensed in
MD, NY
In the registry since
2010
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Medical Staff Ofc T9 Stony Brook University Hospital
Stony Brook, NY 11794
Phone: (631) 444-2754
Fax: (631) 444-6031
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D75970 (MD)
Internal Medicine Physician Taxonomy 207R00000X · Licence 249976 (NY)

Record details

NPI number1700105533
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 18, 2010
Last updated in NPPESAugust 12, 2018

Medicare enrollment

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

Medicare specialtyPULMONARY DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 2003 (23 years in practice)
Group practice University Of Maryland Community Medical Group Inc — 450 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 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 patients657
Services billed 1,598 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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $560 35 payments · a meal or drink at a meeting or visit, not a fee
Education $100 1 payment · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • University Of Md Shore Medical Center At Easton Hospital · Easton, MD
  • University Of Md Shore Medical Ctr At Chestertown Hospital · Chestertown, MD

Colleagues at University of Maryland Community Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 450 clinicians in the practice; 12 are shown here.

Other providers in Stony Brook