Physician Profile
Unclaimed ProfileAbout YAN
Based in Frederick, MD, Weiming Ryan Yan, M.D. is listed in the NPI registry under gastroenterology. Weiming graduated from Ohio State University College of Medicine in 2008. Weiming is also listed as specializing in internal medicine. According to Medicare claims data, Weiming cared for 577 Medicare patients across 666 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Yan's specialty?
Dr. Yan is a gastroenterology in Frederick, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where can I find Dr. Yan?
Dr. Yan is listed at 7109 GUILFORD DR STE 300, Frederick, MD 21704. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Yan?
The number on file is (301) 695-6800. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Yan's NPI number?
Dr. Yan's National Provider Identifier is 1851552624. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Yan's medical education?
Dr. Yan attended Ohio State University College of Medicine, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Yan been practicing?
Dr. Yan has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Yan known for?
According to Medicare billing data, Dr. Yan performs procedures including biopsy of large bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Yan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Yan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (301) 695-6800
- Email not available
Practice Locations
7109 GUILFORD DR STE 300
Frederick, MD 21704
Procedures Most Often Billed to Medicare
666 services · 577 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
116 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
99 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
78 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
223 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
107 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
43 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 7
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in Frederick 4
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Ohio State University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2008 at Ohio State University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of large bowel using a flexible endoscope 8
Providers in MD who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.