WEIMING RYAN YAN M.D.
NPI 1851552624
Internal Medicine - Gastroenterology in Frederick, MD
About Weiming Ryan Yan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WEIMING RYAN YAN M.D. (NPI 1851552624) is an individual gastroenterology provider in Frederick, Maryland, licensed in Maryland (D0072237) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Meritus Medical Center, and maintains a secondary practice location in Randallstown.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Weiming Ryan Yan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Weiming Yan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Frederick, MD 21704
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 10 clinicians in this Medicare group
Gaithersburg, MD 20877
- Reassigned Medicare billing, District of Columbia enrollment
- 20 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Meritus Medical Center
Acute Care Hospitals · Hagerstown, MDFrederick Health Hospital
Acute Care Hospitals · Frederick, MDHoly Cross Germantown Hospital
Acute Care Hospitals · Germantown, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21704 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FREDERICK, MD 21704
FREDERICK, MD 21704
FREDERICK, MD 21704
FREDERICK, MD 21704
FREDERICK, MD 21704
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Weiming Yan's NPI number?
The NPI number for Weiming Yan is 1851552624. It was assigned to this individual provider in the NPPES registry on June 24, 2008.
Where is Weiming Yan located?
Weiming Yan practices at 7109 Guilford Dr Ste 300, Frederick, MD 21704. The listed phone number is (301) 695-6800.
What is Weiming Yan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Weiming Yan enrolled in Medicare?
Yes. Weiming Yan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Weiming Yan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Weiming Yan reassigns Medicare benefits to 2 organizations: Frederick Gastroenterology Associates PA (Frederick, MD) and Chinese Culture And Community Service Center, Inc. (Gaithersburg, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Weiming Yan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Weiming Yan affiliated with any hospitals?
According to CMS data, Weiming Yan is affiliated with Meritus Medical Center, Frederick Health Hospital and Holy Cross Germantown Hospital.
When was this NPI record last updated?
The NPPES record for Weiming Yan was last updated on November 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Weiming Ryan Yan, M.D. · NPI 1851552624
Gastroenterology physician in Frederick, Maryland. Individual provider, active in the CMS NPPES registry since June 24, 2008.
## Identity
- **NPI:** 1851552624 (Entity type: Individual)
- **Enumerated:** June 24, 2008
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** D0072237 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 7109 GUILFORD DR STE 300, Frederick, MD 21704-5179
- **Phone:** (301) 695-6800 · **Fax:** (301) 695-6891
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Frederick Gastroenterology Associates PA (NPI 1962508887, Frederick, MD); Chinese Culture And Community Service Center, Inc. (NPI 1891328563, Gaithersburg, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2008
## Record status
- **NPPES last updated:** November 7, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1851552624) · Data from the CMS NPPES public registry.