HUIMIN GUO MD
NPI 1184858516
Pathology - Anatomic Pathology & Clinical Pathology in Gaithersburg, MD
About Huimin Guo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HUIMIN GUO MD (NPI 1184858516) is an individual anatomic pathology & clinical pathology provider in Gaithersburg, Maryland, licensed in Maryland (D0079643) and active in the NPI registry since May 2009. She is enrolled in Medicare PECOS, is affiliated with Inova Alexandria Hospital, and is a graduate of Other (1991).
NPPES Registry Identity
Specialties & Licenses 2
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
Huimin Guo Md 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 Huimin Guo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Gaithersburg, MD 20879
- Reassigned Medicare billing, District of Columbia enrollment
- Medicare enrollment name: Carla B Macleod MD & Associates LLC
- 5 clinicians in this Medicare group
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- 57 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
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Inova Alexandria Hospital
Acute Care Hospitals · Alexandria, VAInova Loudoun Hospital
Acute Care Hospitals · Leesburg, VAInova Fairfax Hospital
Acute Care Hospitals · Falls Church, VAInova Fair Oaks Hospital
Acute Care Hospitals · Fairfax, VAInova Mount Vernon Hospital
Acute Care Hospitals · Alexandria, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20879 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GAITHERSBURG, MD 20879
GAITHERSBURG, MD 20879
GAITHERSBURG, MD 20879
GAITHERSBURG, MD 20879
GAITHERSBURG, MD 20879
GAITHERSBURG, MD 20879
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 Huimin Guo's NPI number?
The NPI number for Huimin Guo is 1184858516. It was assigned to this individual provider in the NPPES registry on May 13, 2009.
Where is Huimin Guo located?
Huimin Guo practices at 18207A Flower Hill Way, Gaithersburg, MD 20879. The listed phone number is (301) 926-4707.
What is Huimin Guo's specialty?
The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.
Is Huimin Guo enrolled in Medicare?
Yes. Huimin Guo 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 Huimin Guo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Huimin Guo reassigns Medicare benefits to 2 organizations: Carla B. Macleod M.D. & Associates LLC (Gaithersburg, MD) and Inova Health Care Services - Pathology (Falls Church, VA). 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 Huimin Guo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Huimin Guo affiliated with any hospitals?
According to CMS data, Huimin Guo is affiliated with Inova Alexandria Hospital, Inova Loudoun Hospital, Inova Fairfax Hospital, Inova Fair Oaks Hospital and Inova Mount Vernon Hospital.
When was this NPI record last updated?
The NPPES record for Huimin Guo was last updated on August 13, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Huimin Guo, MD · NPI 1184858516
Anatomic Pathology & Clinical Pathology physician in Gaithersburg, Maryland. Individual provider, active in the CMS NPPES registry since May 13, 2009.
## Identity
- **NPI:** 1184858516 (Entity type: Individual)
- **Enumerated:** May 13, 2009
- **Primary specialty:** Pathology - Anatomic Pathology & Clinical Pathology · taxonomy 207ZP0102X
- **State license:** D0079643 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 18207A FLOWER HILL WAY, Gaithersburg, MD 20879-5331
- **Phone:** (301) 926-4707 · **Fax:** (301) 926-4708
## 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): Carla B. Macleod M.D. & Associates LLC (NPI 1013176957, Gaithersburg, MD); Inova Health Care Services - Pathology (NPI 1427369578, Falls Church, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1991
## Record status
- **NPPES last updated:** August 13, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1184858516) · Data from the CMS NPPES public registry.