DR. AARON MICHAEL GERSTENMAIER M.D.
NPI 1851602767
Family Medicine in Colmar Manor, MD
About Dr. Aaron Michael Gerstenmaier M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AARON MICHAEL GERSTENMAIER M.D. (NPI 1851602767) is an individual family medicine provider in Colmar Manor, Maryland, licensed in District Of Columbia (MD041031) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS and is a graduate of Ohio State University College Of Medicine (2010).
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
Dr. Aaron Michael Gerstenmaier 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
3Medicare enrollment records show Aaron Gerstenmaier reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20018
- Reassigned Medicare billing, District of Columbia enrollment
- 79 clinicians in this Medicare group
Wheaton, MD 20902
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 309 clinicians in this Medicare group
Alexandria, VA 22310
- Reassigned Medicare billing, District of Columbia enrollment
- 6 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20722 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
COLMAR MANOR, MD 20722
COLMAR MANOR, MD 20722
COLMAR MANOR, MD 20722
COLMAR MANOR, MD 20722
COLMAR MANOR, MD 20722
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 Aaron Gerstenmaier's NPI number?
The NPI number for Aaron Gerstenmaier is 1851602767. It was assigned to this individual provider in the NPPES registry on June 24, 2010.
Where is Aaron Gerstenmaier located?
Aaron Gerstenmaier practices at 4151 Bladensburg Rd, Colmar Manor, MD 20722. The listed phone number is (301) 699-7707.
What is Aaron Gerstenmaier's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Aaron Gerstenmaier enrolled in Medicare?
Yes. Aaron Gerstenmaier 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 Aaron Gerstenmaier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Gerstenmaier reassigns Medicare benefits to 3 organizations: Community Of Hope Inc. (Washington, DC), Medstar Urgent Care, LLC (Wheaton, MD) and Optimum Health LLC (Alexandria, 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 Aaron Gerstenmaier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Aaron Gerstenmaier was last updated on September 13, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Aaron Michael Gerstenmaier, M.D. · NPI 1851602767
Family Medicine physician in Colmar Manor, Maryland. Individual provider, active in the CMS NPPES registry since June 24, 2010.
## Identity
- **NPI:** 1851602767 (Entity type: Individual)
- **Enumerated:** June 24, 2010
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD041031 (District of Columbia)
- **Sole proprietor:** No
## Practice location
- **Address:** 4151 BLADENSBURG RD, Colmar Manor, MD 20722-1928
- **Phone:** (301) 699-7707
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Community Of Hope Inc. (NPI 1487931465, Washington, DC); Medstar Urgent Care, LLC (NPI 1871843409, Wheaton, MD); Optimum Health LLC (NPI 1417723545, Alexandria, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2010
## Record status
- **NPPES last updated:** September 13, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1851602767) · Data from the CMS NPPES public registry.