ANDREW HAMILTON WARNER DO
NPI 1275112070
Internal Medicine in Parkville, MD
About Andrew Hamilton Warner Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANDREW HAMILTON WARNER DO (NPI 1275112070) is an individual internal medicine provider in Parkville, Maryland, licensed in Maryland (H0103152) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS and is a graduate of Marian University College Of Osteopathic Medicine (2021).
NPPES Registry Identity
Specialties & Licenses
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
Andrew Hamilton Warner Do 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 Reassignment
Medicare enrollment records show Andrew Warner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baltimore, MD 21234
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Maryland Medical First PA
- 77 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21234 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 18
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Andrew Warner's NPI number?
The NPI number for Andrew Warner is 1275112070. It was assigned to this individual provider in the NPPES registry on April 7, 2021.
Where is Andrew Warner located?
Andrew Warner practices at 8901 Clement Ave, Parkville, MD 21234. The listed phone number is (410) 661-4670.
What is Andrew Warner's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Andrew Warner enrolled in Medicare?
Yes. Andrew Warner 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 organization bills Medicare for Andrew Warner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Warner reassigns Medicare benefits to Maryland Medical First P.A. (Baltimore, MD). The 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 Andrew Warner'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 Andrew Warner was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.
# Andrew Hamilton Warner, DO · NPI 1275112070
Internal Medicine physician in Parkville, Maryland. Individual provider, active in the CMS NPPES registry since April 7, 2021.
## Identity
- **NPI:** 1275112070 (Entity type: Individual)
- **Enumerated:** April 7, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** H0103152 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 8901 CLEMENT AVE, Parkville, MD 21234-2603
- **Phone:** (410) 661-4670 · **Fax:** (410) 661-4671
## 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:** Maryland Medical First P.A. (NPI 1013005016, Baltimore, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Marian University College Of Osteopathic Medicine, class of 2021
## Record status
- **NPPES last updated:** February 5, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1275112070) · Data from the CMS NPPES public registry.