Andrew Hamilton Warner, DO
Internal Medicine Physician · Parkville, MD
Andrew Hamilton Warner, DO is an internal medicine physician with a practice address in Parkville, Maryland, and NPI 1275112070, issued on Apr 7, 2021. Check the license (Maryland H0103152, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Andrew Hamilton Warner
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- H0103152 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8901 Clement Ave, Parkville, MD 21234
- Phone
- (410) 661-4670
- Enumerated
- Apr 7, 2021
- Record last updated
- Feb 5, 2026
- Fax
- (410) 661-4671
- Medicare enrollment
- Enrolled (PECOS I20260318000386); accepts Medicare assignment
- Medical or professional school
- Marian University College Of Osteopathic Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 8901 Clement Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Andrew Hamilton Warner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H0103152Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
143 Medicare Part D claims for 44 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Maryland Medical First PAParkville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Hamilton Warner among 3,904 internal medicine physician records in Maryland
Andrew Hamilton Warner, DO is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2003 among the 2,445 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 internal medicine physician records list a practice address in Parkville
They are 20 of the 399 NPPES records with a practice address in Parkville, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Parkville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Fausto Aquino, MDBaltimore, MD 212341265543375
- Panayiotis Baltatzis, M.D.Baltimore, MD 212341417983016
- Narender Bharaj, M.D.Parkville, MD 212341083682074
- Bhavneet Bharaj, M.D.Parkville, MD 212341689860157
- Karen GirgBaltimore, MD 212341427087626
- Ronald Jeffreys, D.O.Baltimore, MD 212341750347282
- Shalini Kamal, M.D.Baltimore, MD 212341316906985
- Serena Nolan, MDBaltimore, MD 212341336211739
Common questions
What is Andrew Hamilton Warner, DO's NPI number?
Andrew Hamilton Warner, DO's National Provider Identifier (NPI) is 1275112070, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Hamilton Warner, DO located?
The NPPES record lists a practice address at 8901 Clement Ave, Parkville, MD, 21234. Phone: (410) 661-4670. Providers update this record themselves, so call before visiting.
How can I verify Andrew Hamilton Warner, DO's license?
NPPES lists Maryland license number H0103152, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Andrew Hamilton Warner, DO prescribe under Medicare Part D?
In 2024, Andrew Hamilton Warner, DO had 143 Medicare Part D claims for 44 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.