Andrew Walters Maier, MD
Internal Medicine Physician · Philadelphia, PA
Andrew Walters Maier, MD is an internal medicine physician with a practice address in Philadelphia, Pennsylvania, and NPI 1376787846, issued on Apr 28, 2009. Check the license (Pennsylvania MD443635, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Andrew Walters Maier
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD443635 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3701 Market Street, Philadelphia, PA 19104
- Phone
- (215) 662-2250
- Enumerated
- Apr 28, 2009
- Record last updated
- Dec 20, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (215) 615-3995
- Medicare enrollment
- Enrolled (PECOS I20120710000626); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 3701 Market Street
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Verify Andrew Walters Maier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD443635Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,792 Medicare Part D claims for 696 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 296 claims were for opioids.
Most prescribed
- Atorvastatin Calcium436 claims
- Amlodipine Besylate334 claims
- Gabapentin199 claims
- Rosuvastatin Calcium189 claims
- Albuterol Sulfate Hfa174 claims
- Omeprazole161 claims
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
- Trustees OF The University OF PennsylvaniaPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Walters Maier among 7,300 internal medicine physician records in Pennsylvania
Andrew Walters Maier, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 47% of them.
- NPI issued2009 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2009 · median 2008 among the 4,208 with a school on file
- Record last updated2017 · 56% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,855 internal medicine physician records list a practice address in Philadelphia
They are 1,855 of the 42,849 NPPES records with a practice address in Philadelphia, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Philadelphia → Internal Medicine Physician nationwide →
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- William Gilhool, DOPhiladelphia, PA 191041982606919
- Bruce Kinosian, MDPhiladelphia, PA 191041871536177
Common questions
What is Andrew Walters Maier, MD's NPI number?
Andrew Walters Maier, MD's National Provider Identifier (NPI) is 1376787846, issued on Apr 28, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Walters Maier, MD located?
The NPPES record lists a practice address at 3701 Market Street, Philadelphia, PA, 19104. Phone: (215) 662-2250. Providers update this record themselves, so call before visiting.
How can I verify Andrew Walters Maier, MD's license?
NPPES lists Pennsylvania license number MD443635, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Andrew Walters Maier, MD prescribe under Medicare Part D?
In 2024, Andrew Walters Maier, MD had 6,792 Medicare Part D claims for 696 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.