Walter B. Koppel, M.D.
Internal Medicine Physician · Towson, MD
Walter B. Koppel, M.D. is an internal medicine physician with a practice address in Towson, Maryland, and NPI 1699847053, issued on Nov 14, 2006. Check the license (Maryland D15538, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Walter B. Koppel
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D15538 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8501 Lasalle RD, Towson, MD 21286
- Phone
- (443) 279-0330
- Enumerated
- Nov 14, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (443) 279-0334
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 8501 Lasalle RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Walter B. Koppel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D15538Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
52 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of 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.
Walter B. Koppel among 3,904 internal medicine physician records in Maryland
Walter B. Koppel, M.D. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 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).
121 internal medicine physician records list a practice address in Towson
They are 121 of the 3,721 NPPES records with a practice address in Towson, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Towson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Albert Deloskey, M.D.Towson, MD 212861891750493
- Howard Friedman, MDTowson, MD 212861447237508
- Carl Friedman, M.D.Towson, MD 212861619932787
- Alice Hsieh, D.O.Towson, MD 212861023079167
- Sabyasachi Kar, M.D.Towson, MD 212861669553798
- Francis Khoo, M.D.Towson, MD 212861518908987
- Suderhan Najar, M.D.Towson, MD 212861457436529
- Giog Sing Po, M.D.Towson, MD 212861831286368
Common questions
What is Walter B. Koppel, M.D.'s NPI number?
Walter B. Koppel, M.D.'s National Provider Identifier (NPI) is 1699847053, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter B. Koppel, M.D. located?
The NPPES record lists a practice address at 8501 Lasalle RD, Towson, MD, 21286. Phone: (443) 279-0330. Providers update this record themselves, so call before visiting.
How can I verify Walter B. Koppel, M.D.'s license?
NPPES lists Maryland license number D15538, 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 Walter B. Koppel, M.D. prescribe under Medicare Part D?
In 2024, Walter B. Koppel, M.D. had 52 Medicare Part D claims; 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.