Ian K. Slepian, M.D.
Internal Medicine Physician · Pasadena, MD
Ian K. Slepian, M.D. is an internal medicine physician with a practice address in Pasadena, Maryland, and NPI 1073679064, issued on Dec 28, 2006. Check the license (Maryland D0033231, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Ian K. Slepian
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0033231 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8028 Ritchie Hwy Ste 134, Pasadena, MD 21122
- Phone
- (410) 553-2400
- Enumerated
- Dec 28, 2006
- Record last updated
- Dec 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 8028 Ritchie Hwy Ste 134
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alicia Sussman, M.D.Obstetrics & Gynecology Physician1427273739
Verify Ian K. Slepian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0033231Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
25 Medicare Part D claims for 25 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
- Adacel Tdap25 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.
Ian K. Slepian among 3,904 internal medicine physician records in Maryland
Ian K. Slepian, 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 updated2012 · 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).
18 internal medicine physician records list a practice address in Pasadena
They are 18 of the 537 NPPES records with a practice address in Pasadena, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Atkinson, MDPasadena, MD 211221386703734
- Chackmukal Cyriac, M.D.Pasadena, MD 211221033128574
- Christopher Deborja, M.D.Pasadena, MD 211221437163649
- Karin Dodge, MDPasadena, MD 211221124186028
- Michael Garahy, M.D.Pasadena, MD 211221396713186
- Pradeep Garg, M.D.Pasadena, MD 211221952376469
- Albin Kuhn, M.D.Pasadena, MD 211221760581656
- Surya Mundra, M.D.Pasadena, MD 211221295744712
Common questions
What is Ian K. Slepian, M.D.'s NPI number?
Ian K. Slepian, M.D.'s National Provider Identifier (NPI) is 1073679064, issued on Dec 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian K. Slepian, M.D. located?
The NPPES record lists a practice address at 8028 Ritchie Hwy Ste 134, Pasadena, MD, 21122. Phone: (410) 553-2400. Providers update this record themselves, so call before visiting.
How can I verify Ian K. Slepian, M.D.'s license?
NPPES lists Maryland license number D0033231, 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 Ian K. Slepian, M.D. prescribe under Medicare Part D?
In 2024, Ian K. Slepian, M.D. had 25 Medicare Part D claims for 25 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.