Stephen Jay Katz, MD
Internal Medicine Physician · Severna Park, MD
Stephen Jay Katz, MD is an internal medicine physician with a practice address in Severna Park, Maryland, and NPI 1255486775, issued on Jan 24, 2007. Check the license (Maryland D38687, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Stephen Jay Katz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D38687 MD
Self-reported in NPPES; status is on the state search - Practice location
- 31 Robinson RD, Severna Park, MD 21146
- Phone
- (410) 544-5900
- Enumerated
- Jan 24, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 544-5939
- Medicare enrollment
- Enrolled (PECOS I20110701000163); may accept Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 31 Robinson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Donald Orso, PHDPsychologist1396805636
Verify Stephen Jay Katz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D38687Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average internal medicine physician in 2024
3,154 Medicare Part D claims for 253 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 89 claims were for opioids.
Most prescribed
- Levothyroxine Sodium133 claims
- Rosuvastatin Calcium132 claims
- Amlodipine Besylate123 claims
- Prednisone100 claims
- Atorvastatin Calcium87 claims
- Lorazepam85 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.
The MIPS final score for 2023 (Medicare payment program): 19.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Sinai Hospital OF Baltimore, IncBaltimore, MD
- Stephen Katz MD PASeverna Park, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Jay Katz among 3,904 internal medicine physician records in Maryland
Stephen Jay Katz, MD 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 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 44% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1988 · median 2003 among the 2,445 with a school on file
- 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).
11 internal medicine physician records list a practice address in Severna Park
They are 11 of the 701 NPPES records with a practice address in Severna Park, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Severna Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marsha Blakeslee, M.D., D.O.Severna Park, MD 211461902925639
- Mollie Davis, MDSeverna Park, MD 211461033264270
- Holly Eyler-Yeatman, M.D.Severna Park, MD 211461790834299
- Sandra Leni, MD MSSeverna Park, MD 211461760490270
- Danielle McDevitt, MDSeverna Park, MD 211461336567361
- Sharon Messics, M.D.Severna Park, MD 211461619993474
- Ellegant Pearson, MDSeverna Park, MD 211461437418274
- Eugenia Robertson, M.D.Severna Park, MD 211461962473330
Common questions
What is Stephen Jay Katz, MD's NPI number?
Stephen Jay Katz, MD's National Provider Identifier (NPI) is 1255486775, issued on Jan 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Jay Katz, MD located?
The NPPES record lists a practice address at 31 Robinson RD, Severna Park, MD, 21146. Phone: (410) 544-5900. Providers update this record themselves, so call before visiting.
How can I verify Stephen Jay Katz, MD's license?
NPPES lists Maryland license number D38687, 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 Stephen Jay Katz, MD prescribe under Medicare Part D?
In 2024, Stephen Jay Katz, MD had 3,154 Medicare Part D claims for 253 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Stephen Jay Katz, MD's MIPS final score?
The 2023 MIPS final score is 19.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.