Dr. Steven Diener M.D.
About this NPIWhat this record shows.
NPI 1558362111 is registered to Dr. Steven Diener M.D., a Internal Medicine practising at 5900 Waterloo Rd Ste 200 in Columbia, Maryland. Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties. Dr. Steven Diener M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2005.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- 398142-01MD· Issued by CAREFIRST MD RENDERING
- 4087647MD· Issued by AETNA FEE FOR SERVICE
- P12727MD· Issued by CAREFIRST MPOS
- 066221MD· Issued by AETNA CAPITATED
- 1333045MD· Issued by CIGNA PIN
- 110140700MD· Issued by RR MEDICARE
- 243354MD· Issued by MAMSI SPECIALIST
- 14480MD· Issued by JHHC PROVIDER NUMBER
- 843354MD· Issued by MAMSI PRIMARY CARE
- 3509-0002MD· Issued by CAREFIRST BLUECHOICE
Medicaid
Source: NPPES public registry.
Medicare enrollment
This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20100630000444Internal MedicineMD
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. Steven Diener M.D. accepts. To confirm in-network status with your specific health plan, contact Dr. Steven Diener M.D. directly at (410) 740-2900.
Frequently asked
Yes. NPI 1558362111 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (410) 740-2900.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. Steven Diener M.D. is a Type-1 individual NPI.