Physician Profile
Unclaimed ProfileAbout FERRIS
Based in Silver Spring, MD, Warren Orrin Ferris, MD is listed in the NPI registry under rheumatology. Warren graduated from University of Missouri, Columbia School of Medicine in 1976. Warren is also listed as specialising in internal medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Ferris's specialty?
Dr. Ferris is a rheumatology in Silver Spring, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “RHEUMATOLOGY”.
NPI registry
Where can I find Dr. Ferris?
Dr. Ferris is listed at 3305 NORTH LEISURE WORLD BOULEVARD, Silver Spring, MD 20906. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Ferris?
The number on file is (301) 598-1554. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ferris's NPI number?
Dr. Ferris's National Provider Identifier is 1487744280. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Ferris's medical education?
Dr. Ferris attended University of Missouri, Columbia School of Medicine, graduating in 1976. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ferris been practising?
Dr. Ferris has 50 years experience. Calculated from a graduation year of 1976, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Ferris known for?
According to Medicare billing data, Dr. Ferris performs procedures including aspiration and/or injection of fluid from large joint, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ferris confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ferris. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (301) 598-1554
- Email not available
Practice Locations
3305 NORTH LEISURE WORLD BOULEVARD
Silver Spring, MD 20906
Procedures Most Often Billed to Medicare
2,831 services · 398 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
31 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
2,085 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
595 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
89 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
31 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other rheumatology specialists in Silver Spring 4
Same specialty, same city.
Trained at University of Missouri, Columbia School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1976 at University of Missouri, Columbia School of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in MD who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.