DR. WARREN MARC ROSS (M.D.) – Internal Medicine Physician, NPI 1770568891
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
5,262 INTERNAL MEDICINE in MD
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Provider Addresses for DR. WARREN MARC ROSS (M.D.)
Crossroads Professional Center, 4801, Dorsey Hall Drive, Dorsey's Search, Ellicott City, Howard County, Maryland, 21042, United States
SUITE 201
ELLICOTT CITY, MD 210427766
Phone: (410) 997-5191
Fax: (410) 997-7957
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 91 Open Payments records for all available years, with a total value of $2,126.
Total Amount is formed as General ($2,126) + Research ($0) + Ownership ($0) = $2,126.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($167).
Total Amount
$2,126
General + Research + Ownership
Payments
91
Total payment records
General Amount
$2,126
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $167 |
| Amgen Inc. | $164 |
| Lilly USA, LLC | $142 |
| HARMONY BIOSCIENCES LLC | $131 |
| Novo Nordisk Inc | $117 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-03-01
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100301000329 | I | Internal Medicine | MD | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,622 | 715 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 1,275 | 641 | $0 |
| 80053 | Blood test, comprehensive group of blood chemicals | 1,179 | 629 | $0 |
| 86140 | Measurement c-reactive protein for detection of infection or inflammation | 1,131 | 611 | $0 |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 1,122 | 616 | $0 |
Insurance plans in this area (ZIP 21042)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | MD | |
| Family Practice | MD | |
| Family Practice | CA | |
| - | MD | |
| Internal Medicine | MD | |
| Family Practice | PA | |
| Internal Medicine | PA | |
| Nurse Practitioner | MD | |
| - | MD | |
| Internal Medicine | MD |
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