DR. RYAN J SULLIVAN (MD) – Internal Medicine Physician, NPI 1881696003
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
606 HEMATOLOGY/ONCOLOGY in MA
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Provider Addresses for DR. RYAN J SULLIVAN (MD)
Mount Auburn Hospital, 330, Mount Auburn Street, Coolidge Hill, Cambridge, Middlesex County, Massachusetts, 02138, United States
CAMBRIDGE, MA 021385502
Phone: (617) 499-5112
Fax: (617) 575-8608
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 16 Open Payments records for all available years, with a total value of $22,734.
Total Amount is formed as General ($14,349) + Research ($8,385) + Ownership ($0) = $22,734.
Last reported payment date: 2024-11-18 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($10,832).
Total Amount
$22,734
General + Research + Ownership
Payments
16
Total payment records
General Amount
$14,349
General payments
Research Amount
$8,385
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $10,832 |
| Novartis Pharmaceuticals Corporation | $6,455 |
| Merck Sharp & Dohme LLC | $3,461 |
| PFIZER INC. | $1,930 |
| ModernaTX, Inc. | $56 |
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: 2005-02-10
PECOS data refreshed: 2026-05-27
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 |
|---|---|---|---|---|
| I20050210000189 | I | Hematology/Oncology | MA | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 280 | 115 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 154 | 107 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 45 | 13 | $0 |
Insurance plans in this area (ZIP 02138)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | MA | |
| Internal Medicine | MA | |
| - | MA | |
| - | MA | |
| Anesthesiology, Pain Management | MA | |
| - | MA | |
| Clinical Psychologist | MA | |
| Internal Medicine | MA | |
| Internal Medicine | MA | |
| - | MA |
Reviews
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