TIMOTHY A JOHNSON (M.D.) – Hematology & Oncology Physician, NPI 1801879762
Hematology & Oncology 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 TIMOTHY A JOHNSON (M.D.)
Mercy Medical Center, 271, Carew Street, North End, Springfield, Hampden County, Massachusetts, 01104, United States
SPRINGFIELD, MA 01104
Phone: (413) 748-7370
Fax: (413) 748-7221
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 1 Open Payments records for all available years, with a total value of $24.
Total Amount is formed as General ($24) + Research ($0) + Ownership ($0) = $24.
Last reported payment date: 2023-05-19 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($24).
Total Amount
$24
General + Research + Ownership
Payments
1
Total payment records
General Amount
$24
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $24 |
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: 2004-06-29
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 |
|---|---|---|---|---|
| I20040629001174 | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 413 | 146 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 391 | 254 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 217 | 63 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 62 | 62 | $0 |
| 99443 | Telephone medical discussion with physician, 21-30 minutes | 22 | 12 | $0 |
Insurance plans in this area (ZIP 01104)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | MA | |
| N E U R O L O G Y | CT | |
| H E M A T O L O G Y/ O N C O L O G Y | MA | |
| - | MA | |
| - | MA | |
| Physician Assistant | MA | |
| Medical Oncology | MA | |
| Nurse Practitioner | MA | |
| - | MA | |
| Nurse Practitioner | MA |
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