DR. PHILIP L CHATHAM (M.D.) – Medical Oncology Physician, NPI 1740279264
Medical Oncology Physician
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Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. PHILIP L CHATHAM (M.D.)
15031 RINALDI ST STE 150
MISSION HILLS, CA 913451207
Phone: (818) 660-4700
Type: Location
Box, Lago del Salado, Los Angeles, San Nicolás de los Garza, Nuevo León, 66477, Mexico
LOS ANGELES, CA 900510185
Phone: (626) 775-3514
Type: Mailing
19742 TRAMMELL LN
CHATSWORTH, CA 913111906
Phone: (818) 470-6809
Type: Mailing
207 S SANTA ANITA ST STE P05
SAN GABRIEL, CA 917761159
Phone: (626) 652-7433
Type: Location
16801 Devonshire St
Granada Hills, CA 913447405
Phone: (818) 366-1878
Fax: (818) 360-7850
Type: Location
15031 Rinaldi St Ste 150
Mission Hills, CA 913451207
Phone: (818) 660-4700
Type: Location
18000 STUDEBAKER RD STE 800
CERRITOS, CA 907032671
Phone: (562) 735-3226
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 20 Open Payments records for all available years, with a total value of $763.
Total Amount is formed as General ($763) + Research ($0) + Ownership ($0) = $763.
Last reported payment date: 2023-09-20 • Largest payer in this snapshot: Novartis Pharmaceuticals Corporation ($335).
Total Amount
$763
General + Research + Ownership
Payments
20
Total payment records
General Amount
$763
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-09-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novartis Pharmaceuticals Corporation | $335 |
| Incyte Corporation | $113 |
| E.R. Squibb & Sons, L.L.C. | $81 |
| Seagen Inc. | $51 |
| Amgen Inc. | $47 |
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: 2011-08-03
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 |
|---|---|---|---|---|
| I20110803000887 | I | Hematology/Oncology | CA | 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 | 16 | 15 | $0 |
Insurance plans in this area (ZIP 91345)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | CA | 96367 | Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour | 154 | 26 |
| HEMATOLOGY/ONCOLOGY | CA | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 435 | 32 |
| HEMATOLOGY/ONCOLOGY | CA | 96415 | Infusion of chemotherapy into a vein | 308 | 28 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| Nurse Practitioner | CA | |
| Cardiovascular Disease (Cardiology) | CA | |
| Hematology/Oncology, Internal Medicine | CA | |
| - | CA | |
| Nurse Practitioner | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| Endocrinology, Internal Medicine | CA | |
| General Surgery | CA | |
| Certified Registered Nurse Anesthetist (Crna) | PA |
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