DR. MARK M MOASSER (M.D.) – Medical Oncology Physician, NPI 1417911751
Medical Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
550 MEDICAL ONCOLOGY in CA
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Provider Addresses for DR. MARK M MOASSER (M.D.)
1635, Divisadero Street, Lower Pacific Heights, Western Addition, San Francisco, California, 94115, United States
STE. 625, BOX 1821
SAN FRANCISCO, CA 941430001
Phone:
Type: Mailing
UCSF Mount Zion Campus, 1600, Divisadero Street, Western Addition, San Francisco, California, 94115, United States
2ND FLOOR, BOX 1710
SAN FRANCISCO, CA 941153010
Phone: (415) 353-7070
Fax: (415) 353-7021
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2004-06-18
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 |
|---|---|---|---|---|
| I20040618000450 | I | Medical 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 113 | 21 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 78 | 49 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 16 | 16 | $0 |
Insurance plans in this area (ZIP 94143)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | CA | |
| Hospitalist, Internal Medicine | CA | |
| - | CA | |
| - | CA | |
| Physician Assistant | CA | |
| - | CA | |
| - | ID | |
| Diagnostic Radiology | CA | |
| - | MD | |
| Orthopedic Surgery | CA |
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