DR. MARK L GELLER (M.D.) – Endocrinology, Diabetes & Metabolism Physician, NPI 1093710345
Endocrinology, Diabetes & Metabolism Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for DR. MARK L GELLER (M.D.)
PO BOX 9602
MISSION HILLS, CA 913469602
Phone: (818) 837-5559
Fax: (818) 792-4793
Type: Mailing
18133, Ventura Boulevard, Tarzana, Los Angeles, Los Angeles County, California, 91356, United States
SUITE 204
TARZANA, CA 913563641
Phone: (818) 466-7700
Fax: (818) 996-1649
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $40.
Total Amount is formed as General ($40) + Research ($0) + Ownership ($0) = $40.
Last reported payment date: 2023-12-19 • Largest payer in this snapshot: Abbott Laboratories ($24).
Total Amount
$40
General + Research + Ownership
Payments
2
Total payment records
General Amount
$40
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $24 |
| Dentsply Sirona Inc | $16 |
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: 2010-01-07
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 |
|---|---|---|---|---|
| I20100107000668 | I | Internal Medicine | 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 | 536 | 262 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 507 | 261 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 71 | 57 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 64 | 61 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 47 | 46 | $0 |
Insurance plans in this area (ZIP 91346)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| - | CA | |
| - | CA | |
| Gastroenterology, Internal Medicine | CA | |
| - | CA | |
| Family Practice | CA | |
| Family Practice | CA | |
| Physician Assistant | CA | |
| Family Practice | CA | |
| - | CA |
Reviews
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