Margaret Spencer, MD
NPI 1104919539 · Ophthalmology Physician · Panorama City, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Spencer, MD is a Ophthalmology Physician provider in Panorama City, CA (NPI 1104919539).
Provider details
- NPI number
- 1104919539
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A54824 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
29 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $94 |
Typical Medicare-allowed amounts for these services range $94–$94 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 3,028 | 1,189 |
| Brimonidine Tartrate | 1,016 | 394 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 785 | 256 |
| Timolol Maleate | 585 | 221 |
| Dorzolamide Hcl | 273 | 95 |
| Netarsudil Mesylatebrand: Rhopressa | 209 | 90 |
| Cyclosporine | 94 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-30
- Last updated
- 2021-12-01
Frequently asked questions
- What is Margaret Spencer's NPI number?
- Margaret Spencer's National Provider Identifier (NPI) is 1104919539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Spencer's specialty?
- Margaret Spencer is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Spencer located?
- Margaret Spencer's practice location on file with NPPES is 13652 Cantara St, Panorama City, CA 91402-5423.
- What is Margaret Spencer's phone number?
- The practice phone number listed in the NPPES registry for Margaret Spencer is (818) 375-2000.
- Does Margaret Spencer accept Medicare?
- Margaret Spencer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Spencer's NPI active?
- Yes — Margaret Spencer's NPI (1104919539) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.