Mark Warlen, MD
NPI 1518922178 · Ophthalmology Physician · San Diego, CA
Enrolled with Medicare as Dme Supplier - Physician - Optometrist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Warlen, MD is a Ophthalmology Physician provider in San Diego, CA (NPI 1518922178).
Provider details
- NPI number
- 1518922178
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A52492 (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
20 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
2,831 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 Complete Exam of Visual System92014 | 921 | $133 |
| Established Patient Problem Focused Exam of Visual System92012 | 479 | $95 |
| Imaging of Optic Nerve92133 | 433 | $37 |
| Exam of Visual Field With Extended Testing92083 | 338 | $68 |
| Imaging of Retina92134 | 320 | $42 |
| New Patient Complete Exam of Visual System92004 | 125 | $157 |
| Ultrasound Scan of Cornea to Determine Thickness76514 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 849 | 215 |
| Erythromycin Basebrand: Erythromycin | 134 | 113 |
| Brimonidine Tartrate | 110 | 32 |
| Prednisolone Acetate | 101 | 86 |
| Dorzolamide Hcl | 68 | 28 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 65 | 22 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 63 | 16 |
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
- 2006-04-18
- Last updated
- 2011-01-04
Frequently asked questions
- What is Mark Warlen's NPI number?
- Mark Warlen's National Provider Identifier (NPI) is 1518922178, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Warlen's specialty?
- Mark Warlen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Warlen located?
- Mark Warlen's practice location on file with NPPES is 3720 Third Ave, San Diego, CA 92103-4112.
- What is Mark Warlen's phone number?
- The practice phone number listed in the NPPES registry for Mark Warlen is (619) 298-7221.
- Does Mark Warlen accept Medicare?
- Mark Warlen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Warlen's NPI active?
- Yes — Mark Warlen's NPI (1518922178) is active in the NPPES registry as of the last update on 2011-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.