Mark Wieland, MD
NPI 1134114382 · Ophthalmology Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Wieland, MD is a Ophthalmology Physician provider in Mountain View, CA (NPI 1134114382).
Provider details
- NPI number
- 1134114382
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 00A48482 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
8,976 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) |
|---|---|---|
| Imaging of Retina92134 | 3,436 | $52 |
| Injection of Drug Into Eye67028 | 1,887 | $146 |
| Established Patient Problem Focused Exam of Visual System92012 | 1,620 | $117 |
| Established Patient Complete Exam of Visual System92014 | 1,389 | $164 |
| Exam of Retinal Blood Vessels Using a Special Camera After Injection of a Dye92235 | 199 | $224 |
| New Patient Complete Exam of Visual System92004 | 193 | $192 |
| Photography of the Retina |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Latanoprost | 31 |
| Timolol Maleate | 25 |
| Ketorolac Tromethamine | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$338 across 8 records (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
- 2005-09-14
- Last updated
- 2017-12-14
Frequently asked questions
- What is Mark Wieland's NPI number?
- Mark Wieland's National Provider Identifier (NPI) is 1134114382, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Wieland's specialty?
- Mark Wieland is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Wieland located?
- Mark Wieland's practice location on file with NPPES is 2485 Hospital Dr, Mountain View, CA 94040-4101.
- What is Mark Wieland's phone number?
- The practice phone number listed in the NPPES registry for Mark Wieland is (650) 988-7480.
- Does Mark Wieland accept Medicare?
- Mark Wieland is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Wieland's NPI active?
- Yes — Mark Wieland's NPI (1134114382) is active in the NPPES registry as of the last update on 2017-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.