Karen Shih, M.D.
NPI 1750565982 · Ophthalmology Physician · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Shih, M.D. is a Ophthalmology Physician provider in Sunnyvale, CA (NPI 1750565982).
Provider details
- NPI number
- 1750565982
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A93631 (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
18 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
2,753 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 430 | $155 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 413 | $111 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 405 | $19 |
| Imaging of Optic Nerve92133 | 396 | $45 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 383 | $31 |
| Exam of Visual Field With Extended Testing92083 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 460 | 138 |
| Diclofenac Sodium | 391 | 253 |
| Prednisolone Acetate | 388 | 238 |
| Brimonidine Tartrate | 333 | 137 |
| Ofloxacin | 264 | 210 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 193 | 69 |
| Timolol Maleate | 154 | 54 |
| Dorzolamide Hcl | 113 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$41 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
- 2007-12-24
- Last updated
- 2011-12-07
Frequently asked questions
- What is Karen Shih's NPI number?
- Karen Shih's National Provider Identifier (NPI) is 1750565982, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Shih's specialty?
- Karen Shih is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Shih located?
- Karen Shih's practice location on file with NPPES is 323 N Mathilda Ave, Sunnyvale, CA 94085-4207.
- What is Karen Shih's phone number?
- The practice phone number listed in the NPPES registry for Karen Shih is (408) 524-5900.
- Does Karen Shih accept Medicare?
- Karen Shih is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Shih's NPI active?
- Yes — Karen Shih's NPI (1750565982) is active in the NPPES registry as of the last update on 2011-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.