Robin Mercer, PA-C
NPI 1346592227 · Physician Assistant · Stanford, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robin Mercer, PA-C is a Physician Assistant provider in Stanford, CA (NPI 1346592227).
Provider details
- NPI number
- 1346592227
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 22528 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 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
596 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 | 226 | $130 |
| Replacement of Knee Joint, Both Sides of Knee27447 | 109 | $198 |
| Replacement of Thigh Bone and Hip Joint With Prosthesis27130 | 91 | $196 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 80 | $92 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 61 | $76 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 368 | 170 |
| Celecoxib | 344 | 174 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 128 | 58 |
| Amoxicillin | 113 | 96 |
| Enoxaparin Sodium | 100 | 94 |
| Meloxicam | 67 | 29 |
| Ondansetronbrand: Ondansetron Odt | 65 | 51 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 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
- 2012-10-03
- Last updated
- 2025-12-23
- Certified
- 2025-12-23
Frequently asked questions
- What is Robin Mercer's NPI number?
- Robin Mercer's National Provider Identifier (NPI) is 1346592227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robin Mercer's specialty?
- Robin Mercer is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Robin Mercer located?
- Robin Mercer's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Robin Mercer's phone number?
- The practice phone number listed in the NPPES registry for Robin Mercer is (650) 723-4000.
- Does Robin Mercer accept Medicare?
- Robin Mercer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robin Mercer's NPI active?
- Yes — Robin Mercer's NPI (1346592227) is active in the NPPES registry as of the last update on 2025-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.