Erica Mascarenhas
NPI 1114554474 · Internal Medicine Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erica Mascarenhas is a Internal Medicine Physician provider in Stanford, CA (NPI 1114554474).
Provider details
- NPI number
- 1114554474
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- Yes
- License
- 335506 (LA)
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 tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
70 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 39 | $63 |
| 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 | 31 | $16 |
Typical Medicare-allowed amounts for these services range $16–$63 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 30 | 14 |
| Lisinopril | 22 | — |
| Atorvastatin Calcium | 19 | — |
| Hydrochlorothiazide | 13 | — |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 12 | — |
| Semaglutidebrand: Ozempic | 12 | — |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-03-26
- Last updated
- 2024-05-17
- Certified
- 2024-05-17
Frequently asked questions
- What is Erica Mascarenhas's NPI number?
- Erica Mascarenhas's National Provider Identifier (NPI) is 1114554474, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erica Mascarenhas's specialty?
- Erica Mascarenhas is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Erica Mascarenhas located?
- Erica Mascarenhas's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Erica Mascarenhas's phone number?
- The practice phone number listed in the NPPES registry for Erica Mascarenhas is (650) 723-5948.
- Does Erica Mascarenhas accept Medicare?
- Erica Mascarenhas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erica Mascarenhas's NPI active?
- Yes — Erica Mascarenhas's NPI (1114554474) is active in the NPPES registry as of the last update on 2024-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.