Erica Mascarenhas
Internal Medicine · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
Offices
1 location
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Erica Mascarenhas’s office at (650) 723-5948 to ask if they take your plan before you enroll.
Original Medicare doctor bills
$2,194
Medicare paid this office $2,194 for 43 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 37 | $1,534 | $39 |
| 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's | 30 | $365 | $12 |
Who their Medicare patients are
43 Original Medicare patients in 2024. Average age 67 · Women 65% · Also on Medicaid 72% · Health risk score 1.30. At or below the middle of the specialty; the typical internal medicine clinician is at 1.76.
Conditions among them: High blood pressure 75% · Diabetes 40% · Chronic kidney disease 37%.
The office billed $11,449, Medicare allowed $3,637 and paid $2,194; for 79 services of 4 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Year by year
| 2024 | 43 | 79 | 67 | 1.30 | $11,449 | $2,194 |
| 2023 | 50 | 62 | 68 | 1.40 | $17,687 | $3,604 |
Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.
See the services billed each year
2023: 2 services
| Short return visit (20+ min) | 33 | $1,913 | $48 |
| Return visit (30+ min) | 12 | $1,210 | $76 |
Medicaid work
$19,653 in 2024
Medicaid paid $19,653 for 957 billed services this clinician did in 2024, up to 73 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
| Short return visit (20+ min) | 560 | $17,734 |
| Blood test, lipids (cholesterol and triglycerides) | 87 | $829 |
| Hemoglobin A1C level | 84 | $563 |
| COLLECTION VENOUS BLOOD VENIPUNCTURE | 150 | $361 |
| Immunization administration (includes percutaneous, intradermal, subcutaneous, or intramuscular injections); 1 vaccine (single or combination vaccine/toxoid) | 27 | $94 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) | 16 | $71 |
| 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's single, serious condition or a complex condition. (add-on code, list separately in addition to office/outpatient evaluation and management visit, new or established) | 33 | $0 |
| 2024 | 957 | 7 | 73 | $19,653 |
| 2023 | 743 | 7 | 48 | $14,460 |
See the largest Medicaid services in earlier years
2023
| Short return visit (20+ min) | 458 | $12,106 |
| Return visit (30+ min) | 48 | $1,441 |
| Influenza virus vaccine, quadrivalent (ccIIV4), derived from cell cultures, subunit, preservative and antibiotic free, 0.5 mL dosage, for intramuscular use | 36 | $280 |
| Hemoglobin A1C level | 36 | $214 |
| COLLECTION VENOUS BLOOD VENIPUNCTURE | 85 | $170 |
| Blood test, lipids (cholesterol and triglycerides) | 15 | $134 |
| Immunization administration (includes percutaneous, intradermal, subcutaneous, or intramuscular injections); 1 vaccine (single or combination vaccine/toxoid) | 65 | $115 |
Drugs they prescribed that Part D paid
$53,103
Pharmacies billed $53,103 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
217 generic and fewer than 11 brand-name prescriptions · $53,103 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
| Ozempic | 12 | $11,700 | $975 |
| Lantus Solostar | 12 | $1,193 | $99 |
| Atorvastatin | 19 | $137 | $7 |
| Amlodipine Besylate | 30 | $95 | $3 |
| Metformin | 11 | $85 | $8 |
See all 7 drugs
| Ozempic | 12 | $11,700 | $975 |
| Lantus Solostar | 12 | $1,193 | $99 |
| Atorvastatin | 19 | $137 | $7 |
| Amlodipine Besylate | 30 | $95 | $3 |
| Metformin | 11 | $85 | $8 |
| Lisinopril | 22 | $79 | $4 |
| Hydrochlorothiazide | 13 | $42 | $3 |
Year by year
| 2024 | 308 | 72 | None | None | $53,103 |
| 2023 | 281 | 65 | None | None | $32,390 |
| 2022 | 152 | 52 | 0% (0) | None | $4,982 |
| 2021 | 116 | 36 | None | None | $5,604 |
| 2020 | 17 | None | 0% (0) | None | $533 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 4 drugs
| Amlodipine Besylate | 34 | $351 | $10 |
| Atorvastatin | 34 | $280 | $8 |
| Allopurinol | 11 | $125 | $11 |
| Metformin | 13 | $114 | $9 |
2022: 2 drugs
| Atorvastatin | 21 | $164 | $8 |
| Lisinopril | 16 | $135 | $8 |
2021: 1 drug
| Spironolactone | 12 | $97 | $8 |
Money from drug and device companies
$157 in 2025
A payment is not proof that care is biased.
| Merck Sharp & Dohme | Zerbaxa | $89 | 4 payments
|
| Boehringer Ingelheim Pharmaceuticals | None | $68 | 1 payment
|
See all 5 published payments
| Merck Sharp & Dohme | Meals · 2025-12-16 | Zerbaxa | $27 |
| Merck Sharp & Dohme | Meals · 2025-11-07 | Zerbaxa | $23 |
| Merck Sharp & Dohme | Meals · 2025-09-12 | Zerbaxa | $21 |
| Boehringer Ingelheim Pharmaceuticals | Meals · 2025-06-10 | None | $68 |
| Merck Sharp & Dohme | Meals · 2025-04-28 | Zerbaxa | $17 |
Professional record
- NPI
- 1114554474
- Licence
- LA 335506
More record details
- Sole proprietor
- Yes
- Taxonomy
- Internal medicine (207R00000X); Hospitalist (208M00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2020-03-26
- NPI last updated
- 2024-05-17
- NPI record certified
- 2024-05-17
This is when the NPI record was last certified, not a medical board exam.