Hillary Pereira, M.D.
NPI 1134327224 · General Acute Care Hospital · San Ramon, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hillary Pereira, M.D. is a General Acute Care Hospital provider in San Ramon, CA (NPI 1134327224).
Provider details
- NPI number
- 1134327224
- Entity type
- Individual
- Primary specialty
- General Acute Care HospitalHospitals
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Hospitals
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
23 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 23 | $127 |
Typical Medicare-allowed amounts for these services range $127–$127 (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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tramadol Hcl | 41 | 41 |
| Ondansetronbrand: Ondansetron Odt | 23 | 23 |
| Doxycycline Monohydrate | 14 | 14 |
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.
Practice location
Mailing address
Additional practice locations (1)
- 2500 Merced StSan Leandro, CA 94577-4201Phone: (510) 454-1000
Registry dates
- Enumerated
- 2007-07-10
- Last updated
- 2022-09-08
- Certified
- 2022-09-08
Frequently asked questions
- What is Hillary Pereira's NPI number?
- Hillary Pereira's National Provider Identifier (NPI) is 1134327224, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hillary Pereira's specialty?
- Hillary Pereira is listed in the NPPES registry with a primary specialty of General Acute Care Hospital (Hospitals).
- Where is Hillary Pereira located?
- Hillary Pereira's practice location on file with NPPES is 6001 Norris Canyon Rd, San Ramon, CA 94583-5400.
- What is Hillary Pereira's phone number?
- The practice phone number listed in the NPPES registry for Hillary Pereira is (925) 275-8280.
- Does Hillary Pereira accept Medicare?
- Hillary Pereira is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hillary Pereira's NPI active?
- Yes — Hillary Pereira's NPI (1134327224) is active in the NPPES registry as of the last update on 2022-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.