NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1588869143 M.D.
Verify on CMS → Robert Peralta, M.D.
Ophthalmology Physician in Oakland, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,090 in Ophthalmology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
210
Medicare Part D claims · 123 beneficiaries · Ophthalmology Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Robert Peralta, M.D. filed 210 Medicare Part D claims in 2023 as a Ophthalmology Physician in Oakland, California.
- 210
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Robert Peralta, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
210 49th percentile higher than 49% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Robert Peralta, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Robert Peralta, M.D.?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
210 85% vs specialty avg
Specialty distribution in California
How Ophthalmology Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Ophthalmology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Robert Peralta, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at 491 30TH ST, Oakland, CA, 94609, with a listed phone of (510) 763-0881. NPI 1588869143 was issued on 06/15/2007.
Medicare Part D records for calendar year 2023 show 210 prescription claims written by this provider, covering 123 Medicare beneficiaries and totaling roughly $3K in drug spend, with an opioid prescribing rate of 13.8%.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1588869143 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/15/2007 |
Hospital and facility affiliations
Facilities where Robert Peralta, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Permanente Medical Group Inc
Richmond, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Robert Peralta, M.D.. To verify Robert Peralta, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
210
Total Claims
$3K
Total Drug Cost
123
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 214
- Total Day Supply
- 2,421
- Generic Drug Cost
- $2K
- Opioid Claims
- 29 (13.8% rate)
- Antibiotic Claims
- 43
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 0.99
- Gender Split
- 75% female / 25% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robert Peralta, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Erythromycin
Erythromycin
40 claims
- Lorazepam
Lorazepam
38 claims
- Neomycin-Polymyxin…
Neomycin-Polymyxin-Dexameth
31 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
27 claims
- Acetaminophen-Code…
Acetaminophen-Codeine
24 claims
- Sulfamethoxazole-T… 11
Sulfamethoxazole-Trimethoprim
11 claims
| Drug | Claims |
|---|---|
| Erythromycin Erythromycin Base | 40 |
| Lorazepam | 38 |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 31 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 27 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 24 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Robert Peralta, M.D. fits within the Ophthalmology Physician landscape nationally.
22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Robert Peralta, M.D.'s 210 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Peralta.
Dr. Sam Abbassi
MD, MS
West Hills, CA
Dr. Richard Abbott
M.D.
San Francisco, CA
Dr. Nizar Abdelfattah
MD
Pasadena, CA
Dr. Parastou Abedi
MD
Aliso Viejo, CA
Dr. Shahla Abedi
MD
Aliso Viejo, CA
Compare Ophthalmology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Robert Peralta, M.D.'s specialty? ▼
Robert Peralta, M.D. specializes in Ophthalmology Physician and practices in Oakland, California. Credentials: M.D..
How much does Robert Peralta, M.D. prescribe under Medicare Part D? ▼
In 2023, Robert Peralta, M.D. wrote 210 Medicare Part D claims totaling $3K in drug costs for 123 beneficiaries.
Where is Robert Peralta, M.D. located? ▼
Robert Peralta, M.D. is located at 491 30TH ST, Oakland, CA, 94609. Phone: (510) 763-0881.
What is Robert Peralta, M.D.'s NPI number? ▼
Robert Peralta, M.D.'s National Provider Identifier (NPI) is 1588869143, issued on 06/15/2007.
Does Robert Peralta, M.D. prescribe opioids? ▼
Yes, Robert Peralta, M.D. had 29 opioid claims in 2023 with an opioid prescribing rate of 13.8%.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Robert Peralta, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert Peralta, M.D.'s most frequently prescribed drugs include Erythromycin, Lorazepam, Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Peralta, M.D. accept Medicare? ▼
Robert Peralta, M.D. appears in CMS Medicare data with 210 Part D claims and 123 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Peralta, M.D.'s credentials? ▼
Robert Peralta, M.D.'s NPI is 1588869143 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.