NPI registry status
Active
2026 NPPES data Sleep Medicine (Otolaryngology) Physician NPI 1831264068 MD
Verify on CMS → Robert Riley, MD
Sleep Medicine (Otolaryngology) Physician in Palo Alto, 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 98 in Sleep Medicine (Otolaryngology) 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.
What the federal data shows
Robert Riley, MD is a Sleep Medicine (Otolaryngology) Physician in Palo Alto, California, listed in the federal CMS National Provider Identifier registry.
- #523
- Sleep Medicine (Otolaryngology) Physician rank among California specialties
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.
CMS NPPES provider registry desk
NPI 1831264068 · Sleep Medicine (Otolaryngology) Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1831264068
- ENUM-LEGACY 2006
- TAX-TRACE 98
- RX-NONE No Part D
- BOOK-THIN 11 in California
- PHOTO-ENUM Eric Bergson · 2006
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Board-eligible specialty (heuristic, not verified)
Robert Riley, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Robert Riley, MD?
Quality data not reportedPrimary specialty
Sleep Medicine (Otolaryngology) Physician
Specialty distribution in California
How Sleep Medicine (Otolaryngology) 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 Sleep Medicine (Otolaryngology) 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).
Practice Address
Provider Details
| NPI | 1831264068 |
|---|---|
| Specialty | Sleep Medicine (Otolaryngology) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/22/2006 |
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 Riley, MD. To verify Robert Riley, MD'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.
More Sleep Medicine (Otolaryngology) Physician in CA →
All providers in California →
Compare specialties →
Sleep Medicine (Otolaryngology) Physician Overview
How Robert Riley, MD fits within the Sleep Medicine (Otolaryngology) Physician landscape nationally.
98
Sleep Medicine (Otolaryngology) Physician Providers in US
29
States with Sleep Medicine (Otolaryngology) Physician
543
Avg Claims per Provider
Nationwide Sleep Medicine (Otolaryngology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Riley, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Sleep Medicine (Otolaryngology) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Riley.
One of 11 Sleep Medicine (Otolaryngology) Physician providers enrolled in California, 5 are shown here.
Dr. Nancy Bryant
M.D.
San Leandro, CA
Dr. Robson Capasso
MD
Stanford, CA
Dr. Aliya Ferouz-Colborn
M.D.
Encinitas, CA
Dr. John Harris
M.D.
Concord, CA
Dr. Jerome Hester
MD
Palo Alto, CA
Compare Sleep Medicine (Otolaryngology) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robert Riley, MD's specialty? ▼
Robert Riley, MD specializes in Sleep Medicine (Otolaryngology) Physician and practices in Palo Alto, California. Credentials: MD.
Where is Robert Riley, MD located? ▼
Robert Riley, MD is located at 750 WELCH RD, Palo Alto, CA, 94304. Phone: (650) 328-0511.
What is Robert Riley, MD's NPI number? ▼
Robert Riley, MD's National Provider Identifier (NPI) is 1831264068, issued on 11/22/2006.
How many Sleep Medicine (Otolaryngology) Physician providers are there in the US? ▼
There are 98 Sleep Medicine (Otolaryngology) Physician providers across 29 states in the US. The average Sleep Medicine (Otolaryngology) Physician provider writes 543 Medicare Part D claims per year.
Does Robert Riley, MD accept Medicare? ▼
Robert Riley, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Riley, MD's credentials? ▼
Robert Riley, MD's NPI is 1831264068 with credentials MD. 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.
- 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.