2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1093291635 MD
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BRIAN RODYSILL, MD

Sleep Medicine (Internal Medicine) Physician in NOVATO, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
106
Medicare Part D claims · 21 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$108.2
4 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BRIAN RODYSILL, MD filed 106 Medicare Part D claims in 2023 as a Sleep Medicine (Internal Medicine) Physician in NOVATO, California, prescribing 76% generic.

106
Part D claims, 2023
76%
generic prescribing
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.

BRIAN RODYSILL, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

106 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

BRIAN RODYSILL, MD 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 BRIAN RODYSILL, MD?

Quality data not reported

NPI registry status

Active

Issued 07/17/2018

NPI 1093291635

Primary specialty

Sleep Medicine (Internal Medicine) Physician

Niche

857 US NPIs in this specialty

Medicare Part D claims

106 92% vs specialty avg

2023 prescription claims

Specialty avg: 1,310

Specialty distribution in California

How Sleep Medicine (Internal Medicine) Physician compares to other specialties among California providers

California providers

Sleep Medicine (Internal Medicine) Physician share within California

1. Sleep Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Sleep Medicine (Internal Medicine) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Sleep Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Sleep Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Sleep Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Sleep Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

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).

BRIAN RODYSILL, MD appears in the CMS NPPES registry as a Sleep Medicine (Internal Medicine) Physician provider holding MD credentials at 100 ROWLAND WAY STE 300, NOVATO, CA, 94945, with a listed phone of (415) 878-0225. NPI 1093291635 was issued on 07/17/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RODYSILL most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 106 prescription claims written by this provider, covering 21 Medicare beneficiaries and totaling roughly $18K in drug spend, split 24% brand-name and 76% generic by claim count, with an opioid prescribing rate of 23.6%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Sleep Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 857 enrolled providers across 52 states and an average of 1,310 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

100 ROWLAND WAY STE 300
NOVATO, CA 94945

Provider Details

NPI 1093291635
Specialty Sleep Medicine (Internal Medicine) Physician
Credentials MD
Gender Male
NPI Issued 07/17/2018

Hospital and facility affiliations

Facilities where BRIAN RODYSILL, MD 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.

DARYA SOTO MD INC
NOVATO, 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).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for BRIAN RODYSILL, MD. Source: openpaymentsdata.cms.gov.

Total received

$108

Largest payer

Fisher & Paykel Healthcare Inc

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

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 BRIAN RODYSILL, MD. To verify BRIAN RODYSILL, 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.

Brand vs generic prescribing mix · Typical

BRIAN RODYSILL, MD — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 106 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

106
Total Claims
$18K
Total Drug Cost
21
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
122
Total Day Supply
3,284
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$16K
Generic Drug Cost
$2K
Opioid Claims
25 (23.6% rate)

Patient Demographics

Average Patient Age
71.0 years
Avg HCC Risk Score
1.09

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What BRIAN RODYSILL, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Gabapentin
21
Clonazepam
11
Mirtazapine
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Sleep Medicine (Internal Medicine) Physician Overview

How BRIAN RODYSILL, MD fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.

857
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,310
Avg Claims per Provider

BRIAN RODYSILL, MD's 106 claims are below the specialty average of 1,310.

Nearby Sleep Medicine (Internal Medicine) Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as RODYSILL.

Compare Sleep Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BRIAN RODYSILL, MD's specialty?
BRIAN RODYSILL, MD specializes in Sleep Medicine (Internal Medicine) Physician and practices in NOVATO, California. Credentials: MD.
How much does BRIAN RODYSILL, MD prescribe under Medicare Part D?
In 2023, BRIAN RODYSILL, MD wrote 106 Medicare Part D claims totaling $18K in drug costs for 21 beneficiaries.
Where is BRIAN RODYSILL, MD located?
BRIAN RODYSILL, MD is located at 100 ROWLAND WAY STE 300, NOVATO, CA, 94945. Phone: (415) 878-0225.
What is BRIAN RODYSILL, MD's NPI number?
BRIAN RODYSILL, MD's National Provider Identifier (NPI) is 1093291635, issued on 07/17/2018.
Does BRIAN RODYSILL, MD prescribe more brand-name or generic drugs?
BRIAN RODYSILL, MD's prescribing is 24% brand-name and 76% generic drugs by claim count, with $16K in brand drug costs.
Does BRIAN RODYSILL, MD prescribe opioids?
Yes, BRIAN RODYSILL, MD had 25 opioid claims in 2023 with an opioid prescribing rate of 23.6%.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US?
There are 857 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,310 Medicare Part D claims per year.
What drugs does BRIAN RODYSILL, MD prescribe most often?
Based on 2023 Medicare Part D data, BRIAN RODYSILL, MD's most frequently prescribed drugs include Gabapentin, Clonazepam, Mirtazapine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRIAN RODYSILL, MD accept Medicare?
BRIAN RODYSILL, MD appears in CMS Medicare data with 106 Part D claims and 21 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRIAN RODYSILL, MD's credentials?
BRIAN RODYSILL, MD's NPI is 1093291635 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

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