NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1679653976 D.O.
Verify on CMS → Joseph Cassady, D.O.
Addiction Medicine (Family Medicine) Physician in Marysville, 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 799 in Addiction Medicine (Family Medicine) 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
653
Medicare Part D claims · 48 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$143.98
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Joseph Cassady, D.O. filed 653 Medicare Part D claims in 2024 as an Addiction Medicine (Family Medicine) Physician in Marysville, California, prescribing 83% generic.
- 653
- Part D claims, 2024
- 83%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Joseph Cassady, D.O.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1679653976), first enumerated 10/17/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 653 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$143.98 in reported industry payments (5 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Joseph Cassady, D.O.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Cassady with other Addiction Medicine (Family Medicine) Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in California
- Dr. Matthew Abinante, DO, MPH Huntington Beach, CA
- Dr. Paul Abramson, M.D. San Francisco, CA
- Dr. Kami Adibi, M.D. Los Angeles, CA
- Dr. Belis Aladag, MD, MPH, FASAM Walnut Creek, CA
- Dr. Marianne Aldridge, M.D. Loma Linda, CA
- Dr. Abdul Mureed Alim, MD Modesto, CA
Other specialties in Marysville: Addiction (Substance Use Disorder) Counselor (85) · Behavior Technician (69) · Physician Assistant (30) · Marriage & Family Therapist (27)
CMS NPPES provider registry desk
NPI 1679653976 · Addiction Medicine (Family Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1679653976
- ENUM-LEGACY 2006
- TAX-NARROW 799
- RX-LIGHT 653
- BOOK-THIN 111 in California
- PHOTO-ENUM David Keseg, M.D. · 2006
Joseph Cassady, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
653 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Joseph Cassady, D.O. 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 Joseph Cassady, D.O.?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
653 45% vs specialty avg
Specialty distribution in California
How Addiction Medicine (Family Medicine) 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 Addiction Medicine (Family Medicine) 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 | 1679653976 |
|---|---|
| Specialty | Addiction Medicine (Family Medicine) Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 10/17/2006 |
Hospital and facility affiliations
Facilities where Joseph Cassady, D.O. 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.
Peach Tree Healthcare
Marysville, 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 Joseph Cassady, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$144
Largest payer
Gilead Sciences, 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 Joseph Cassady, D.O.. To verify Joseph Cassady, D.O.'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
Joseph Cassady, D.O. - brand share 17.0%
Addiction Medicine (Family Medicine) Physician average
17% brand-name claims vs 83% generic, on 653 2024 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 2024.
653
Total Claims
$136K
Total Drug Cost
48
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 717.067
- Total Day Supply
- 18,618
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $84K
- Generic Drug Cost
- $52K
- Opioid Claims
- 17 (2.6% rate)
Patient Demographics
- Average Patient Age
- 58.5 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 29, 65-74: 18, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Joseph Cassady, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
259 claims
- Clonazepam 44
Clonazepam
44 claims
- Suboxone 36
Suboxone
36 claims
- Lisinopril 25
Lisinopril
25 claims
- Gabapentin 23
Gabapentin
23 claims
- Sublocade 17
Sublocade
17 claims
- Alprazolam 16
Alprazolam
16 claims
- Metformin Hcl 16
Metformin Hcl
16 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 259 |
| Clonazepam | 44 |
| Suboxone Buprenorphine Hcl/Naloxone Hcl | 36 |
| Lisinopril | 25 |
| Gabapentin | 23 |
| Sublocade Buprenorphine | 17 |
| Alprazolam | 16 |
| Metformin Hcl | 16 |
| Benazepril Hcl | 14 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Family Medicine) Physician in CA →
All providers in California →
Compare specialties →
Addiction Medicine (Family Medicine) Physician Overview
How Joseph Cassady, D.O. fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.
799
Addiction Medicine (Family Medicine) Physician Providers in US
49
States with Addiction Medicine (Family Medicine) Physician
1,187
Avg Claims per Provider
Joseph Cassady, D.O.'s 653 claims are below the specialty average of 1,187.
Nationwide Addiction Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Cassady, 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 Addiction Medicine (Family Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Cassady.
One of 111 Addiction Medicine (Family Medicine) Physician providers enrolled in California, 11 are shown on this page.
Dr. Karen Antwiler
M.D.
Cathedral City, CA
Dr. Dale Apodaca
M.D.
San Diego, CA
Dr. Alexandra Arenson
DO
Walnut Creek, CA
Dr. Jonathan Avalos
M.D.
Rialto, CA
Dr. Jerry Ayers
MD
San Diego, CA
Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Joseph Cassady, D.O.'s specialty? ▼
Joseph Cassady, D.O. specializes in Addiction Medicine (Family Medicine) Physician and practices in Marysville, California. Credentials: D.O..
How much does Joseph Cassady, D.O. prescribe under Medicare Part D? ▼
In 2024, Joseph Cassady, D.O. wrote 653 Medicare Part D claims totaling $136K in drug costs for 48 beneficiaries.
Where is Joseph Cassady, D.O. located? ▼
Joseph Cassady, D.O. is located at 5730 PACKARD AVENUE, Marysville, CA, 95901. Phone: (530) 749-8313.
What is Joseph Cassady, D.O.'s NPI number? ▼
Joseph Cassady, D.O.'s National Provider Identifier (NPI) is 1679653976, issued on 10/17/2006.
Does Joseph Cassady, D.O. prescribe more brand-name or generic drugs? ▼
Joseph Cassady, D.O.'s prescribing is 17% brand-name and 83% generic drugs by claim count, with $84K in brand drug costs.
Does Joseph Cassady, D.O. prescribe opioids? ▼
Yes, Joseph Cassady, D.O. had 17 opioid claims in 2024 with an opioid prescribing rate of 2.6%.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 799 Addiction Medicine (Family Medicine) Physician providers across 49 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,187 Medicare Part D claims per year.
What drugs does Joseph Cassady, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, Joseph Cassady, D.O.'s most frequently prescribed drugs include Buprenorphine-Naloxone, Clonazepam, Suboxone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Joseph Cassady, D.O. accept Medicare? ▼
Joseph Cassady, D.O. appears in CMS Medicare data with 653 Part D claims and 48 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Joseph Cassady, D.O.'s credentials? ▼
Joseph Cassady, D.O.'s NPI is 1679653976 with credentials D.O.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.