2026 NPPES data General Practice Physician NPI 1417976945 M.D.
Verify on CMS →

Royal Dean, M.D.

General Practice Physician in Simi Valley, 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 16,725 in General Practice 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
9K
Medicare Part D claims · 443 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.1/100
▲ 14 pts above national avg 83.1 · Exceptional
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Royal Dean, M.D. reported a CMS MIPS final score of 97.1/100 - above the 83.1 national average - and filed 8,544 Medicare Part D claims in 2023.

97.1/100
MIPS score · +14 vs avg
9K
Part D claims, 2023
86%
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.

Royal Dean, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

97 Top 15% higher than 85% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90+: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Where Royal Dean, M.D. sits

This provider among general practice physician peers

Across the 783 general practice physician providers who report both Medicare Part D prescribing and a MIPS quality score, Royal Dean, M.D. writes more Part D claims than 87% of them and scores higher on MIPS quality than 86% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 98Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 22Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 98Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 28Royal Dean, M.D.-Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 86
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one general practice physician peer from a representative sample of 60; the gold marker is Royal Dean, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Royal Dean, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Royal Dean, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 07/18/2006

NPI 1417976945

Primary specialty

General Practice Physician

Mid-sized

16,725 US NPIs in this specialty

Medicare Part D claims

8,544 197% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

MIPS final score

97.1/100 14 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in California

How General Practice Physician compares to other specialties among California providers

California providers
Behavior Technician - 17.3%Behavior Technician17.3%Marriage & Family Therapist - 5.5%Marriage & Family Therapist5.5%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Mental Health Counselor - 3.9%Mental Health Counselor3.9%Pharmacist - 3.5%Pharmacist3.5%Clinical Social Worker - 3.1%Clinical Social Worker3.1%General Practice Physician - 0.2%General Practice Physician0.2%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Royal Dean, M.D.'s 2023 MIPS final score plotted against the General Practice Physician national average

High performer (top quartile)
MIPS Final Score
97.1/100
vs 83.1 national avg · 2023 performance year

MIPS final score (General Practice Physician) - 97.1/100 vs national avg 83.1

0%100%National avg83%97.1%
MIPS final score (General Practice Physician) - 97.1/100 vs national avg 83.1
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).

Royal Dean, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 1687 ERRINGER RD STE 217, Simi Valley, CA, 93065, with a listed phone of (805) 577-0059. NPI 1417976945 was issued on 07/18/2006.

Medicare Part D records for calendar year 2023 show 8,544 prescription claims written by this provider, covering 443 Medicare beneficiaries and totaling roughly $930K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 1.5%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 97.1/100 for the 2023 performance year (Quality 84.2), compared with the national average of 83.1.

General Practice Physician is a mid-sized specialty nationwide, with 16,725 enrolled providers across 56 states and an average of 2,872 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

1687 ERRINGER RD STE 217
Simi Valley, CA 93065

Provider Details

NPI 1417976945
Specialty General Practice Physician
Credentials M.D.
Gender Male
NPI Issued 07/18/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

97.1217
Final Score
Avg: 83.1
84.2434
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

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 Royal Dean, M.D.. To verify Royal Dean, 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.

Brand vs generic prescribing mix · Typical

Royal Dean, M.D. - brand share 13.0%
General Practice Physician average

13% brand-name claims vs 86% generic, on 8,544 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.

8,544
Total Claims
$930K
Total Drug Cost
443
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
15,373
Total Day Supply
434,005
Brand vs Generic
13% brand / 86% generic
Brand Drug Cost
$734K
Generic Drug Cost
$191K
Opioid Claims
132 (1.5% rate)
Antibiotic Claims
553

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
0.99
Gender Split
58% female / 42% male
Age Distribution
<65: 20, 65-74: 208, 75-84: 159, 85+: 56

Top Prescribed Drugs (Medicare Part D)

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

What Royal Dean, M.D. 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
Levothyroxine Sodium
429
Pantoprazole Sodium
298
Gabapentin
213
Azithromycin
204
Atorvastatin Calcium
192
Metformin Hcl
188
Losartan Potassium
185
Lisinopril
179
Alprazolam
173
Triamterene-Hydrochlorothiazid
Triamterene/Hydrochlorothiazid
143

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

General Practice Physician Overview

How Royal Dean, M.D. fits within the General Practice Physician landscape nationally.

16,725
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

Royal Dean, M.D.'s 8,544 claims are above the specialty average of 2,872.

Nearby General Practice Physician Providers in California

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

Compare General Practice 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 General Practice 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.

Frequently Asked Questions

What is Royal Dean, M.D.'s specialty?
Royal Dean, M.D. specializes in General Practice Physician and practices in Simi Valley, California. Credentials: M.D..
How much does Royal Dean, M.D. prescribe under Medicare Part D?
In 2023, Royal Dean, M.D. wrote 8,544 Medicare Part D claims totaling $930K in drug costs for 443 beneficiaries.
What is Royal Dean, M.D.'s Medicare quality score?
Royal Dean, M.D. has a CMS MIPS Final Score of 97.1/100 (Quality: 84.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Royal Dean, M.D. located?
Royal Dean, M.D. is located at 1687 ERRINGER RD STE 217, Simi Valley, CA, 93065. Phone: (805) 577-0059.
What is Royal Dean, M.D.'s NPI number?
Royal Dean, M.D.'s National Provider Identifier (NPI) is 1417976945, issued on 07/18/2006.
Does Royal Dean, M.D. prescribe more brand-name or generic drugs?
Royal Dean, M.D.'s prescribing is 13% brand-name and 86% generic drugs by claim count, with $734K in brand drug costs.
Does Royal Dean, M.D. prescribe opioids?
Yes, Royal Dean, M.D. had 132 opioid claims in 2023 with an opioid prescribing rate of 1.5%.
How many General Practice Physician providers are there in the US?
There are 16,725 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does Royal Dean, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Royal Dean, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Pantoprazole Sodium, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Royal Dean, M.D. accept Medicare?
Royal Dean, M.D. appears in CMS Medicare data with 8,544 Part D claims and 443 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Royal Dean, M.D.'s credentials?
Royal Dean, M.D.'s NPI is 1417976945 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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.

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.