NPI registry status
Active
2026 NPPES data Hospice and Palliative Medicine (Internal Medicine) Physician NPI 1851747901
Verify on CMS → Derek Moriyama
Hospice and Palliative Medicine (Internal Medicine) Physician in Tustin, 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 1,637 in Hospice and Palliative Medicine (Internal 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
562
Medicare Part D claims · 115 beneficiaries · Hospice and Palliative Medicine (Internal Medicine) Physician avg: 1K
What the federal data shows
Derek Moriyama filed 562 Medicare Part D claims in 2024 as a Hospice and Palliative Medicine (Internal Medicine) Physician in Tustin, California.
- 562
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥65th
- 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 Derek Moriyama
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 1851747901), first enumerated 05/08/2016.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 562 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
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Derek Moriyama'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.
CMS NPPES provider registry desk
NPI 1851747901 · Hospice and Palliative Medicine (Internal Medicine) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1851747901
- ENUM-MID 2016
- TAX-NARROW 1,637
- RX-LIGHT 562
- BOOK-THIN 193 in California
- PHOTO-ENUM Marlen Ortega Cruz · 2016
Derek Moriyama's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
562 ≥ 65th percentile 65% 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)
Derek Moriyama 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 Derek Moriyama?
Quality data not reportedPrimary specialty
Hospice and Palliative Medicine (Internal Medicine) Physician
Medicare Part D claims
562 57% vs specialty avg
Specialty distribution in California
How Hospice and Palliative Medicine (Internal 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 Hospice and Palliative Medicine (Internal 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 | 1851747901 |
|---|---|
| Specialty | Hospice and Palliative Medicine (Internal Medicine) Physician |
| Gender | Male |
| NPI Issued | 05/08/2016 |
Hospital and facility affiliations
Facilities where Derek Moriyama 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.
Hmts Inc
Tustin, 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 Derek Moriyama. To verify Derek Moriyama'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 2024.
562
Total Claims
$45K
Total Drug Cost
115
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 590.3
- Total Day Supply
- 15,990
- Generic Drug Cost
- $14K
Patient Demographics
- Average Patient Age
- 88.0 years
- Avg HCC Risk Score
- 2.53
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Derek Moriyama prescribes most
Top Medicare Part D drugs by claim count, 2024
- Levothyroxine Sodium
Levothyroxine Sodium
97 claims
- Tamsulosin Hcl
Tamsulosin Hcl
44 claims
- Amlodipine Besylate 32
Amlodipine Besylate
32 claims
- Finasteride 25
Finasteride
25 claims
- Metoprolol Succinate 24
Metoprolol Succinate
24 claims
- Atorvastatin Calcium 23
Atorvastatin Calcium
23 claims
- Eliquis 17
Eliquis
17 claims
- Losartan Potassium 16
Losartan Potassium
16 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 97 |
| Tamsulosin Hcl | 44 |
| Amlodipine Besylate | 32 |
| Finasteride | 25 |
| Metoprolol Succinate | 24 |
| Atorvastatin Calcium | 23 |
| Eliquis Apixaban | 17 |
| Losartan Potassium | 16 |
| Folic Acid | 11 |
| Tiotropium Bromide | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hospice and Palliative Medicine (Internal Medicine) Physician in CA →
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Hospice and Palliative Medicine (Internal Medicine) Physician Overview
How Derek Moriyama fits within the Hospice and Palliative Medicine (Internal Medicine) Physician landscape nationally.
1,637
Hospice and Palliative Medicine (Internal Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Internal Medicine) Physician
1,322
Avg Claims per Provider
Derek Moriyama's 562 claims are below the specialty average of 1,322.
Nationwide Hospice and Palliative Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Moriyama, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2016)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Hospice and Palliative 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 Moriyama.
One of 193 Hospice and Palliative Medicine (Internal Medicine) Physician providers enrolled in California, 5 are shown here.
Frequently Asked Questions
What is Derek Moriyama's specialty? ▼
Derek Moriyama specializes in Hospice and Palliative Medicine (Internal Medicine) Physician and practices in Tustin, California.
How much does Derek Moriyama prescribe under Medicare Part D? ▼
In 2024, Derek Moriyama wrote 562 Medicare Part D claims totaling $45K in drug costs for 115 beneficiaries.
Where is Derek Moriyama located? ▼
Derek Moriyama is located at 15000 KENSINGTON PARK DR STE 170, Tustin, CA, 92782. Phone: (714) 477-8300.
What is Derek Moriyama's NPI number? ▼
Derek Moriyama's National Provider Identifier (NPI) is 1851747901, issued on 05/08/2016.
How many Hospice and Palliative Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 1,637 Hospice and Palliative Medicine (Internal Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Internal Medicine) Physician provider writes 1,322 Medicare Part D claims per year.
What drugs does Derek Moriyama prescribe most often? ▼
Based on 2024 Medicare Part D data, Derek Moriyama's most frequently prescribed drugs include Levothyroxine Sodium, Tamsulosin Hcl, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Derek Moriyama accept Medicare? ▼
Derek Moriyama appears in CMS Medicare data with 562 Part D claims and 115 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Derek Moriyama's credentials? ▼
Derek Moriyama's NPI is 1851747901. 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.