NPI registry status
Active
2026 NPPES data Student in an Organized Health Care Education/Training Program NPI 1124261631 DO
Verify on CMS → Ronald Spier, DO
Student in an Organized Health Care Education/Training Program in Loma Linda, 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 351,014 in Student in an Organized Health Care Education/Training Program, 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
352
Medicare Part D claims · 126 beneficiaries · Student in an Organized Health Care Education/Training Program avg: 488
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ronald Spier, DO filed 352 Medicare Part D claims in 2024 as a Student in an Organized Health Care Education/Training Program in Loma Linda, California, prescribing 87% generic.
- 352
- Part D claims, 2024
- 87%
- generic prescribing
- ≥56th
- 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 Ronald Spier, DO
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 1124261631), first enumerated 04/14/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 352 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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 Ronald Spier, DO'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 1124261631 · Student in an Organized Health Care Education/Training Program
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1124261631
- ENUM-MID 2009
- TAX-MEGA 351K Student in
- RX-LIGHT 352
- BOOK-MID 49,599 in California
- PHOTO-ENUM Carmela Alcantara · 2009
Ronald Spier, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
352 ≥ 56th percentile 56% 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
What does the federal data show about Ronald Spier, DO?
Quality data not reportedPrimary specialty
Student in an Organized Health Care Education/Training Program
Medicare Part D claims
352 28% vs specialty avg
Specialty distribution in California
How Student in an Organized Health Care Education/Training Program 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 Student in an Organized Health Care Education/Training Program. 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 | 1124261631 |
|---|---|
| Specialty | Student in an Organized Health Care Education/Training Program |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/14/2009 |
Hospital and facility affiliations
Facilities where Ronald Spier, DO 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.
Southern California Permanente Medical Group
Fontana, 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 Ronald Spier, DO. To verify Ronald Spier, DO'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
Ronald Spier, DO - brand share 13.0%
Student in an Organized Health Care Education/Training Program average
13% brand-name claims vs 87% generic, on 352 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.
352
Total Claims
$35K
Total Drug Cost
126
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 848.233
- Total Day Supply
- 23,783
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $29K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 39
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 2.52
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 11, 65-74: 44, 75-84: 53, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ronald Spier, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Furosemide
Furosemide
32 claims
- Bisoprolol Fumarate
Bisoprolol Fumarate
24 claims
- Amlodipine Besylate
Amlodipine Besylate
19 claims
- Clopidogrel
Clopidogrel
17 claims
- Eliquis
Eliquis
16 claims
- Atorvastatin Calcium
Atorvastatin Calcium
14 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
13 claims
- Cefpodoxime Proxetil 11
Cefpodoxime Proxetil
11 claims
| Drug | Claims |
|---|---|
| Furosemide | 32 |
| Bisoprolol Fumarate | 24 |
| Amlodipine Besylate | 19 |
| Clopidogrel Clopidogrel Bisulfate | 17 |
| Eliquis Apixaban | 16 |
| Atorvastatin Calcium | 14 |
| Rosuvastatin Calcium | 13 |
| Cefpodoxime Proxetil | 11 |
| Metoprolol Tartrate | 11 |
| Pradaxa Dabigatran Etexilate Mesylate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Student in an Organized Health Care Education/Training Program in CA →
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Student in an Organized Health Care Education/Training Program Overview
How Ronald Spier, DO fits within the Student in an Organized Health Care Education/Training Program landscape nationally.
351,014
Student in an Organized Health Care Education/Training Program Providers in US
55
States with Student in an Organized Health Care Education/Training Program
488
Avg Claims per Provider
Ronald Spier, DO's 352 claims are below the specialty average of 488.
Nationwide Student in an Organized Health Care Education/Training Program peers with similar MIPS or enrollment year
Two federal-record peer sets for Spier, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Student in an Organized Health Care Education/Training Program Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Spier.
One of 49,599 Student in an Organized Health Care Education/Training Program providers enrolled in California, 5 are shown here.
Frequently Asked Questions
What is Ronald Spier, DO's specialty? ▼
Ronald Spier, DO specializes in Student in an Organized Health Care Education/Training Program and practices in Loma Linda, California. Credentials: DO.
How much does Ronald Spier, DO prescribe under Medicare Part D? ▼
In 2024, Ronald Spier, DO wrote 352 Medicare Part D claims totaling $35K in drug costs for 126 beneficiaries.
Where is Ronald Spier, DO located? ▼
Ronald Spier, DO is located at 11234 ANDERSON ST OFC CP 21005, Loma Linda, CA, 92354. Phone: (951) 317-4684.
What is Ronald Spier, DO's NPI number? ▼
Ronald Spier, DO's National Provider Identifier (NPI) is 1124261631, issued on 04/14/2009.
Does Ronald Spier, DO prescribe more brand-name or generic drugs? ▼
Ronald Spier, DO's prescribing is 13% brand-name and 87% generic drugs by claim count, with $29K in brand drug costs.
How many Student in an Organized Health Care Education/Training Program providers are there in the US? ▼
There are 351,014 Student in an Organized Health Care Education/Training Program providers across 55 states in the US. The average Student in an Organized Health Care Education/Training Program provider writes 488 Medicare Part D claims per year.
What drugs does Ronald Spier, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Ronald Spier, DO's most frequently prescribed drugs include Furosemide, Bisoprolol Fumarate, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ronald Spier, DO accept Medicare? ▼
Ronald Spier, DO appears in CMS Medicare data with 352 Part D claims and 126 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ronald Spier, DO's credentials? ▼
Ronald Spier, DO's NPI is 1124261631 with credentials DO. 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.