NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1104289123
Verify on CMS → Jameson Petersen
Rheumatology Physician in St George, Utah.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology 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
866
Medicare Part D claims · 166 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
84%
generic claims · 16% 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
Jameson Petersen filed 866 Medicare Part D claims in 2024 as a Rheumatology Physician in St George, Utah, prescribing 84% generic.
- 866
- Part D claims, 2024
- 84%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥72nd
- 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 Jameson Petersen
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 1104289123), first enumerated 03/29/2016.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 866 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
- 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 1104289123 · Rheumatology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104289123
- ENUM-MID 2016
- TAX-MID 6K Rheumatology Physician
- RX-LIGHT 866
- BOOK-THIN 47 in Utah
- PHOTO-ENUM Rana Taherian · 2016
Jameson Petersen's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
866 ≥ 72nd percentile 72% 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)
Jameson Petersen 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 Jameson Petersen?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
866 58% vs specialty avg
Specialty distribution in Utah
How Rheumatology Physician compares to other specialties among Utah 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 Rheumatology 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 | 1104289123 |
|---|---|
| Specialty | Rheumatology Physician |
| Gender | Male |
| NPI Issued | 03/29/2016 |
Hospital and facility affiliations
Facilities where Jameson Petersen 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.
Ihc Health Services Inc
St George, UT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Jameson Petersen - brand share 16.0%
Rheumatology Physician average
16% brand-name claims vs 84% generic, on 866 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.
866
Total Claims
$763K
Total Drug Cost
166
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,736
- Total Day Supply
- 50,434
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $746K
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 15, 65-74: 83, 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 Jameson Petersen prescribes most
Top Medicare Part D drugs by claim count, 2024
- Prednisone
Prednisone
223 claims
- Methotrexate
Methotrexate
193 claims
- Leflunomide 58
Leflunomide
58 claims
- Hydroxychloroquine… 48
Hydroxychloroquine Sulfate
48 claims
- Celecoxib 47
Celecoxib
47 claims
- Folic Acid 35
Folic Acid
35 claims
- Xeljanz Xr 33
Xeljanz Xr
33 claims
- Alendronate Sodium 28
Alendronate Sodium
28 claims
| Drug | Claims |
|---|---|
| Prednisone | 223 |
| Methotrexate Methotrexate Sodium | 193 |
| Leflunomide | 58 |
| Hydroxychloroquine Sulfate | 48 |
| Celecoxib | 47 |
| Folic Acid | 35 |
| Xeljanz Xr Tofacitinib Citrate | 33 |
| Alendronate Sodium | 28 |
| Sulfasalazine | 26 |
| Meloxicam | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Jameson Petersen fits within the Rheumatology Physician landscape nationally.
6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider
Jameson Petersen's 866 claims are below the specialty average of 2,058.
Nationwide Rheumatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Petersen, both outside Utah 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 Rheumatology Physician Providers in Utah
Other clinicians with the same primary specialty enrolled in Utah, drawn from the same CMS NPPES roster as Petersen.
One of 47 Rheumatology Physician providers enrolled in Utah, 5 are shown here.
Swetha Ann Alexander
MBBS
Salt Lake City, UT
Dr. Sara Andersen
MD
Salt Lake City, UT
Dr. Gregory Austad
MD
Layton, UT
Dr. Michael Battistone
MD
Salt Lake City, UT
Dr. Rebecca Baum
MD, PHD
Slc, UT
Compare Rheumatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jameson Petersen's specialty? ▼
Jameson Petersen specializes in Rheumatology Physician and practices in St George, Utah.
How much does Jameson Petersen prescribe under Medicare Part D? ▼
In 2024, Jameson Petersen wrote 866 Medicare Part D claims totaling $763K in drug costs for 166 beneficiaries.
Where is Jameson Petersen located? ▼
Jameson Petersen is located at 544 S 400 E, St George, UT, 84770. Phone: (435) 688-6200.
What is Jameson Petersen's NPI number? ▼
Jameson Petersen's National Provider Identifier (NPI) is 1104289123, issued on 03/29/2016.
Does Jameson Petersen prescribe more brand-name or generic drugs? ▼
Jameson Petersen's prescribing is 16% brand-name and 84% generic drugs by claim count, with $746K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Jameson Petersen prescribe most often? ▼
Based on 2024 Medicare Part D data, Jameson Petersen's most frequently prescribed drugs include Prednisone, Methotrexate, Leflunomide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jameson Petersen accept Medicare? ▼
Jameson Petersen appears in CMS Medicare data with 866 Part D claims and 166 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jameson Petersen's credentials? ▼
Jameson Petersen's NPI is 1104289123. 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.