NPI registry status
Active
2026 NPPES data Urology Physician NPI 1013936749 MD
Verify on CMS → Eric Guilliams, MD
Urology Physician in Joplin, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 13,606 in Urology 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
2K
Medicare Part D claims · 489 beneficiaries · Urology Physician avg: 1K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$350.13
11 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Eric Guilliams, MD filed 1,716 Medicare Part D claims in 2024 as a Urology Physician in Joplin, Missouri, prescribing 98% generic.
- 2K
- Part D claims, 2024
- 98%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥82nd
- 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 Eric Guilliams, MD
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 1013936749), first enumerated 07/19/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,716 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
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$350.13 in reported industry payments (11 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1013936749 · Urology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1013936749
- ENUM-LEGACY 2006
- TAX-MID 14K Urology Physician
- RX-MID 1,716
- BOOK-THIN 250 in Missouri
- PHOTO-ENUM Clarence Johnson, D.O. · 2006
Eric Guilliams, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,716 ≥ 82nd percentile 82% 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)
Eric Guilliams, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Eric Guilliams, MD?
Quality data not reportedPrimary specialty
Urology Physician
Medicare Part D claims
1,716 27% vs specialty avg
Specialty distribution in Missouri
How Urology Physician compares to other specialties among Missouri 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 Urology 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 | 1013936749 |
|---|---|
| Specialty | Urology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/19/2006 |
Hospital and facility affiliations
Facilities where Eric Guilliams, MD 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.
Freeman-Oak Hill Health System
Joplin, MO
Mercy Clinic Springfield Communities
Springfield, MO
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 Eric Guilliams, MD. Source: openpaymentsdata.cms.gov.
Total received
$350
Largest payer
INTUITIVE SURGICAL, 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.
Brand vs generic prescribing mix · Generic-heavy
Eric Guilliams, MD - brand share 2.0%
Urology Physician average
2% brand-name claims vs 98% generic, on 1,716 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.
1,716
Total Claims
$27K
Total Drug Cost
489
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,498.6
- Total Day Supply
- 95,568
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $20K
- Opioid Claims
- 205 (11.9% rate)
- Antibiotic Claims
- 142
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 15% female / 85% male
- Age Distribution
- <65: 45, 65-74: 178, 75-84: 216, 85+: 50
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Eric Guilliams, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Finasteride
Finasteride
469 claims
- Tamsulosin Hcl
Tamsulosin Hcl
449 claims
- Hydrocodone-Acetam… 139
Hydrocodone-Acetaminophen
139 claims
- Alfuzosin Hcl Er 116
Alfuzosin Hcl Er
116 claims
- Oxybutynin Chlorid… 112
Oxybutynin Chloride Er
112 claims
- Tramadol Hcl 42
Tramadol Hcl
42 claims
- Nitrofurantoin Mon… 40
Nitrofurantoin Mono-Macro
40 claims
- Oxybutynin Chloride 30
Oxybutynin Chloride
30 claims
| Drug | Claims |
|---|---|
| Finasteride | 469 |
| Tamsulosin Hcl | 449 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 139 |
| Alfuzosin Hcl Er Alfuzosin Hcl | 116 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 112 |
| Tramadol Hcl | 42 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 40 |
| Oxybutynin Chloride | 30 |
| Ciprofloxacin Hcl | 24 |
| Trospium Chloride | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Urology Physician Overview
How Eric Guilliams, MD fits within the Urology Physician landscape nationally.
13,606
Urology Physician Providers in US
54
States with Urology Physician
1,354
Avg Claims per Provider
Eric Guilliams, MD's 1,716 claims are above the specialty average of 1,354.
Nationwide Urology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Guilliams, both outside Missouri 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 Urology Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Guilliams.
One of 250 Urology Physician providers enrolled in Missouri, 5 are shown here.
Dr. Michael Aberger
M.D.
Saint Joseph, MO
Dr. Kent Adkins
MD
Saint Louis, MO
Dr. Gautum Agarwal
MD
Saint Louis, MO
Dr. Thomas Ahmann
MD
Mexico, MO
Dr. Yousef Al-Shraideh
MD
Saint Louis, MO
Compare Urology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Eric Guilliams, MD's specialty? ▼
Eric Guilliams, MD specializes in Urology Physician and practices in Joplin, Missouri. Credentials: MD.
How much does Eric Guilliams, MD prescribe under Medicare Part D? ▼
In 2024, Eric Guilliams, MD wrote 1,716 Medicare Part D claims totaling $27K in drug costs for 489 beneficiaries.
Where is Eric Guilliams, MD located? ▼
Eric Guilliams, MD is located at 3401 MCINTOSH CIR STE 200, Joplin, MO, 64804. Phone: (417) 347-3703.
What is Eric Guilliams, MD's NPI number? ▼
Eric Guilliams, MD's National Provider Identifier (NPI) is 1013936749, issued on 07/19/2006.
Does Eric Guilliams, MD prescribe more brand-name or generic drugs? ▼
Eric Guilliams, MD's prescribing is 2% brand-name and 98% generic drugs by claim count, with $7K in brand drug costs.
Does Eric Guilliams, MD prescribe opioids? ▼
Yes, Eric Guilliams, MD had 205 opioid claims in 2024 with an opioid prescribing rate of 11.9%.
How many Urology Physician providers are there in the US? ▼
There are 13,606 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,354 Medicare Part D claims per year.
What drugs does Eric Guilliams, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Eric Guilliams, MD's most frequently prescribed drugs include Finasteride, Tamsulosin Hcl, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Eric Guilliams, MD accept Medicare? ▼
Eric Guilliams, MD appears in CMS Medicare data with 1,716 Part D claims and 489 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Eric Guilliams, MD's credentials? ▼
Eric Guilliams, MD's NPI is 1013936749 with credentials MD. 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.