NPI registry status
Active
2026 NPPES data Pain Medicine Physician NPI 1720499759 D.O.
Verify on CMS → Ryan Clark, D.O.
Pain Medicine Physician in Green Bay, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,006 in Pain 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
2K
Medicare Part D claims · 543 beneficiaries · Pain Medicine Physician avg: 2K
Generic prescribing
>99%
generic claims · <1% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.7K
35 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ryan Clark, D.O. filed 1,561 Medicare Part D claims in 2024 as a Pain Medicine Physician in Green Bay, Wisconsin, prescribing >99% generic.
- 2K
- Part D claims, 2024
- >99%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥81st
- 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 Ryan Clark, D.O.
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 1720499759), first enumerated 05/13/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,561 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
- Reported
Industry payment transparency
$1.7K in reported industry payments (35 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 1720499759 · Pain Medicine Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1720499759
- ENUM-MID 2014
- TAX-NARROW 1,006
- RX-MID 1,561
- BOOK-THIN 16 in Wisconsin
- PHOTO-ENUM Gabrielle Meyer · 2014
Ryan Clark, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,561 ≥ 81st percentile 81% 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)
Ryan Clark, D.O. 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 Ryan Clark, D.O.?
Quality data not reportedPrimary specialty
Pain Medicine Physician
Medicare Part D claims
1,561 25% vs specialty avg
Specialty distribution in Wisconsin
How Pain Medicine Physician compares to other specialties among Wisconsin 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 Pain 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 | 1720499759 |
|---|---|
| Specialty | Pain Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 05/13/2014 |
Hospital and facility affiliations
Facilities where Ryan Clark, D.O. 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.
Baycare Clinic LLP
Green Bay, WI
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 Ryan Clark, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$1.7K
Largest payer
Abbott Laboratories
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
Ryan Clark, D.O. - brand share 1.0%
Pain Medicine Physician average
<1% brand-name claims vs >99% generic, on 1,561 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.
1,561
Total Claims
$28K
Total Drug Cost
543
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,836.133
- Total Day Supply
- 47,146
- Brand vs Generic
- <1% brand / >99% generic
- Brand Drug Cost
- $11K
- Generic Drug Cost
- $17K
- Opioid Claims
- 235 (15.1% rate)
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.38
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 78, 65-74: 213, 75-84: 202, 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 Ryan Clark, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Gabapentin
Gabapentin
469 claims
- Duloxetine Hcl
Duloxetine Hcl
427 claims
- Hydrocodone-Acetam… 174
Hydrocodone-Acetaminophen
174 claims
- Tizanidine Hcl 99
Tizanidine Hcl
99 claims
- Pregabalin 54
Pregabalin
54 claims
- Cyclobenzaprine Hcl 40
Cyclobenzaprine Hcl
40 claims
- Methylprednisolone 38
Methylprednisolone
38 claims
- Nortriptyline Hcl 30
Nortriptyline Hcl
30 claims
| Drug | Claims |
|---|---|
| Gabapentin | 469 |
| Duloxetine Hcl | 427 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 174 |
| Tizanidine Hcl | 99 |
| Pregabalin | 54 |
| Cyclobenzaprine Hcl | 40 |
| Methylprednisolone | 38 |
| Nortriptyline Hcl | 30 |
| Diazepam | 28 |
| Tramadol Hcl | 25 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pain Medicine Physician Overview
How Ryan Clark, D.O. fits within the Pain Medicine Physician landscape nationally.
1,006
Pain Medicine Physician Providers in US
49
States with Pain Medicine Physician
2,094
Avg Claims per Provider
Ryan Clark, D.O.'s 1,561 claims are below the specialty average of 2,094.
Nationwide Pain Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Clark, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pain Medicine Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Clark.
One of 16 Pain Medicine Physician providers enrolled in Wisconsin, 5 are shown here.
Alaa Abd-Elsayed
Madison, WI
Dr. Kwadwo Achampong
M.D.
Madison, WI
Luisa Bastian
Waukesha, WI
Dr. David Bryce
MD
Middleton, WI
Dr. Timothy Casias
M.D.
Middleton, WI
Compare Pain Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ryan Clark, D.O.'s specialty? ▼
Ryan Clark, D.O. specializes in Pain Medicine Physician and practices in Green Bay, Wisconsin. Credentials: D.O..
How much does Ryan Clark, D.O. prescribe under Medicare Part D? ▼
In 2024, Ryan Clark, D.O. wrote 1,561 Medicare Part D claims totaling $28K in drug costs for 543 beneficiaries.
Where is Ryan Clark, D.O. located? ▼
Ryan Clark, D.O. is located at 2845 GREENBRIER RD, Green Bay, WI, 54311. Phone: (920) 288-8377.
What is Ryan Clark, D.O.'s NPI number? ▼
Ryan Clark, D.O.'s National Provider Identifier (NPI) is 1720499759, issued on 05/13/2014.
Does Ryan Clark, D.O. prescribe more brand-name or generic drugs? ▼
Ryan Clark, D.O.'s prescribing is <1% brand-name and >99% generic drugs by claim count, with $11K in brand drug costs.
Does Ryan Clark, D.O. prescribe opioids? ▼
Yes, Ryan Clark, D.O. had 235 opioid claims in 2024 with an opioid prescribing rate of 15.1%.
How many Pain Medicine Physician providers are there in the US? ▼
There are 1,006 Pain Medicine Physician providers across 49 states in the US. The average Pain Medicine Physician provider writes 2,094 Medicare Part D claims per year.
What drugs does Ryan Clark, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, Ryan Clark, D.O.'s most frequently prescribed drugs include Gabapentin, Duloxetine Hcl, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ryan Clark, D.O. accept Medicare? ▼
Ryan Clark, D.O. appears in CMS Medicare data with 1,561 Part D claims and 543 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ryan Clark, D.O.'s credentials? ▼
Ryan Clark, D.O.'s NPI is 1720499759 with credentials D.O.. 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.