NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1538184825 MD
Verify on CMS → Ryan Mattison, MD
Hematology (Internal Medicine) Physician in Madison, 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 1,483 in Hematology (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
991
Medicare Part D claims · 95 beneficiaries · Hematology (Internal Medicine) Physician avg: 684
Generic prescribing
74%
generic claims · 26% 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
Ryan Mattison, MD filed 991 Medicare Part D claims in 2024 as a Hematology (Internal Medicine) Physician in Madison, Wisconsin, prescribing 74% generic.
- 991
- Part D claims, 2024
- 74%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥74th
- 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 Mattison, 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 1538184825), first enumerated 07/13/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 991 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 1538184825 · Hematology (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1538184825
- ENUM-LEGACY 2006
- TAX-NARROW 1,483
- RX-LIGHT 991
- BOOK-THIN 15 in Wisconsin
- PHOTO-ENUM Brian Persing, M.D. · 2006
Ryan Mattison, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
991 ≥ 74th percentile 74% 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 Mattison, MD 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 Mattison, MD?
Quality data not reportedPrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
991 45% vs specialty avg
Specialty distribution in Wisconsin
How Hematology (Internal 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 Hematology (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 | 1538184825 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/13/2006 |
Hospital and facility affiliations
Facilities where Ryan Mattison, 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.
University OF Wisconsin Medical Foundation Inc
Madison, 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).
Brand vs generic prescribing mix · Above average
Ryan Mattison, MD - brand share 26.0%
Hematology (Internal Medicine) Physician average
26% brand-name claims vs 74% generic, on 991 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.
991
Total Claims
$3.0M
Total Drug Cost
95
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,377.233
- Total Day Supply
- 38,525
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $2.9M
- Generic Drug Cost
- $140K
- Opioid Claims
- 50 (5.0% rate)
- Antibiotic Claims
- 59
Patient Demographics
- Average Patient Age
- 69.6 years
- Avg HCC Risk Score
- 3.08
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 17, 65-74: 47, 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 Ryan Mattison, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Acyclovir
Acyclovir
159 claims
- Imatinib Mesylate
Imatinib Mesylate
75 claims
- Jakafi
Jakafi
75 claims
- Hydroxyurea 54
Hydroxyurea
54 claims
- Montelukast Sodium 28
Montelukast Sodium
28 claims
- Mirtazapine 26
Mirtazapine
26 claims
- Oxycodone Hcl 22
Oxycodone Hcl
22 claims
- Sulfamethoxazole-T… 22
Sulfamethoxazole-Trimethoprim
22 claims
| Drug | Claims |
|---|---|
| Acyclovir | 159 |
| Imatinib Mesylate | 75 |
| Jakafi Ruxolitinib Phosphate | 75 |
| Hydroxyurea | 54 |
| Montelukast Sodium | 28 |
| Mirtazapine | 26 |
| Oxycodone Hcl | 22 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 22 |
| Prednisone | 20 |
| Sprycel Dasatinib | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hematology (Internal Medicine) Physician in WI →
All providers in Wisconsin →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Ryan Mattison, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,483
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
684
Avg Claims per Provider
Ryan Mattison, MD's 991 claims are above the specialty average of 684.
Nationwide Hematology (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mattison, both outside Wisconsin 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 Hematology (Internal Medicine) Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Mattison.
One of 15 Hematology (Internal Medicine) Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Danielle Atibalentja
M.D., PH.D.
Madison, WI
Dr. David Blake
M.D.
New Berlin, WI
Dr. Wayne Bottner
MD
La Crosse, WI
Dr. Julie Chang
M.D.
Madison, WI
Dr. Joshua Field
MD
Milwaukee, WI
Compare Hematology (Internal Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ryan Mattison, MD's specialty? ▼
Ryan Mattison, MD specializes in Hematology (Internal Medicine) Physician and practices in Madison, Wisconsin. Credentials: MD.
How much does Ryan Mattison, MD prescribe under Medicare Part D? ▼
In 2024, Ryan Mattison, MD wrote 991 Medicare Part D claims totaling $3.0M in drug costs for 95 beneficiaries.
Where is Ryan Mattison, MD located? ▼
Ryan Mattison, MD is located at 600 HIGHLAND AVE, Madison, WI, 53792. Phone: (608) 265-1700.
What is Ryan Mattison, MD's NPI number? ▼
Ryan Mattison, MD's National Provider Identifier (NPI) is 1538184825, issued on 07/13/2006.
Does Ryan Mattison, MD prescribe more brand-name or generic drugs? ▼
Ryan Mattison, MD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $2.9M in brand drug costs.
Does Ryan Mattison, MD prescribe opioids? ▼
Yes, Ryan Mattison, MD had 50 opioid claims in 2024 with an opioid prescribing rate of 5.0%.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,483 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 684 Medicare Part D claims per year.
What drugs does Ryan Mattison, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Ryan Mattison, MD's most frequently prescribed drugs include Acyclovir, Imatinib Mesylate, Jakafi. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ryan Mattison, MD accept Medicare? ▼
Ryan Mattison, MD appears in CMS Medicare data with 991 Part D claims and 95 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ryan Mattison, MD's credentials? ▼
Ryan Mattison, MD's NPI is 1538184825 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.