NPI registry status
Active
2026 NPPES data Certified Registered Nurse Anesthetist NPI 1669447637 CRNP MSN
Verify on CMS → Mark Ryan, CRNP MSN
Certified Registered Nurse Anesthetist in Laurel, Delaware.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 62,644 in Certified Registered Nurse Anesthetist, 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
512
Medicare Part D claims · 319 beneficiaries · Certified Registered Nurse Anesthetist avg: 282
What the federal data shows
Mark Ryan, CRNP MSN filed 512 Medicare Part D claims in 2023 as a Certified Registered Nurse Anesthetist in Laurel, Delaware.
- 512
- Part D claims, 2023
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.
Mark Ryan, CRNP MSN's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
512 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Mark Ryan, CRNP MSN?
Quality data not reportedPrimary specialty
Certified Registered Nurse Anesthetist
Medicare Part D claims
512 82% vs specialty avg
Specialty distribution in Delaware
How Certified Registered Nurse Anesthetist compares to other specialties among Delaware 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 Certified Registered Nurse Anesthetist. 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).
Mark Ryan, CRNP MSN appears in the CMS NPPES registry as a Certified Registered Nurse Anesthetist provider holding CRNP MSN credentials at 30549 SUSSEX HWY, Laurel, DE, 19956, with a listed phone of (302) 715-5214. NPI 1669447637 was issued on 02/22/2006.
Medicare Part D records for calendar year 2023 show 512 prescription claims written by this provider, covering 319 Medicare beneficiaries and totaling roughly $6K in drug spend.
Certified Registered Nurse Anesthetist is a high-volume specialty nationwide, with 62,644 enrolled providers across 55 states and an average of 282 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1669447637 |
|---|---|
| Specialty | Certified Registered Nurse Anesthetist |
| Credentials | CRNP MSN |
| Gender | Male |
| NPI Issued | 02/22/2006 |
Hospital and facility affiliations
Facilities where Mark Ryan, CRNP MSN 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.
Tidalhealth Physician Network, Inc.
Seaford, DE
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
512
Total Claims
$6K
Total Drug Cost
319
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 518
- Total Day Supply
- 6,347
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 230
Patient Demographics
- Average Patient Age
- 70.7 years
- Avg HCC Risk Score
- 1.13
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 57, 65-74: 156, 75-84: 86, 85+: 20
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Ryan, CRNP MSN prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azithromycin
Azithromycin
57 claims
- Mupirocin
Mupirocin
46 claims
- Prednisone
Prednisone
42 claims
- Amoxicillin
Amoxicillin
33 claims
- Nitrofurantoin Mon…
Nitrofurantoin Mono-Macro
33 claims
- Cephalexin
Cephalexin
31 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
30 claims
- Fluticasone Propio…
Fluticasone Propionate
27 claims
| Drug | Claims |
|---|---|
| Azithromycin | 57 |
| Mupirocin | 46 |
| Prednisone | 42 |
| Amoxicillin | 33 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 33 |
| Cephalexin | 31 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 30 |
| Fluticasone Propionate | 27 |
| Clindamycin Hcl | 25 |
| Ondansetron Odt Ondansetron | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Certified Registered Nurse Anesthetist in DE →
All providers in Delaware →
Compare specialties →
Certified Registered Nurse Anesthetist Overview
How Mark Ryan, CRNP MSN fits within the Certified Registered Nurse Anesthetist landscape nationally.
62,644
Certified Registered Nurse Anesthetist Providers in US
55
States with Certified Registered Nurse Anesthetist
282
Avg Claims per Provider
Mark Ryan, CRNP MSN's 512 claims are above the specialty average of 282.
Nearby Certified Registered Nurse Anesthetist Providers in Delaware
Other clinicians with the same primary specialty enrolled in Delaware, drawn from the same CMS NPPES roster as Ryan.
Dr. Denita Adams
CRNA
Dover, DE
Dr. Joan Adams
CRNA
Newark, DE
Maria Agard
New Castle, DE
Dr. Jennifer Agster
CRNA
Wilmington, DE
Dr. Berniece Ajavon
CRNA
Newark, DE
Compare Certified Registered Nurse Anesthetist nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Delaware medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Certified Registered Nurse Anesthetist peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Mark Ryan, CRNP MSN's specialty? ▼
Mark Ryan, CRNP MSN specializes in Certified Registered Nurse Anesthetist and practices in Laurel, Delaware. Credentials: CRNP MSN.
How much does Mark Ryan, CRNP MSN prescribe under Medicare Part D? ▼
In 2023, Mark Ryan, CRNP MSN wrote 512 Medicare Part D claims totaling $6K in drug costs for 319 beneficiaries.
Where is Mark Ryan, CRNP MSN located? ▼
Mark Ryan, CRNP MSN is located at 30549 SUSSEX HWY, Laurel, DE, 19956. Phone: (302) 715-5214.
What is Mark Ryan, CRNP MSN's NPI number? ▼
Mark Ryan, CRNP MSN's National Provider Identifier (NPI) is 1669447637, issued on 02/22/2006.
How many Certified Registered Nurse Anesthetist providers are there in the US? ▼
There are 62,644 Certified Registered Nurse Anesthetist providers across 55 states in the US. The average Certified Registered Nurse Anesthetist provider writes 282 Medicare Part D claims per year.
What drugs does Mark Ryan, CRNP MSN prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Ryan, CRNP MSN's most frequently prescribed drugs include Azithromycin, Mupirocin, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Ryan, CRNP MSN accept Medicare? ▼
Mark Ryan, CRNP MSN appears in CMS Medicare data with 512 Part D claims and 319 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Ryan, CRNP MSN's credentials? ▼
Mark Ryan, CRNP MSN's NPI is 1669447637 with credentials CRNP MSN. 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 (2023). 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 April 2026 (NPPES) / 2023 (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 May 2026.