NPI registry status
Active
2026 NPPES data Neurological Surgery Physician NPI 1619925559 M.D.
Verify on CMS → Terrence Ryan, M.D.
Neurological Surgery Physician in Columbia, 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 8,100 in Neurological Surgery 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
318
Medicare Part D claims · 104 beneficiaries · Neurological Surgery Physician avg: 181
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Terrence Ryan, M.D. filed 318 Medicare Part D claims in 2023 as a Neurological Surgery Physician in Columbia, Missouri.
- 318
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Terrence Ryan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
318 Top 43% higher than 57% 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
✓
Board certification likely (heuristic, not verified)
Terrence Ryan, M.D. 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 Terrence Ryan, M.D.?
Quality data not reportedPrimary specialty
Neurological Surgery Physician
Medicare Part D claims
318 76% vs specialty avg
Specialty distribution in Missouri
How Neurological Surgery 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 Neurological Surgery 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).
Terrence Ryan, M.D. appears in the CMS NPPES registry as a Neurological Surgery Physician provider holding M.D. credentials at 1605 E BROADWAY, Columbia, MO, 65201, with a listed phone of (573) 815-4242. NPI 1619925559 was issued on 05/04/2006.
Medicare Part D records for calendar year 2023 show 318 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $6K in drug spend, with an opioid prescribing rate of 27.4%.
Neurological Surgery Physician is a mid-sized specialty nationwide, with 8,100 enrolled providers across 53 states and an average of 181 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 | 1619925559 |
|---|---|
| Specialty | Neurological Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/04/2006 |
Hospital and facility affiliations
Facilities where Terrence Ryan, M.D. 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.
Boone Physician Services LLC
Columbia, MO
Heartland Regional Medical Center
Saint Joseph, 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
318
Total Claims
$6K
Total Drug Cost
104
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 429
- Total Day Supply
- 9,433
- Brand Drug Cost
- $0
- Generic Drug Cost
- $6K
- Opioid Claims
- 87 (27.4% rate)
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 69.1 years
- Avg HCC Risk Score
- 1.18
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 26, 65-74: 51, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Terrence Ryan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
69 claims
- Gabapentin
Gabapentin
60 claims
- Diazepam
Diazepam
31 claims
- Methylprednisolone 20
Methylprednisolone
20 claims
- Dexamethasone 15
Dexamethasone
15 claims
- Levetiracetam 15
Levetiracetam
15 claims
| Drug | Claims |
|---|---|
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 69 |
| Gabapentin | 60 |
| Diazepam | 31 |
| Methylprednisolone | 20 |
| Dexamethasone | 15 |
| Levetiracetam | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurological Surgery Physician Overview
How Terrence Ryan, M.D. fits within the Neurological Surgery Physician landscape nationally.
8,100
Neurological Surgery Physician Providers in US
53
States with Neurological Surgery Physician
181
Avg Claims per Provider
Terrence Ryan, M.D.'s 318 claims are above the specialty average of 181.
Nearby Neurological Surgery Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Ryan.
Dr. Daniel Aaronson
M.D.
Saint Louis, MO
Dr. Andrew Abumoussa
MD
Lees Summit, MO
Dr. Abudumijiti Aibaidula
MD
Columbia, MO
Dr. Asad Akhter
MD
Saint Louis, MO
Dr. Faisal Albanna
M.D.
Saint Louis, MO
Compare Neurological Surgery Physician 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neurological Surgery Physician 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 Terrence Ryan, M.D.'s specialty? ▼
Terrence Ryan, M.D. specializes in Neurological Surgery Physician and practices in Columbia, Missouri. Credentials: M.D..
How much does Terrence Ryan, M.D. prescribe under Medicare Part D? ▼
In 2023, Terrence Ryan, M.D. wrote 318 Medicare Part D claims totaling $6K in drug costs for 104 beneficiaries.
Where is Terrence Ryan, M.D. located? ▼
Terrence Ryan, M.D. is located at 1605 E BROADWAY, Columbia, MO, 65201. Phone: (573) 815-4242.
What is Terrence Ryan, M.D.'s NPI number? ▼
Terrence Ryan, M.D.'s National Provider Identifier (NPI) is 1619925559, issued on 05/04/2006.
Does Terrence Ryan, M.D. prescribe opioids? ▼
Yes, Terrence Ryan, M.D. had 87 opioid claims in 2023 with an opioid prescribing rate of 27.4%.
How many Neurological Surgery Physician providers are there in the US? ▼
There are 8,100 Neurological Surgery Physician providers across 53 states in the US. The average Neurological Surgery Physician provider writes 181 Medicare Part D claims per year.
What drugs does Terrence Ryan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Terrence Ryan, M.D.'s most frequently prescribed drugs include Oxycodone-Acetaminophen, Gabapentin, Diazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Terrence Ryan, M.D. accept Medicare? ▼
Terrence Ryan, M.D. appears in CMS Medicare data with 318 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Terrence Ryan, M.D.'s credentials? ▼
Terrence Ryan, M.D.'s NPI is 1619925559 with credentials M.D.. 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
Compiled from official public sources by the PlainDoctor editorial team.