NPI registry status
Active
2026 NPPES data Vascular Surgery Physician NPI 1770610735 M.D.
Verify on CMS → Thomas Rehring, M.D.
Vascular Surgery Physician in Denver, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,227 in Vascular 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
193
Medicare Part D claims · 74 beneficiaries · Vascular Surgery Physician avg: 205
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Thomas Rehring, M.D. filed 193 Medicare Part D claims in 2023 as a Vascular Surgery Physician in Denver, Colorado, prescribing 89% generic.
- 193
- Part D claims, 2023
- 89%
- generic prescribing
- 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.
Thomas Rehring, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
193 35th percentile higher than 35% 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)
Thomas Rehring, M.D. 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 Thomas Rehring, M.D.?
Quality data not reportedPrimary specialty
Vascular Surgery Physician
Medicare Part D claims
193 6% vs specialty avg
Specialty distribution in Colorado
How Vascular Surgery Physician compares to other specialties among Colorado 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 Vascular 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).
Thomas Rehring, M.D. appears in the CMS NPPES registry as a Vascular Surgery Physician provider holding M.D. credentials at 2045 N FRANKLIN ST FL 3, Denver, CO, 80205, with a listed phone of (303) 338-4545. NPI 1770610735 was issued on 02/27/2007.
Medicare Part D records for calendar year 2023 show 193 prescription claims written by this provider, covering 74 Medicare beneficiaries and totaling roughly $10K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 6.7%.
Vascular Surgery Physician is a narrow specialty nationwide, with 4,227 enrolled providers across 53 states and an average of 205 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 | 1770610735 |
|---|---|
| Specialty | Vascular Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/27/2007 |
Hospital and facility affiliations
Facilities where Thomas Rehring, 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.
Colorado Permanente Medical Group PC
Denver, CO
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 · Typical
Thomas Rehring, M.D. - brand share 11.0%
Vascular Surgery Physician average
11% brand-name claims vs 89% generic, on 193 2023 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 2023.
193
Total Claims
$10K
Total Drug Cost
74
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 394
- Total Day Supply
- 10,384
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $5K
- Generic Drug Cost
- $5K
- Opioid Claims
- 13 (6.7% rate)
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 38% female / 62% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thomas Rehring, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pentoxifylline
Pentoxifylline
39 claims
- Amoxicillin
Amoxicillin
22 claims
- Clopidogrel
Clopidogrel
20 claims
- Atorvastatin Calcium
Atorvastatin Calcium
16 claims
- Pradaxa
Pradaxa
16 claims
- Bupropion Xl 12
Bupropion Xl
12 claims
| Drug | Claims |
|---|---|
| Pentoxifylline | 39 |
| Amoxicillin | 22 |
| Clopidogrel Clopidogrel Bisulfate | 20 |
| Atorvastatin Calcium | 16 |
| Pradaxa Dabigatran Etexilate Mesylate | 16 |
| Bupropion Xl Bupropion Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Vascular Surgery Physician Overview
How Thomas Rehring, M.D. fits within the Vascular Surgery Physician landscape nationally.
4,227
Vascular Surgery Physician Providers in US
53
States with Vascular Surgery Physician
205
Avg Claims per Provider
Thomas Rehring, M.D.'s 193 claims are below the specialty average of 205.
Nearby Vascular Surgery Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Rehring.
Dr. Naveen Balasundaram
M.D.
Colorado Springs, CO
Dr. Lisa Bennett
M.D.
Denver, CO
Charles Brantigan
Aurora, CO
Dr. Brad Case
MD
Grand Junction, CO
Dr. Timothy Chilton
DO
Denver, CO
Compare Vascular 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 Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Vascular 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Colorado
Frequently Asked Questions
What is Thomas Rehring, M.D.'s specialty? ▼
Thomas Rehring, M.D. specializes in Vascular Surgery Physician and practices in Denver, Colorado. Credentials: M.D..
How much does Thomas Rehring, M.D. prescribe under Medicare Part D? ▼
In 2023, Thomas Rehring, M.D. wrote 193 Medicare Part D claims totaling $10K in drug costs for 74 beneficiaries.
Where is Thomas Rehring, M.D. located? ▼
Thomas Rehring, M.D. is located at 2045 N FRANKLIN ST FL 3, Denver, CO, 80205. Phone: (303) 338-4545.
What is Thomas Rehring, M.D.'s NPI number? ▼
Thomas Rehring, M.D.'s National Provider Identifier (NPI) is 1770610735, issued on 02/27/2007.
Does Thomas Rehring, M.D. prescribe more brand-name or generic drugs? ▼
Thomas Rehring, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $5K in brand drug costs.
Does Thomas Rehring, M.D. prescribe opioids? ▼
Yes, Thomas Rehring, M.D. had 13 opioid claims in 2023 with an opioid prescribing rate of 6.7%.
How many Vascular Surgery Physician providers are there in the US? ▼
There are 4,227 Vascular Surgery Physician providers across 53 states in the US. The average Vascular Surgery Physician provider writes 205 Medicare Part D claims per year.
What drugs does Thomas Rehring, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Thomas Rehring, M.D.'s most frequently prescribed drugs include Pentoxifylline, Amoxicillin, Clopidogrel. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Rehring, M.D. accept Medicare? ▼
Thomas Rehring, M.D. appears in CMS Medicare data with 193 Part D claims and 74 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Rehring, M.D.'s credentials? ▼
Thomas Rehring, M.D.'s NPI is 1770610735 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
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.