2026 NPPES data Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician NPI 1801282272 M.D.
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NATHAN RUBALCAVA, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in DENVER, Colorado. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
42
Medicare Part D claims · 18 beneficiaries · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician avg: 128
What the federal data reveals: NATHAN RUBALCAVA, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician ([object Object]) practicing in DENVER, Colorado with a Medicare Part D prescribing footprint of 42 claims across 18 beneficiaries .

What stands out: NATHAN RUBALCAVA, M.D. filed 42 Medicare Part D claims in 2023 across DENVER, Colorado. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

NATHAN RUBALCAVA, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

NATHAN RUBALCAVA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/12/2015

NPI 1801282272

Primary specialty

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Mid-sized

5,062 US NPIs in this specialty

Medicare Part D claims

42 67% vs specialty avg

2023 prescription claims

Specialty avg: 128

Specialty distribution in Colorado

How Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician compares to other specialties among Colorado providers

Colorado providers

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Colorado

1. Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Colorado

Specialty board-certification context

Estimated specialty board-certified rate — Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician ABMS/AOA estimate

Est. board-certified rate (Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician) — ABMS / AOA estimate

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).

NATHAN RUBALCAVA, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider practicing in DENVER, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1801282272. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

NATHAN RUBALCAVA, M.D. appears in the CMS NPPES registry as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider holding M.D. credentials at 2055 N HIGH ST STE 370, DENVER, CO, 80205, with a listed phone of (303) 839-6001. NPI 1801282272 was issued on 04/12/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RUBALCAVA most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 42 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $127 in drug spend, with an opioid prescribing rate of 28.6%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician is a mid-sized specialty nationwide, with 5,062 enrolled providers across 52 states and an average of 128 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

2055 N HIGH ST STE 370
DENVER, CO 80205

Provider Details

NPI 1801282272
Specialty Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Credentials M.D.
Gender Male
NPI Issued 04/12/2015

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

42
Total Claims
$127
Total Drug Cost
18
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
44
Total Day Supply
237
Brand Drug Cost
$0
Generic Drug Cost
$127
Opioid Claims
12 (28.6% rate)

Patient Demographics

Average Patient Age
70.7 years
Avg HCC Risk Score
1.03

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Ondansetron Hcl
15
Ibuprofen
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Overview

How NATHAN RUBALCAVA, M.D. fits within the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician landscape nationally.

5,062
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in US
52
States with Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
128
Avg Claims per Provider

NATHAN RUBALCAVA, M.D.'s 42 claims are below the specialty average of 128.

Nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in Colorado

Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as RUBALCAVA.

Compare Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NATHAN RUBALCAVA, M.D.'s specialty?
NATHAN RUBALCAVA, M.D. specializes in Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician and practices in DENVER, Colorado. Credentials: M.D..
How much does NATHAN RUBALCAVA, M.D. prescribe under Medicare Part D?
In 2023, NATHAN RUBALCAVA, M.D. wrote 42 Medicare Part D claims totaling $127 in drug costs for 18 beneficiaries.
Where is NATHAN RUBALCAVA, M.D. located?
NATHAN RUBALCAVA, M.D. is located at 2055 N HIGH ST STE 370, DENVER, CO, 80205. Phone: (303) 839-6001.
What is NATHAN RUBALCAVA, M.D.'s NPI number?
NATHAN RUBALCAVA, M.D.'s National Provider Identifier (NPI) is 1801282272, issued on 04/12/2015.
Does NATHAN RUBALCAVA, M.D. prescribe opioids?
Yes, NATHAN RUBALCAVA, M.D. had 12 opioid claims in 2023 with an opioid prescribing rate of 28.6%.
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers are there in the US?
There are 5,062 Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers across 52 states in the US. The average Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider writes 128 Medicare Part D claims per year.
What drugs does NATHAN RUBALCAVA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, NATHAN RUBALCAVA, M.D.'s most frequently prescribed drugs include Ondansetron Hcl, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NATHAN RUBALCAVA, M.D. accept Medicare?
NATHAN RUBALCAVA, M.D. appears in CMS Medicare data with 42 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NATHAN RUBALCAVA, M.D.'s credentials?
NATHAN RUBALCAVA, M.D.'s NPI is 1801282272 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

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