2026 NPPES data Hospitalist Physician NPI 1821404435 MD
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ROY FERRAIUOLO, MD

Hospitalist Physician in KNOXVILLE, Tennessee. 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
914
Medicare Part D claims · 400 beneficiaries · Hospitalist Physician avg: 888
What the federal data reveals: ROY FERRAIUOLO, MD is a Hospitalist Physician ([object Object]) practicing in KNOXVILLE, Tennessee with a Medicare Part D prescribing footprint of 914 claims across 400 beneficiaries .

What stands out: ROY FERRAIUOLO, MD filed 914 Medicare Part D claims in 2023 across KNOXVILLE, Tennessee. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ROY FERRAIUOLO, 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).

ROY FERRAIUOLO, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/02/2014

NPI 1821404435

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

914 3% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Tennessee

How Hospitalist Physician compares to other specialties among Tennessee providers

Tennessee providers

Hospitalist Physician share within Tennessee

1. Hospitalist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospitalist Physician share within Tennessee

Specialty board-certification context

Estimated specialty board-certified rate — Hospitalist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hospitalist Physician ABMS/AOA estimate

Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hospitalist 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).

ROY FERRAIUOLO, MD is a Hospitalist Physician provider practicing in KNOXVILLE, Tennessee, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1821404435. 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.

ROY FERRAIUOLO, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 1924 ALCOA HWY # U-67, KNOXVILLE, TN, 37920, with a listed phone of (865) 305-9350. NPI 1821404435 was issued on 07/02/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FERRAIUOLO 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 914 prescription claims written by this provider, covering 400 Medicare beneficiaries and totaling roughly $11K in drug spend, with an opioid prescribing rate of 9.8%. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

1924 ALCOA HWY # U-67
KNOXVILLE, TN 37920

Provider Details

NPI 1821404435
Specialty Hospitalist Physician
Credentials MD
Gender Male
NPI Issued 07/02/2014

Hospital and facility affiliations

Facilities where ROY FERRAIUOLO, 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.

ISLAND MEDICAL ALABAMA LLC
CULLMAN, AL

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.

914
Total Claims
$11K
Total Drug Cost
400
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
915
Total Day Supply
7,835
Generic Drug Cost
$8K
Opioid Claims
90 (9.8% rate)
Antibiotic Claims
221

Patient Demographics

Average Patient Age
68.5 years
Avg HCC Risk Score
1.74
Gender Split
64% female / 36% male
Age Distribution
<65: 125, 65-74: 130, 75-84: 102, 85+: 43

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
110
Naproxen
100
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
76
Methocarbamol
70
Prednisone
47
Dicyclomine Hcl
41
Cephalexin
36
Ondansetron Odt
Ondansetron
27
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
25
Azithromycin
23

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

Hospitalist Physician Overview

How ROY FERRAIUOLO, MD fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

ROY FERRAIUOLO, MD's 914 claims are above the specialty average of 888.

Nearby Hospitalist Physician Providers in Tennessee

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

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROY FERRAIUOLO, MD's specialty?
ROY FERRAIUOLO, MD specializes in Hospitalist Physician and practices in KNOXVILLE, Tennessee. Credentials: MD.
How much does ROY FERRAIUOLO, MD prescribe under Medicare Part D?
In 2023, ROY FERRAIUOLO, MD wrote 914 Medicare Part D claims totaling $11K in drug costs for 400 beneficiaries.
Where is ROY FERRAIUOLO, MD located?
ROY FERRAIUOLO, MD is located at 1924 ALCOA HWY # U-67, KNOXVILLE, TN, 37920. Phone: (865) 305-9350.
What is ROY FERRAIUOLO, MD's NPI number?
ROY FERRAIUOLO, MD's National Provider Identifier (NPI) is 1821404435, issued on 07/02/2014.
Does ROY FERRAIUOLO, MD prescribe opioids?
Yes, ROY FERRAIUOLO, MD had 90 opioid claims in 2023 with an opioid prescribing rate of 9.8%.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does ROY FERRAIUOLO, MD prescribe most often?
Based on 2023 Medicare Part D data, ROY FERRAIUOLO, MD's most frequently prescribed drugs include Ondansetron Hcl, Naproxen, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROY FERRAIUOLO, MD accept Medicare?
ROY FERRAIUOLO, MD appears in CMS Medicare data with 914 Part D claims and 400 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROY FERRAIUOLO, MD's credentials?
ROY FERRAIUOLO, MD's NPI is 1821404435 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

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