2026 NPPES data Obstetrics & Gynecology Physician NPI 1194221010 MD
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BRANDON HAYS, MD

Obstetrics & Gynecology 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
58
Medicare Part D claims · 35 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Industry payments
$398.63
21 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BRANDON HAYS, MD filed 58 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in KNOXVILLE, Tennessee.

58
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.

BRANDON HAYS, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

58 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

BRANDON HAYS, 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).

What does the federal data show about BRANDON HAYS, MD?

Quality data not reported

NPI registry status

Active

Issued 03/30/2018

NPI 1194221010

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

58 68% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Tennessee

How Obstetrics & Gynecology Physician compares to other specialties among Tennessee providers

Tennessee providers

Obstetrics & Gynecology Physician share within Tennessee

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

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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).

BRANDON HAYS, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 9430 PARK WEST BLVD STE 320, KNOXVILLE, TN, 37923, with a listed phone of (865) 769-4444. NPI 1194221010 was issued on 03/30/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HAYS 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 58 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $3K in drug spend, with an opioid prescribing rate of 34.5%. 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.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

9430 PARK WEST BLVD STE 320
KNOXVILLE, TN 37923

Provider Details

NPI 1194221010
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Male
NPI Issued 03/30/2018

Hospital and facility affiliations

Facilities where BRANDON HAYS, 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.

GENERATIONS OBGYN,P.C.
KNOXVILLE, TN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for BRANDON HAYS, MD. Source: openpaymentsdata.cms.gov.

Total received

$399

Largest payer

Sumitomo Pharma America, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Medicare Part D Prescribing Data

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

58
Total Claims
$3K
Total Drug Cost
35
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
68
Total Day Supply
1,057
Generic Drug Cost
$696
Opioid Claims
20 (34.5% rate)

Patient Demographics

Average Patient Age
68.5 years
Avg HCC Risk Score
0.87
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Oxycodone Hcl
20

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

Obstetrics & Gynecology Physician Overview

How BRANDON HAYS, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

BRANDON HAYS, MD's 58 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Tennessee

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

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BRANDON HAYS, MD's specialty?
BRANDON HAYS, MD specializes in Obstetrics & Gynecology Physician and practices in KNOXVILLE, Tennessee. Credentials: MD.
How much does BRANDON HAYS, MD prescribe under Medicare Part D?
In 2023, BRANDON HAYS, MD wrote 58 Medicare Part D claims totaling $3K in drug costs for 35 beneficiaries.
Where is BRANDON HAYS, MD located?
BRANDON HAYS, MD is located at 9430 PARK WEST BLVD STE 320, KNOXVILLE, TN, 37923. Phone: (865) 769-4444.
What is BRANDON HAYS, MD's NPI number?
BRANDON HAYS, MD's National Provider Identifier (NPI) is 1194221010, issued on 03/30/2018.
Does BRANDON HAYS, MD prescribe opioids?
Yes, BRANDON HAYS, MD had 20 opioid claims in 2023 with an opioid prescribing rate of 34.5%.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does BRANDON HAYS, MD prescribe most often?
Based on 2023 Medicare Part D data, BRANDON HAYS, MD's most frequently prescribed drugs include Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRANDON HAYS, MD accept Medicare?
BRANDON HAYS, MD appears in CMS Medicare data with 58 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRANDON HAYS, MD's credentials?
BRANDON HAYS, MD's NPI is 1194221010 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