2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1639385412 DO
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CHADWICK WALTERS, DO

Physical Medicine & Rehabilitation Physician in LOUISVILLE, Kentucky. 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
12K
Medicare Part D claims · 200 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$14.67
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CHADWICK WALTERS, DO filed 12,186 Medicare Part D claims in 2023 as a Physical Medicine & Rehabilitation Physician in LOUISVILLE, Kentucky, prescribing 92% generic.

12K
Part D claims, 2023
92%
generic prescribing
$14.67
industry payments (Sunshine Act)

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.

CHADWICK WALTERS, DO's Medicare Part D volume vs every U.S. prescriber

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

12,186 Top 2% higher than 98% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

CHADWICK WALTERS, DO 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).

What does the federal data show about CHADWICK WALTERS, DO?

Quality data not reported

NPI registry status

Active

Issued 05/16/2007

NPI 1639385412

Primary specialty

Physical Medicine & Rehabilitation Physician

Mid-sized

15,306 US NPIs in this specialty

Medicare Part D claims

12,186 1460% vs specialty avg

2023 prescription claims

Specialty avg: 781

Specialty distribution in Kentucky

How Physical Medicine & Rehabilitation Physician compares to other specialties among Kentucky providers

Kentucky providers

Physical Medicine & Rehabilitation Physician share within Kentucky

1. Physical Medicine & Rehabilitation Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physical Medicine & Rehabilitation Physician share within Kentucky

Specialty board-certification context

Estimated specialty board-certified rate — Physical Medicine & Rehabilitation Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Physical Medicine & Rehabilitation Physician ABMS/AOA estimate

Est. board-certified rate (Physical Medicine & Rehabilitation Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physical Medicine & Rehabilitation 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).

CHADWICK WALTERS, DO appears in the CMS NPPES registry as a Physical Medicine & Rehabilitation Physician provider holding DO credentials at 4400 BRECKENRIDGE LN, LOUISVILLE, KY, 40218, with a listed phone of (502) 491-9590. NPI 1639385412 was issued on 05/16/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WALTERS 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 12,186 prescription claims written by this provider, covering 200 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 2.6%. 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.

Physical Medicine & Rehabilitation Physician is a mid-sized specialty nationwide, with 15,306 enrolled providers across 54 states and an average of 781 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

4400 BRECKENRIDGE LN
LOUISVILLE, KY 40218

Provider Details

NPI 1639385412
Specialty Physical Medicine & Rehabilitation Physician
Credentials DO
Gender Male
NPI Issued 05/16/2007

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 CHADWICK WALTERS, DO. Source: openpaymentsdata.cms.gov.

Total received

$15

Largest payer

ABBVIE 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.

Brand vs generic prescribing mix · Generic-heavy

CHADWICK WALTERS, DO — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 12,186 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.

12,186
Total Claims
$1.1M
Total Drug Cost
200
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
13,018
Total Day Supply
359,141
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$665K
Generic Drug Cost
$462K
Opioid Claims
319 (2.6% rate)
Antibiotic Claims
72

Patient Demographics

Average Patient Age
52.6 years
Avg HCC Risk Score
1.26
Gender Split
35% female / 66% male
Age Distribution
<65: 164, 65-74: 34, 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 CHADWICK WALTERS, DO prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
457
Tamsulosin Hcl
368
Propranolol Hcl
347
Omeprazole
332
Escitalopram Oxalate
299
Trazodone Hcl
289
Lisinopril
276
Pantoprazole Sodium
256
Levothyroxine Sodium
240
Levetiracetam
218

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

Physical Medicine & Rehabilitation Physician Overview

How CHADWICK WALTERS, DO fits within the Physical Medicine & Rehabilitation Physician landscape nationally.

15,306
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
781
Avg Claims per Provider

CHADWICK WALTERS, DO's 12,186 claims are above the specialty average of 781.

Nearby Physical Medicine & Rehabilitation Physician Providers in Kentucky

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

Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHADWICK WALTERS, DO's specialty?
CHADWICK WALTERS, DO specializes in Physical Medicine & Rehabilitation Physician and practices in LOUISVILLE, Kentucky. Credentials: DO.
How much does CHADWICK WALTERS, DO prescribe under Medicare Part D?
In 2023, CHADWICK WALTERS, DO wrote 12,186 Medicare Part D claims totaling $1.1M in drug costs for 200 beneficiaries.
Where is CHADWICK WALTERS, DO located?
CHADWICK WALTERS, DO is located at 4400 BRECKENRIDGE LN, LOUISVILLE, KY, 40218. Phone: (502) 491-9590.
What is CHADWICK WALTERS, DO's NPI number?
CHADWICK WALTERS, DO's National Provider Identifier (NPI) is 1639385412, issued on 05/16/2007.
Does CHADWICK WALTERS, DO prescribe more brand-name or generic drugs?
CHADWICK WALTERS, DO's prescribing is 8% brand-name and 92% generic drugs by claim count, with $665K in brand drug costs.
Does CHADWICK WALTERS, DO prescribe opioids?
Yes, CHADWICK WALTERS, DO had 319 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US?
There are 15,306 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 781 Medicare Part D claims per year.
What drugs does CHADWICK WALTERS, DO prescribe most often?
Based on 2023 Medicare Part D data, CHADWICK WALTERS, DO's most frequently prescribed drugs include Atorvastatin Calcium, Tamsulosin Hcl, Propranolol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHADWICK WALTERS, DO accept Medicare?
CHADWICK WALTERS, DO appears in CMS Medicare data with 12,186 Part D claims and 200 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHADWICK WALTERS, DO's credentials?
CHADWICK WALTERS, DO's NPI is 1639385412 with credentials DO. 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