2026 NPPES data Pain Medicine (Anesthesiology) Physician NPI 1144360785 MD., DAAPM
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CHARLES WALKER, MD., DAAPM

Pain Medicine (Anesthesiology) Physician in PARIS, 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
4K
Medicare Part D claims · 152 beneficiaries · Pain Medicine (Anesthesiology) Physician avg: 2K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$303.57
19 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CHARLES WALKER, MD., DAAPM filed 4,163 Medicare Part D claims in 2023 as a Pain Medicine (Anesthesiology) Physician in PARIS, Tennessee, prescribing 93% generic.

4K
Part D claims, 2023
93%
generic prescribing
$303.57
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.

CHARLES WALKER, MD., DAAPM's Medicare Part D volume vs every U.S. prescriber

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

4,163 Top 8% higher than 92% 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)

CHARLES WALKER, MD., DAAPM 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 CHARLES WALKER, MD., DAAPM?

Quality data not reported

NPI registry status

Active

Issued 02/06/2007

NPI 1144360785

Primary specialty

Pain Medicine (Anesthesiology) Physician

Niche

4,020 US NPIs in this specialty

Medicare Part D claims

4,163 151% vs specialty avg

2023 prescription claims

Specialty avg: 1,657

Specialty distribution in Tennessee

How Pain Medicine (Anesthesiology) Physician compares to other specialties among Tennessee providers

Tennessee providers

Pain Medicine (Anesthesiology) Physician share within Tennessee

1. Pain Medicine (Anesthesiology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pain Medicine (Anesthesiology) Physician share within Tennessee

Specialty board-certification context

Estimated specialty board-certified rate — Pain Medicine (Anesthesiology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pain Medicine (Anesthesiology) Physician ABMS/AOA estimate

Est. board-certified rate (Pain Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pain Medicine (Anesthesiology) 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).

CHARLES WALKER, MD., DAAPM appears in the CMS NPPES registry as a Pain Medicine (Anesthesiology) Physician provider holding MD., DAAPM credentials at 707 E WOOD ST, PARIS, TN, 38242, with a listed phone of (731) 644-0144. NPI 1144360785 was issued on 02/06/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WALKER 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 4,163 prescription claims written by this provider, covering 152 Medicare beneficiaries and totaling roughly $481K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 46.4%. 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.

Pain Medicine (Anesthesiology) Physician is a narrow specialty nationwide, with 4,020 enrolled providers across 53 states and an average of 1,657 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

707 E WOOD ST
PARIS, TN 38242

Provider Details

NPI 1144360785
Specialty Pain Medicine (Anesthesiology) Physician
Credentials MD., DAAPM
Gender Male
NPI Issued 02/06/2007

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 CHARLES WALKER, MD., DAAPM. Source: openpaymentsdata.cms.gov.

Total received

$304

Largest payer

Collegium Pharmaceutical, 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

CHARLES WALKER, MD., DAAPM — brand share 7.0%
Specialty average (est.)

7% brand-name claims vs 93% generic, on 4,163 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.

4,163
Total Claims
$481K
Total Drug Cost
152
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,646
Total Day Supply
132,750
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$301K
Generic Drug Cost
$180K
Opioid Claims
1,933 (46.4% rate)

Patient Demographics

Average Patient Age
68.3 years
Avg HCC Risk Score
1.48
Gender Split
66% female / 34% male
Age Distribution
<65: 51, 65-74: 62, 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 CHARLES WALKER, MD., DAAPM 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
Tizanidine Hcl
553
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
377
Oxycodone Hcl
367
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
312
Gabapentin
308
Morphine Sulfate Er
Morphine Sulfate
275
Fentanyl
217
Pregabalin
175
Trazodone Hcl
119
Oxycontin
Oxycodone Hcl
109

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

Pain Medicine (Anesthesiology) Physician Overview

How CHARLES WALKER, MD., DAAPM fits within the Pain Medicine (Anesthesiology) Physician landscape nationally.

4,020
Pain Medicine (Anesthesiology) Physician Providers in US
53
States with Pain Medicine (Anesthesiology) Physician
1,657
Avg Claims per Provider

CHARLES WALKER, MD., DAAPM's 4,163 claims are above the specialty average of 1,657.

Nearby Pain Medicine (Anesthesiology) Physician Providers in Tennessee

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

Compare Pain Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHARLES WALKER, MD., DAAPM's specialty?
CHARLES WALKER, MD., DAAPM specializes in Pain Medicine (Anesthesiology) Physician and practices in PARIS, Tennessee. Credentials: MD., DAAPM.
How much does CHARLES WALKER, MD., DAAPM prescribe under Medicare Part D?
In 2023, CHARLES WALKER, MD., DAAPM wrote 4,163 Medicare Part D claims totaling $481K in drug costs for 152 beneficiaries.
Where is CHARLES WALKER, MD., DAAPM located?
CHARLES WALKER, MD., DAAPM is located at 707 E WOOD ST, PARIS, TN, 38242. Phone: (731) 644-0144.
What is CHARLES WALKER, MD., DAAPM's NPI number?
CHARLES WALKER, MD., DAAPM's National Provider Identifier (NPI) is 1144360785, issued on 02/06/2007.
Does CHARLES WALKER, MD., DAAPM prescribe more brand-name or generic drugs?
CHARLES WALKER, MD., DAAPM's prescribing is 7% brand-name and 93% generic drugs by claim count, with $301K in brand drug costs.
Does CHARLES WALKER, MD., DAAPM prescribe opioids?
Yes, CHARLES WALKER, MD., DAAPM had 1,933 opioid claims in 2023 with an opioid prescribing rate of 46.4%.
How many Pain Medicine (Anesthesiology) Physician providers are there in the US?
There are 4,020 Pain Medicine (Anesthesiology) Physician providers across 53 states in the US. The average Pain Medicine (Anesthesiology) Physician provider writes 1,657 Medicare Part D claims per year.
What drugs does CHARLES WALKER, MD., DAAPM prescribe most often?
Based on 2023 Medicare Part D data, CHARLES WALKER, MD., DAAPM's most frequently prescribed drugs include Tizanidine Hcl, Hydrocodone-Acetaminophen, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES WALKER, MD., DAAPM accept Medicare?
CHARLES WALKER, MD., DAAPM appears in CMS Medicare data with 4,163 Part D claims and 152 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES WALKER, MD., DAAPM's credentials?
CHARLES WALKER, MD., DAAPM's NPI is 1144360785 with credentials MD., DAAPM. 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