2026 NPPES data Family Medicine Physician NPI 1821012998 M.D.
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James Wallwork, M.D.

Family Medicine Physician in Columbia, 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
538
Medicare Part D claims · 30 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

James Wallwork, M.D. filed 538 Medicare Part D claims in 2023 as a Family Medicine Physician in Columbia, Tennessee, prescribing 87% generic.

538
Part D claims, 2023
87%
generic prescribing

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.

James Wallwork, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

538 Top 34% higher than 66% 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%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

James Wallwork, 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).

What does the federal data show about James Wallwork, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/26/2006

NPI 1821012998

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

538 84% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Tennessee

How Family Medicine Physician compares to other specialties among Tennessee providers

Tennessee providers

Family Medicine Physician share within Tennessee

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

Specialty board-certification context

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

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

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

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

James Wallwork, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 1223 HATCHER LN, Columbia, TN, 38401, with a listed phone of (931) 840-4200. NPI 1821012998 was issued on 07/26/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Wallwork 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 538 prescription claims written by this provider, covering 30 Medicare beneficiaries and totaling roughly $32K in drug spend, split 13% brand-name and 87% generic by claim count. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

1223 HATCHER LN
Columbia, TN 38401

Provider Details

NPI 1821012998
Specialty Family Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/26/2006

Brand vs generic prescribing mix · Typical

James Wallwork, M.D. — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 538 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.

538
Total Claims
$32K
Total Drug Cost
30
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
947
Total Day Supply
26,719
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$23K
Generic Drug Cost
$8K
Antibiotic Claims
14

Patient Demographics

Average Patient Age
64.3 years
Avg HCC Risk Score
1.58
Gender Split
57% female / 43% male

Top Prescribed Drugs (Medicare Part D)

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

What James Wallwork, M.D. 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
Metoprolol Tartrate
39
Lisinopril
35
Hydrochlorothiazide
34
Albuterol Sulfate Hfa
Albuterol Sulfate
31
Amlodipine Besylate
30
Meloxicam
21
Furosemide
17
Pregabalin
16
Nitroglycerin
13
Spironolactone
13

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

Family Medicine Physician Overview

How James Wallwork, M.D. fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

James Wallwork, M.D.'s 538 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Tennessee

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Tennessee medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is James Wallwork, M.D.'s specialty?
James Wallwork, M.D. specializes in Family Medicine Physician and practices in Columbia, Tennessee. Credentials: M.D..
How much does James Wallwork, M.D. prescribe under Medicare Part D?
In 2023, James Wallwork, M.D. wrote 538 Medicare Part D claims totaling $32K in drug costs for 30 beneficiaries.
Where is James Wallwork, M.D. located?
James Wallwork, M.D. is located at 1223 HATCHER LN, Columbia, TN, 38401. Phone: (931) 840-4200.
What is James Wallwork, M.D.'s NPI number?
James Wallwork, M.D.'s National Provider Identifier (NPI) is 1821012998, issued on 07/26/2006.
Does James Wallwork, M.D. prescribe more brand-name or generic drugs?
James Wallwork, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $23K in brand drug costs.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does James Wallwork, M.D. prescribe most often?
Based on 2023 Medicare Part D data, James Wallwork, M.D.'s most frequently prescribed drugs include Metoprolol Tartrate, Lisinopril, Hydrochlorothiazide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Wallwork, M.D. accept Medicare?
James Wallwork, M.D. appears in CMS Medicare data with 538 Part D claims and 30 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Wallwork, M.D.'s credentials?
James Wallwork, M.D.'s NPI is 1821012998 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