2026 NPPES data Internal Medicine Physician NPI 1730151481 M.D.
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HELEN JOHNSON-WALL, M.D.

Internal Medicine Physician in SENECA, South Carolina. 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
1K
Medicare Part D claims · 273 beneficiaries · Internal Medicine Physician avg: 3K
Industry payments
$132.5
6 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

HELEN JOHNSON-WALL, M.D. filed 1,311 Medicare Part D claims in 2023 as a Internal Medicine Physician in SENECA, South Carolina.

1K
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.

HELEN JOHNSON-WALL, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

1,311 Top 21% higher than 79% 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%). This entry sits in this band. 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)

HELEN JOHNSON-WALL, M.D. 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 HELEN JOHNSON-WALL, M.D.?

Quality data not reported

NPI registry status

Active

Issued 02/06/2006

NPI 1730151481

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,311 52% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in South Carolina

How Internal Medicine Physician compares to other specialties among South Carolina providers

South Carolina providers

Internal Medicine Physician share within South Carolina

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

Specialty board-certification context

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

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

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

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

HELEN JOHNSON-WALL, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 301 MEMORIAL DR STE F, SENECA, SC, 29672, with a listed phone of (864) 885-7758. NPI 1730151481 was issued on 02/06/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOHNSON-WALL 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 1,311 prescription claims written by this provider, covering 273 Medicare beneficiaries and totaling roughly $240K in drug spend, with an opioid prescribing rate of 2.4%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

301 MEMORIAL DR STE F
SENECA, SC 29672

Provider Details

NPI 1730151481
Specialty Internal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 02/06/2006

Hospital and facility affiliations

Facilities where HELEN JOHNSON-WALL, M.D. 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.

OCONEE KIDNEY CENTER LLC
SENECA, SC

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 HELEN JOHNSON-WALL, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$133

Largest payer

AstraZeneca Pharmaceuticals LP

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.

1,311
Total Claims
$240K
Total Drug Cost
273
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,884
Total Day Supply
83,931
Generic Drug Cost
$28K
Opioid Claims
32 (2.4% rate)
Antibiotic Claims
43

Patient Demographics

Average Patient Age
70.7 years
Avg HCC Risk Score
3.92
Gender Split
55% female / 45% male
Age Distribution
<65: 63, 65-74: 100, 75-84: 86, 85+: 24

Top Prescribed Drugs (Medicare Part D)

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

What HELEN JOHNSON-WALL, 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
Furosemide
136
Amlodipine Besylate
57
Calcitriol
56
Losartan Potassium
53
Omeprazole
37
Chlorthalidone
30
Rybelsus
Semaglutide
30
Doxazosin Mesylate
29
Gabapentin
28
Lisinopril
28

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

Internal Medicine Physician Overview

How HELEN JOHNSON-WALL, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

HELEN JOHNSON-WALL, M.D.'s 1,311 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as JOHNSON-WALL.

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

Frequently Asked Questions

What is HELEN JOHNSON-WALL, M.D.'s specialty?
HELEN JOHNSON-WALL, M.D. specializes in Internal Medicine Physician and practices in SENECA, South Carolina. Credentials: M.D..
How much does HELEN JOHNSON-WALL, M.D. prescribe under Medicare Part D?
In 2023, HELEN JOHNSON-WALL, M.D. wrote 1,311 Medicare Part D claims totaling $240K in drug costs for 273 beneficiaries.
Where is HELEN JOHNSON-WALL, M.D. located?
HELEN JOHNSON-WALL, M.D. is located at 301 MEMORIAL DR STE F, SENECA, SC, 29672. Phone: (864) 885-7758.
What is HELEN JOHNSON-WALL, M.D.'s NPI number?
HELEN JOHNSON-WALL, M.D.'s National Provider Identifier (NPI) is 1730151481, issued on 02/06/2006.
Does HELEN JOHNSON-WALL, M.D. prescribe opioids?
Yes, HELEN JOHNSON-WALL, M.D. had 32 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does HELEN JOHNSON-WALL, M.D. prescribe most often?
Based on 2023 Medicare Part D data, HELEN JOHNSON-WALL, M.D.'s most frequently prescribed drugs include Furosemide, Amlodipine Besylate, Calcitriol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HELEN JOHNSON-WALL, M.D. accept Medicare?
HELEN JOHNSON-WALL, M.D. appears in CMS Medicare data with 1,311 Part D claims and 273 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HELEN JOHNSON-WALL, M.D.'s credentials?
HELEN JOHNSON-WALL, M.D.'s NPI is 1730151481 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