2026 NPPES data General Practice Physician NPI 1033475074 M.D.
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KATHERINE ANDEREGG, M.D.

General Practice Physician in SULLIVAN'S ISLAND, 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
20
Medicare Part D claims · General Practice Physician avg: 3K
What the federal data reveals: KATHERINE ANDEREGG, M.D. is a General Practice Physician ([object Object]) practicing in SULLIVAN'S ISLAND, South Carolina with a Medicare Part D prescribing footprint of 20 claims .

What stands out: KATHERINE ANDEREGG, M.D. filed 20 Medicare Part D claims in 2023 across SULLIVAN'S ISLAND, South Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

KATHERINE ANDEREGG, 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).

KATHERINE ANDEREGG, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/04/2012

NPI 1033475074

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

20 99% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in South Carolina

How General Practice Physician compares to other specialties among South Carolina providers

South Carolina providers

General Practice Physician share within South Carolina

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

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

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

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

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

KATHERINE ANDEREGG, M.D. is a General Practice Physician provider practicing in SULLIVAN'S ISLAND, South Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1033475074. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

KATHERINE ANDEREGG, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 1730 THOMPSON AVENUE, SULLIVAN'S ISLAND, SC, 29482, with a listed phone of (843) 883-3336. NPI 1033475074 was issued on 04/04/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ANDEREGG 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 20 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $355 in drug spend. 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

1730 THOMPSON AVENUE
SULLIVAN'S ISLAND, SC 29482

Provider Details

NPI 1033475074
Specialty General Practice Physician
Credentials M.D.
Gender Female
NPI Issued 04/04/2012

Medicare Part D Prescribing Data

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

20
Total Claims
$355
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
33
Total Day Supply
882
Generic Drug Cost
$341

Patient Demographics

Average Patient Age
66.0 years
Avg HCC Risk Score
1.64

General Practice Physician Overview

How KATHERINE ANDEREGG, M.D. fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

KATHERINE ANDEREGG, M.D.'s 20 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in South Carolina

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KATHERINE ANDEREGG, M.D.'s specialty?
KATHERINE ANDEREGG, M.D. specializes in General Practice Physician and practices in SULLIVAN'S ISLAND, South Carolina. Credentials: M.D..
How much does KATHERINE ANDEREGG, M.D. prescribe under Medicare Part D?
In 2023, KATHERINE ANDEREGG, M.D. wrote 20 Medicare Part D claims totaling $355 in drug costs for N/A beneficiaries.
Where is KATHERINE ANDEREGG, M.D. located?
KATHERINE ANDEREGG, M.D. is located at 1730 THOMPSON AVENUE, SULLIVAN'S ISLAND, SC, 29482. Phone: (843) 883-3336.
What is KATHERINE ANDEREGG, M.D.'s NPI number?
KATHERINE ANDEREGG, M.D.'s National Provider Identifier (NPI) is 1033475074, issued on 04/04/2012.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
Does KATHERINE ANDEREGG, M.D. accept Medicare?
KATHERINE ANDEREGG, M.D. appears in CMS Medicare data with 20 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KATHERINE ANDEREGG, M.D.'s credentials?
KATHERINE ANDEREGG, M.D.'s NPI is 1033475074 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