2026 NPPES data Internal Medicine Physician NPI 1821293093 MD
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CONSTANCE LYNNE MARONEY, MD

Internal Medicine Physician in FLORENCE, 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
14K
Medicare Part D claims · 610 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CONSTANCE LYNNE MARONEY, MD filed 13,728 Medicare Part D claims in 2023 as a Internal Medicine Physician in FLORENCE, South Carolina, prescribing 83% generic.

14K
Part D claims, 2023
83%
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.

CONSTANCE LYNNE MARONEY, MD's Medicare Part D volume vs every U.S. prescriber

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

13,728 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)

CONSTANCE LYNNE MARONEY, MD 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 CONSTANCE LYNNE MARONEY, MD?

Quality data not reported

NPI registry status

Active

Issued 06/18/2007

NPI 1821293093

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

13,728 405% 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).

CONSTANCE LYNNE MARONEY, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 101 SOUTH RAVENEL STREET, FLORENCE, SC, 29506, with a listed phone of (843) 777-7341. NPI 1821293093 was issued on 06/18/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MARONEY 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 13,728 prescription claims written by this provider, covering 610 Medicare beneficiaries and totaling roughly $2.0 million in drug spend, split 17% brand-name and 83% generic by claim count, with an opioid prescribing rate of 2.7%. 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

101 SOUTH RAVENEL STREET
FLORENCE, SC 29506

Provider Details

NPI 1821293093
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 06/18/2007

Brand vs generic prescribing mix · Typical

CONSTANCE LYNNE MARONEY, MD — brand share 17.0%
Specialty average (est.)

17% brand-name claims vs 83% generic, on 13,728 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.

13,728
Total Claims
$2.0M
Total Drug Cost
610
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
29,549
Total Day Supply
855,308
Brand vs Generic
17% brand / 83% generic
Brand Drug Cost
$1.8M
Generic Drug Cost
$245K
Opioid Claims
367 (2.7% rate)
Antibiotic Claims
516

Patient Demographics

Average Patient Age
77.1 years
Avg HCC Risk Score
1.23
Gender Split
80% female / 20% male
Age Distribution
<65: 12, 65-74: 214, 75-84: 279, 85+: 105

Top Prescribed Drugs (Medicare Part D)

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

What CONSTANCE LYNNE MARONEY, MD 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
Rosuvastatin Calcium
665
Amlodipine Besylate
637
Levothyroxine Sodium
469
Atorvastatin Calcium
391
Lisinopril
316
Pantoprazole Sodium
301
Metformin Hcl Er
Metformin Hcl
284
Alprazolam
278
Metoprolol Succinate
278
Carvedilol
261

* 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 CONSTANCE LYNNE MARONEY, MD 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

CONSTANCE LYNNE MARONEY, MD's 13,728 claims are above 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 MARONEY.

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

Frequently Asked Questions

What is CONSTANCE LYNNE MARONEY, MD's specialty?
CONSTANCE LYNNE MARONEY, MD specializes in Internal Medicine Physician and practices in FLORENCE, South Carolina. Credentials: MD.
How much does CONSTANCE LYNNE MARONEY, MD prescribe under Medicare Part D?
In 2023, CONSTANCE LYNNE MARONEY, MD wrote 13,728 Medicare Part D claims totaling $2.0M in drug costs for 610 beneficiaries.
Where is CONSTANCE LYNNE MARONEY, MD located?
CONSTANCE LYNNE MARONEY, MD is located at 101 SOUTH RAVENEL STREET, FLORENCE, SC, 29506. Phone: (843) 777-7341.
What is CONSTANCE LYNNE MARONEY, MD's NPI number?
CONSTANCE LYNNE MARONEY, MD's National Provider Identifier (NPI) is 1821293093, issued on 06/18/2007.
Does CONSTANCE LYNNE MARONEY, MD prescribe more brand-name or generic drugs?
CONSTANCE LYNNE MARONEY, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $1.8M in brand drug costs.
Does CONSTANCE LYNNE MARONEY, MD prescribe opioids?
Yes, CONSTANCE LYNNE MARONEY, MD had 367 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
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 CONSTANCE LYNNE MARONEY, MD prescribe most often?
Based on 2023 Medicare Part D data, CONSTANCE LYNNE MARONEY, MD's most frequently prescribed drugs include Rosuvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CONSTANCE LYNNE MARONEY, MD accept Medicare?
CONSTANCE LYNNE MARONEY, MD appears in CMS Medicare data with 13,728 Part D claims and 610 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CONSTANCE LYNNE MARONEY, MD's credentials?
CONSTANCE LYNNE MARONEY, MD's NPI is 1821293093 with credentials MD. 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