2026 NPPES data Nurse Practitioner NPI 1801067251 NP
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CAROLYN MARCUM, NP

Nurse Practitioner in MEMPHIS, 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
445
Medicare Part D claims · 109 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

CAROLYN MARCUM, NP filed 445 Medicare Part D claims in 2023 as a Nurse Practitioner in MEMPHIS, Tennessee, prescribing 83% generic.

445
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.

CAROLYN MARCUM, NP's Medicare Part D volume vs every U.S. prescriber

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

445 Top 38% higher than 62% 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

What does the federal data show about CAROLYN MARCUM, NP?

Quality data not reported

NPI registry status

Active

Issued 03/13/2008

NPI 1801067251

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

445 59% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

Specialty distribution in Tennessee

How Nurse Practitioner compares to other specialties among Tennessee providers

Tennessee providers

Nurse Practitioner share within Tennessee

1. Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nurse Practitioner share within Tennessee

Specialty board-certification context

Estimated specialty board-certified rate — Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nurse Practitioner) — 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).

CAROLYN MARCUM, NP appears in the CMS NPPES registry as a Nurse Practitioner provider holding NP credentials at 5865 RIDEWAY CENTER PARKWAY, MEMPHIS, TN, 38120, with a listed phone of (337) 991-9276. NPI 1801067251 was issued on 03/13/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MARCUM 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 445 prescription claims written by this provider, covering 109 Medicare beneficiaries and totaling roughly $30K in drug spend, split 17% brand-name and 83% generic by claim count, with an opioid prescribing rate of 3.4%. 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.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 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

5865 RIDEWAY CENTER PARKWAY
MEMPHIS, TN 38120

Provider Details

NPI 1801067251
Specialty Nurse Practitioner
Credentials NP
Gender Female
NPI Issued 03/13/2008

Brand vs generic prescribing mix · Typical

CAROLYN MARCUM, NP — brand share 17.0%
Specialty average (est.)

17% brand-name claims vs 83% generic, on 445 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.

445
Total Claims
$30K
Total Drug Cost
109
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
452
Total Day Supply
12,050
Brand vs Generic
17% brand / 83% generic
Brand Drug Cost
$26K
Generic Drug Cost
$4K
Opioid Claims
15 (3.4% rate)
Antibiotic Claims
11

Patient Demographics

Average Patient Age
80.6 years
Avg HCC Risk Score
2.35
Gender Split
65% female / 35% male

Top Prescribed Drugs (Medicare Part D)

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

What CAROLYN MARCUM, NP 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
Atorvastatin Calcium
29
Amlodipine Besylate
17
Losartan Potassium
17
Pantoprazole Sodium
17
Gabapentin
15
Eliquis
Apixaban
14
Furosemide
14
Levothyroxine Sodium
14
Potassium Chloride
14
Clopidogrel
Clopidogrel Bisulfate
11

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

Nurse Practitioner Overview

How CAROLYN MARCUM, NP fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

CAROLYN MARCUM, NP's 445 claims are below the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Tennessee

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

Compare Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is CAROLYN MARCUM, NP's specialty?
CAROLYN MARCUM, NP specializes in Nurse Practitioner and practices in MEMPHIS, Tennessee. Credentials: NP.
How much does CAROLYN MARCUM, NP prescribe under Medicare Part D?
In 2023, CAROLYN MARCUM, NP wrote 445 Medicare Part D claims totaling $30K in drug costs for 109 beneficiaries.
Where is CAROLYN MARCUM, NP located?
CAROLYN MARCUM, NP is located at 5865 RIDEWAY CENTER PARKWAY, MEMPHIS, TN, 38120. Phone: (337) 991-9276.
What is CAROLYN MARCUM, NP's NPI number?
CAROLYN MARCUM, NP's National Provider Identifier (NPI) is 1801067251, issued on 03/13/2008.
Does CAROLYN MARCUM, NP prescribe more brand-name or generic drugs?
CAROLYN MARCUM, NP's prescribing is 17% brand-name and 83% generic drugs by claim count, with $26K in brand drug costs.
Does CAROLYN MARCUM, NP prescribe opioids?
Yes, CAROLYN MARCUM, NP had 15 opioid claims in 2023 with an opioid prescribing rate of 3.4%.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does CAROLYN MARCUM, NP prescribe most often?
Based on 2023 Medicare Part D data, CAROLYN MARCUM, NP's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CAROLYN MARCUM, NP accept Medicare?
CAROLYN MARCUM, NP appears in CMS Medicare data with 445 Part D claims and 109 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROLYN MARCUM, NP's credentials?
CAROLYN MARCUM, NP's NPI is 1801067251 with credentials NP. 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