2026 NPPES data Anatomic Pathology & Clinical Pathology Physician NPI 1831166628 MD
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ROBERT JOHNSON, MD

Anatomic Pathology & Clinical Pathology Physician in BENNETTSVILLE, 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
107
Medicare Part D claims · Anatomic Pathology & Clinical Pathology Physician avg: 284
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

ROBERT JOHNSON, MD filed 107 Medicare Part D claims in 2023 as a Anatomic Pathology & Clinical Pathology Physician in BENNETTSVILLE, South Carolina, prescribing 86% generic.

107
Part D claims, 2023
86%
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.

ROBERT JOHNSON, MD's Medicare Part D volume vs every U.S. prescriber

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

107 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 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)

ROBERT JOHNSON, 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 ROBERT JOHNSON, MD?

Quality data not reported

NPI registry status

Active

Issued 03/01/2006

NPI 1831166628

Primary specialty

Anatomic Pathology & Clinical Pathology Physician

Mid-sized

13,692 US NPIs in this specialty

Medicare Part D claims

107 62% vs specialty avg

2023 prescription claims

Specialty avg: 284

Specialty distribution in South Carolina

How Anatomic Pathology & Clinical Pathology Physician compares to other specialties among South Carolina providers

South Carolina providers

Anatomic Pathology & Clinical Pathology Physician share within South Carolina

1. Anatomic Pathology & Clinical Pathology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Anatomic Pathology & Clinical Pathology Physician share within South Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Anatomic Pathology & Clinical Pathology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Anatomic Pathology & Clinical Pathology Physician ABMS/AOA estimate

Est. board-certified rate (Anatomic Pathology & Clinical Pathology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Anatomic Pathology & Clinical Pathology 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).

ROBERT JOHNSON, MD appears in the CMS NPPES registry as a Anatomic Pathology & Clinical Pathology Physician provider holding MD credentials at 672 HIGHWAY 9 W, BENNETTSVILLE, SC, 29512, with a listed phone of (843) 479-2402. NPI 1831166628 was issued on 03/01/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOHNSON 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 107 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $16K in drug spend, split 14% brand-name and 86% 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.

Anatomic Pathology & Clinical Pathology Physician is a mid-sized specialty nationwide, with 13,692 enrolled providers across 55 states and an average of 284 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

672 HIGHWAY 9 W
BENNETTSVILLE, SC 29512

Provider Details

NPI 1831166628
Specialty Anatomic Pathology & Clinical Pathology Physician
Credentials MD
Gender Male
NPI Issued 03/01/2006

Brand vs generic prescribing mix · Typical

ROBERT JOHNSON, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 107 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.

107
Total Claims
$16K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
107
Total Day Supply
3,070
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$14K
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
72.0 years
Avg HCC Risk Score
1.04

Top Prescribed Drugs (Medicare Part D)

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

What ROBERT JOHNSON, 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
Levothyroxine Sodium
22
Amlodipine Besylate
12
Bupropion Hcl
12
Rosuvastatin Calcium
12
Losartan Potassium
11
Myrbetriq
Mirabegron
11
Tamsulosin Hcl
11

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

Anatomic Pathology & Clinical Pathology Physician Overview

How ROBERT JOHNSON, MD fits within the Anatomic Pathology & Clinical Pathology Physician landscape nationally.

13,692
Anatomic Pathology & Clinical Pathology Physician Providers in US
55
States with Anatomic Pathology & Clinical Pathology Physician
284
Avg Claims per Provider

ROBERT JOHNSON, MD's 107 claims are below the specialty average of 284.

Nearby Anatomic Pathology & Clinical Pathology 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.

Compare Anatomic Pathology & Clinical Pathology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT JOHNSON, MD's specialty?
ROBERT JOHNSON, MD specializes in Anatomic Pathology & Clinical Pathology Physician and practices in BENNETTSVILLE, South Carolina. Credentials: MD.
How much does ROBERT JOHNSON, MD prescribe under Medicare Part D?
In 2023, ROBERT JOHNSON, MD wrote 107 Medicare Part D claims totaling $16K in drug costs for N/A beneficiaries.
Where is ROBERT JOHNSON, MD located?
ROBERT JOHNSON, MD is located at 672 HIGHWAY 9 W, BENNETTSVILLE, SC, 29512. Phone: (843) 479-2402.
What is ROBERT JOHNSON, MD's NPI number?
ROBERT JOHNSON, MD's National Provider Identifier (NPI) is 1831166628, issued on 03/01/2006.
Does ROBERT JOHNSON, MD prescribe more brand-name or generic drugs?
ROBERT JOHNSON, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $14K in brand drug costs.
How many Anatomic Pathology & Clinical Pathology Physician providers are there in the US?
There are 13,692 Anatomic Pathology & Clinical Pathology Physician providers across 55 states in the US. The average Anatomic Pathology & Clinical Pathology Physician provider writes 284 Medicare Part D claims per year.
What drugs does ROBERT JOHNSON, MD prescribe most often?
Based on 2023 Medicare Part D data, ROBERT JOHNSON, MD's most frequently prescribed drugs include Levothyroxine Sodium, Amlodipine Besylate, Bupropion Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT JOHNSON, MD accept Medicare?
ROBERT JOHNSON, MD appears in CMS Medicare data with 107 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 ROBERT JOHNSON, MD's credentials?
ROBERT JOHNSON, MD's NPI is 1831166628 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