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HERZOG, JOHNMD NPI 1093734949 Clinician

Cardiology · GREENVILLE, MS

Specialty Cardiology — from billed Medicare claims
Trained UNIVERSITY OF MISSISSIPPI SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 45 years since medical school (class of 1981, self-reported to CMS)
Location GREENVILLE, MS · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 43 codes billed · 12,514 disclosed volume (CY2024 — most recent year in data)
Current groups
member of 2 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20212026
DELTA MEDICAL GROUP
2026
DELTA HEART AND VASCULAR CENTER, P.A.
2021–2026
DELTA MEDICAL GROUP
2021–2023

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2020-08
Data year CY2024 CY2023 CY2022  CY2021  CY2020 

Provider overview · all codes · CY2024

The full analytics for this provider

Premium

The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed submitted charges across all codes were in CY2024. Included with Platform.

  • Charge, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Volume Beneficiary-episodes Avg charge Avg Medicare payment
J0461 Injection, atropine sulfate, 0.01 mg
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
93306 Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes
J1250 Injection, dobutamine hydrochloride, per 250 mg
36415 Insertion of needle into vein for collection of blood sample
99238 Hospital discharge day management, 30 minutes or less
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
J1805 Injection, esmolol hydrochloride, 10 mg
99439 Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
93925 Ultrasound of leg arteries or artery grafts
93320 Ultrasound of heart blood flow, valves and chambers
93325 Ultrasound of heart with color-depicted blood flow, rate and valve function
93351 Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report
93458 Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist
93922 Ultrasound study of arm and leg arteries
93978 Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
99153 Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes
93228 Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional

Showing the top 25 of 43 procedures this clinician billed. The full list is part of the premium platform. Notify me at launch →

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.