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GREIFENKAMP, JONATHANMD NPI 1235333808 Clinician

Cardiology · LONGVIEW, TX

Specialty Cardiology — from billed Medicare claims
Trained UNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON — medical school, self-reported to CMS
In practice about 26 years since medical school (class of 2000, self-reported to CMS)
Location LONGVIEW, TX · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 43 codes billed · 5,366 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
REGIONAL CLINICS OF LONGVIEW
2019–2026

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 2021-11

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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

This provider's disclosed Medicare payments across all codes were in CY2024. Included with Platform.

  • Payment, 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
  • Volume over five years — discrete yearly counts, no rate
  • 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 Services Beneficiary-episodes Avg charge Avg Medicare payment
J2785 Injection, regadenoson, 0.1 mg
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
93306 Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
93015 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician
78452 Nuclear medicine studies of heart muscle at rest and with stress and spect
A9502 Technetium tc-99m tetrofosmin, diagnostic, per study dose
93970 Ultrasound study of arm or leg veins with compression and maneuvers
93297 Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
93356 Heart muscle strain imaging
93294 Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days
93971 Ultrasound study of one arm or leg veins with compression and maneuvers
93458 Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist
36482 Chemical destruction of first incompetent vein of arm or leg using imaging guidance
99152 Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
85610 Blood test, clotting time
93295 Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days
92928 Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch
93308 Ultrasound of heart, follow-up
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
93228 Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional
93793 Anticoagulant management of patient taking warfarin
A9500 Technetium tc-99m sestamibi, diagnostic, per study dose
93280 Programming of dual lead pacemaker system
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
93880 Ultrasound of both sides of head and neck blood flow
Q9969 Tc-99m from non-highly enriched uranium source, full cost recovery add-on, per study dose
93925 Ultrasound of leg arteries or artery grafts
93248 Heart rhythm review and interpretation of continous external ekg over 8-15 days
93284 Programming of multiple lead implantable defibrillator system
37225 Removal of plaque in arteries of leg
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
93244 Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days
93246 Heart rhythm recording of continous external ekg over 8-15 days
93459 Insertion of tube in left lower heart chamber, coronary artery and bypass graft for diagnosis with review by radiologist
37228 Balloon dilation of artery of leg, initial vessel
37765 Removal of varicose veins of arm or leg, 10-20 incisions
93018 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician
93242 Heart rhythm recording continous external ekg over more than 48 hours up to 7 days

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.