NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1235333808 MD
Verify on CMS → Jonathan Greifenkamp, MD
Cardiovascular Disease Physician in Longview, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 25,298 in Cardiovascular Disease Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
5K
Medicare Part D claims · 809 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
90.8/100
▲ 7 pts above national avg 83.5 · Exceptional
Industry payments
$2.6K
156 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Jonathan Greifenkamp, MD reported a CMS MIPS final score of 90.8/100 - above the 83.5 national average - and filed 4,953 Medicare Part D claims in 2024.
- 90.8/100
- MIPS score · +7 vs avg
- 5K
- Part D claims, 2024
- 81%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Federal trust snapshot
What official records show about Jonathan Greifenkamp, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1235333808), first enumerated 06/14/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,953 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 90.8/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$2.6K in reported industry payments (156 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Jonathan Greifenkamp, MD's individual license status. Verify directly with the state medical board.
Source: TMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1235333808 · Cardiovascular Disease Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ABOVE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1235333808
- ENUM-MID 2007
- TAX-MID 25K Cardiovascular Disease
- MIPS-ABOVE 90.8/100
- RX-MID 4,953
- BOOK-LIGHT 1,578 in Texas
- PHOTO-FINISH Rohit Amin, MD · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Greifenkamp · th…
Greifenkamp · this provider
90.8 MIPS pts
- Mitchell Bowman,…
Mitchell Bowman, MD
90.8 MIPS pts
- Luis Guzman, M.D…
Luis Guzman, M.D.
90.8 MIPS pts
- Rohit Amin, MD ·…
Rohit Amin, MD
90.8 MIPS pts
- Adam Bainey, D.O…
Adam Bainey, D.O.
90.8 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Jonathan Greifenkamp, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
91 ≥ 58th percentile 58% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Jonathan Greifenkamp, MD sits
This provider among cardiovascular disease physician peers
Across the 7,999 cardiovascular disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jonathan Greifenkamp, MD writes more Part D claims than 74% of them and scores higher on MIPS quality than 60% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one cardiovascular disease physician peer from a representative sample of 60; the gold marker is Jonathan Greifenkamp, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jonathan Greifenkamp, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Jonathan Greifenkamp, MD?
High performer (top quartile)Primary specialty
Cardiovascular Disease Physician
Medicare Part D claims
4,953 57% vs specialty avg
MIPS final score
90.8/100 7.3 pts vs avg
Specialty distribution in Texas
How Cardiovascular Disease Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
Jonathan Greifenkamp, MD's 2023 MIPS final score plotted against the Cardiovascular Disease Physician national average
- MIPS Final Score
- 90.8/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1235333808 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/14/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
90.8483
Final Score
Measured-score avg: 83.5
81.6966
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Jonathan Greifenkamp, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Regional Clinics OF Longview
Longview, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Jonathan Greifenkamp, MD. Source: openpaymentsdata.cms.gov.
Total received
$2.6K
Largest payer
Biosense Webster, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Jonathan Greifenkamp, MD. To verify Jonathan Greifenkamp, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Jonathan Greifenkamp, MD - brand share 19.0%
Cardiovascular Disease Physician average
19% brand-name claims vs 81% generic, on 4,953 2024 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 2024.
4,953
Total Claims
$833K
Total Drug Cost
809
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 11,105.833
- Total Day Supply
- 331,005
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $778K
- Generic Drug Cost
- $55K
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 43% female / 57% male
- Age Distribution
- <65: 29, 65-74: 352, 75-84: 340, 85+: 88
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Jonathan Greifenkamp, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Clopidogrel
Clopidogrel
692 claims
- Atorvastatin Calcium
Atorvastatin Calcium
373 claims
- Eliquis
Eliquis
342 claims
- Carvedilol
Carvedilol
291 claims
- Ezetimibe 237
Ezetimibe
237 claims
- Furosemide 237
Furosemide
237 claims
- Rosuvastatin Calcium 216
Rosuvastatin Calcium
216 claims
- Metoprolol Tartrate 197
Metoprolol Tartrate
197 claims
| Drug | Claims |
|---|---|
| Clopidogrel Clopidogrel Bisulfate | 692 |
| Atorvastatin Calcium | 373 |
| Eliquis Apixaban | 342 |
| Carvedilol | 291 |
| Ezetimibe | 237 |
| Furosemide | 237 |
| Rosuvastatin Calcium | 216 |
| Metoprolol Tartrate | 197 |
| Metoprolol Succinate | 183 |
| Potassium Chloride | 179 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Cardiovascular Disease Physician Overview
How Jonathan Greifenkamp, MD fits within the Cardiovascular Disease Physician landscape nationally.
25,298
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,149
Avg Claims per Provider
Jonathan Greifenkamp, MD's 4,953 claims are above the specialty average of 3,149.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Greifenkamp, both outside Texas so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (90.8 here).
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Cardiovascular Disease Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Greifenkamp.
One of 1,578 Cardiovascular Disease Physician providers enrolled in Texas, 5 are shown here.
Dr. Aamir Abbas
M.D.
Houston, TX
Dr. Ismaile Abdalla
M.D.
Amarillo, TX
Dr. Yasir Abdul Ghaffar
M.D.
San Antonio, TX
Dr. Amer Abdulla
MD
Galveston, TX
Dr. Arif Abdullah
M.D.
Conroe, TX
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jonathan Greifenkamp, MD's specialty? ▼
Jonathan Greifenkamp, MD specializes in Cardiovascular Disease Physician and practices in Longview, Texas. Credentials: MD.
How much does Jonathan Greifenkamp, MD prescribe under Medicare Part D? ▼
In 2024, Jonathan Greifenkamp, MD wrote 4,953 Medicare Part D claims totaling $833K in drug costs for 809 beneficiaries.
What is Jonathan Greifenkamp, MD's Medicare quality score? ▼
Jonathan Greifenkamp, MD has a CMS MIPS Final Score of 90.8/100 (Quality: 81.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jonathan Greifenkamp, MD located? ▼
Jonathan Greifenkamp, MD is located at 709 HOLLYBROOK DR, Longview, TX, 75605. Phone: (903) 757-4691.
What is Jonathan Greifenkamp, MD's NPI number? ▼
Jonathan Greifenkamp, MD's National Provider Identifier (NPI) is 1235333808, issued on 06/14/2007.
Does Jonathan Greifenkamp, MD prescribe more brand-name or generic drugs? ▼
Jonathan Greifenkamp, MD's prescribing is 19% brand-name and 81% generic drugs by claim count, with $778K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 25,298 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,149 Medicare Part D claims per year.
What drugs does Jonathan Greifenkamp, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Jonathan Greifenkamp, MD's most frequently prescribed drugs include Clopidogrel, Atorvastatin Calcium, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jonathan Greifenkamp, MD accept Medicare? ▼
Jonathan Greifenkamp, MD appears in CMS Medicare data with 4,953 Part D claims and 809 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jonathan Greifenkamp, MD's credentials? ▼
Jonathan Greifenkamp, MD's NPI is 1235333808 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
View source datasets and methodology notes
- 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.