NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1972821593 DO
Verify on CMS → Jon Grammes, DO
Cardiovascular Disease Physician in Norfolk, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 24,810 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
2K
Medicare Part D claims · 453 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
64%
generic claims · 36% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
95.1/100
▲ 12 pts above national avg 83.1 · Exceptional
Industry payments
$848.51
28 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Jon Grammes, DO reported a CMS MIPS final score of 95.1/100 - above the 83.1 national average - and filed 2,089 Medicare Part D claims in 2023.
- 95.1/100
- MIPS score · +12 vs avg
- 2K
- Part D claims, 2023
- 64%
- 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.
Jon Grammes, DO's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 21% higher than 79% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Jon Grammes, DO sits
This provider among cardiovascular disease physician peers
Across the 8,753 cardiovascular disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Jon Grammes, DO writes more Part D claims than 39% of them and scores higher on MIPS quality than 78% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one cardiovascular disease physician peer from a representative sample of 60; the gold marker is Jon Grammes, DO. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Jon Grammes, DO 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 Jon Grammes, DO?
High performer (top quartile)Primary specialty
Cardiovascular Disease Physician
Medicare Part D claims
2,089 31% vs specialty avg
MIPS final score
95.1/100 12 pts vs avg
Specialty distribution in Virginia
How Cardiovascular Disease Physician compares to other specialties among Virginia providers
Medicare quality performance, MIPS
Jon Grammes, DO's 2023 MIPS final score plotted against the Cardiovascular Disease Physician national average
- MIPS Final Score
- 95.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Cardiovascular Disease Physician) - 95.1/100 vs national avg 83.1
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).
Jon Grammes, DO appears in the CMS NPPES registry as a Cardiovascular Disease Physician provider holding DO credentials at 844 KEMPSVILLE RD STE 204, Norfolk, VA, 23502, with a listed phone of (757) 261-0700. NPI 1972821593 was issued on 05/06/2010.
Medicare Part D records for calendar year 2023 show 2,089 prescription claims written by this provider, covering 453 Medicare beneficiaries and totaling roughly $962K in drug spend, split 36% brand-name and 64% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 95.1/100 for the 2023 performance year (Quality 86.3), compared with the national average of 83.1.
Cardiovascular Disease Physician is a mid-sized specialty nationwide, with 24,810 enrolled providers across 54 states and an average of 3,033 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
Provider Details
| NPI | 1972821593 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 05/06/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
95.1126
Final Score
Avg: 83.1
86.3184
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Jon Grammes, DO 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.
Sentara Medical Group
Norfolk, VA
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 Jon Grammes, DO. Source: openpaymentsdata.cms.gov.
Total received
$849
Largest payer
Vital Connect, 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.
Brand vs generic prescribing mix · Above average
Jon Grammes, DO - brand share 36.0%
Cardiovascular Disease Physician average
36% brand-name claims vs 64% generic, on 2,089 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.
2,089
Total Claims
$962K
Total Drug Cost
453
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,028
- Total Day Supply
- 149,894
- Brand vs Generic
- 36% brand / 64% generic
- Brand Drug Cost
- $899K
- Generic Drug Cost
- $63K
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 1.71
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 28, 65-74: 192, 75-84: 179, 85+: 54
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jon Grammes, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Eliquis
Eliquis
564 claims
- Flecainide Acetate 206
Flecainide Acetate
206 claims
- Metoprolol Succinate 145
Metoprolol Succinate
145 claims
- Metoprolol Tartrate 127
Metoprolol Tartrate
127 claims
- Amiodarone Hcl 114
Amiodarone Hcl
114 claims
- Xarelto 113
Xarelto
113 claims
- Carvedilol 93
Carvedilol
93 claims
- Diltiazem 24hr Er … 77
Diltiazem 24hr Er (Cd)
77 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 564 |
| Flecainide Acetate | 206 |
| Metoprolol Succinate | 145 |
| Metoprolol Tartrate | 127 |
| Amiodarone Hcl | 114 |
| Xarelto Rivaroxaban | 113 |
| Carvedilol | 93 |
| Diltiazem 24hr Er (Cd) Diltiazem Hcl | 77 |
| Amlodipine Besylate | 67 |
| Losartan Potassium | 63 |
* 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 Jon Grammes, DO fits within the Cardiovascular Disease Physician landscape nationally.
24,810
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,033
Avg Claims per Provider
Jon Grammes, DO's 2,089 claims are below the specialty average of 3,033.
Nearby Cardiovascular Disease Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Grammes.
Dr. Gerard Abate
M.D.
Williamsburg, VA
Dr. Antonio Abbate
M.D.
Charlottesville, VA
Dr. Raushan Abdula
M.D.
Fredericksburg, VA
Dr. Tarek Abou-Ghazala
M.D.
Reston, VA
Dr. Hussein Aboulatta
MD
Suffolk, VA
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Cardiovascular Disease Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Jon Grammes, DO's specialty? ▼
Jon Grammes, DO specializes in Cardiovascular Disease Physician and practices in Norfolk, Virginia. Credentials: DO.
How much does Jon Grammes, DO prescribe under Medicare Part D? ▼
In 2023, Jon Grammes, DO wrote 2,089 Medicare Part D claims totaling $962K in drug costs for 453 beneficiaries.
What is Jon Grammes, DO's Medicare quality score? ▼
Jon Grammes, DO has a CMS MIPS Final Score of 95.1/100 (Quality: 86.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Jon Grammes, DO located? ▼
Jon Grammes, DO is located at 844 KEMPSVILLE RD STE 204, Norfolk, VA, 23502. Phone: (757) 261-0700.
What is Jon Grammes, DO's NPI number? ▼
Jon Grammes, DO's National Provider Identifier (NPI) is 1972821593, issued on 05/06/2010.
Does Jon Grammes, DO prescribe more brand-name or generic drugs? ▼
Jon Grammes, DO's prescribing is 36% brand-name and 64% generic drugs by claim count, with $899K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 24,810 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,033 Medicare Part D claims per year.
What drugs does Jon Grammes, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Jon Grammes, DO's most frequently prescribed drugs include Eliquis, Flecainide Acetate, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jon Grammes, DO accept Medicare? ▼
Jon Grammes, DO appears in CMS Medicare data with 2,089 Part D claims and 453 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jon Grammes, DO's credentials? ▼
Jon Grammes, DO's NPI is 1972821593 with credentials DO. 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 (2023). 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 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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.