NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1104926302 M.D.
Verify on CMS → Jonathan Koff, M.D.
Gastroenterology Physician in Chevy Chase, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 17,061 in Gastroenterology 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
741
Medicare Part D claims · 350 beneficiaries · Gastroenterology Physician avg: 848
Generic prescribing
71%
generic claims · 29% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.2K
100 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Jonathan Koff, M.D. filed 741 Medicare Part D claims in 2024 as a Gastroenterology Physician in Chevy Chase, Maryland, prescribing 71% generic.
- 741
- Part D claims, 2024
- 71%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥70th
- pct by Part D claim volume (lower-bound band)
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 Koff, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104926302), first enumerated 09/25/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 741 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- 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
$2.2K in reported industry payments (100 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1104926302 · Gastroenterology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104926302
- ENUM-LEGACY 2006
- TAX-MID 17K Gastroenterology Physician
- RX-LIGHT 741
- BOOK-THIN 424 in Maryland
- PHOTO-ENUM Henry Katz, MD · 2006
Jonathan Koff, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
741 ≥ 70th percentile 70% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Jonathan Koff, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Koff, M.D.?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
741 13% vs specialty avg
Specialty distribution in Maryland
How Gastroenterology Physician compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Gastroenterology Physician. Verify directly:
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 | 1104926302 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/25/2006 |
Hospital and facility affiliations
Facilities where Jonathan Koff, M.D. 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.
Capital Digestive Care LLC
Washington, DC
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 Koff, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.2K
Largest payer
ABBVIE 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
Jonathan Koff, M.D. - brand share 29.0%
Gastroenterology Physician average
29% brand-name claims vs 71% generic, on 741 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.
741
Total Claims
$1.0M
Total Drug Cost
350
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,510.867
- Total Day Supply
- 38,828
- Brand vs Generic
- 29% brand / 71% generic
- Brand Drug Cost
- $961K
- Generic Drug Cost
- $41K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 0.81
- Gender Split
- 49% female / 51% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Jonathan Koff, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Omeprazole
Omeprazole
112 claims
- Sod Sulf-Potass Su…
Sod Sulf-Potass Sulf-Mag Sulf
90 claims
- Pantoprazole Sodium
Pantoprazole Sodium
86 claims
- Sutab
Sutab
85 claims
- Rabeprazole Sodium 31
Rabeprazole Sodium
31 claims
- Stelara 28
Stelara
28 claims
- Esomeprazole Magne… 25
Esomeprazole Magnesium
25 claims
- Linzess 25
Linzess
25 claims
| Drug | Claims |
|---|---|
| Omeprazole | 112 |
| Sod Sulf-Potass Sulf-Mag Sulf Sodium, Potassium,mag Sulfates | 90 |
| Pantoprazole Sodium | 86 |
| Sutab Sod Sulf/Pot Chloride/Mag Sulf | 85 |
| Rabeprazole Sodium | 31 |
| Stelara Ustekinumab | 28 |
| Esomeprazole Magnesium | 25 |
| Linzess Linaclotide | 25 |
| Dicyclomine Hcl | 16 |
| Mesalamine | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Jonathan Koff, M.D. fits within the Gastroenterology Physician landscape nationally.
17,061
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
848
Avg Claims per Provider
Jonathan Koff, M.D.'s 741 claims are below the specialty average of 848.
Nationwide Gastroenterology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Koff, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Gastroenterology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Koff.
One of 424 Gastroenterology Physician providers enrolled in Maryland, 5 are shown here.
Dr. Maaza Abdi
M.D.
Baltimore, MD
Dr. Tsion Abdi
MD
Baltimore, MD
Dr. Hamza Abdulla
M.D.
Easton, MD
Dr. Thomas Abernathy
M.D.
Catonsville, MD
Dr. Ruben Acosta
M.D.
Silver Spring, MD
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jonathan Koff, M.D.'s specialty? ▼
Jonathan Koff, M.D. specializes in Gastroenterology Physician and practices in Chevy Chase, Maryland. Credentials: M.D..
How much does Jonathan Koff, M.D. prescribe under Medicare Part D? ▼
In 2024, Jonathan Koff, M.D. wrote 741 Medicare Part D claims totaling $1.0M in drug costs for 350 beneficiaries.
Where is Jonathan Koff, M.D. located? ▼
Jonathan Koff, M.D. is located at 5550 FRIENDSHIP BLVD STE T90, Chevy Chase, MD, 20815. Phone: (301) 718-0600.
What is Jonathan Koff, M.D.'s NPI number? ▼
Jonathan Koff, M.D.'s National Provider Identifier (NPI) is 1104926302, issued on 09/25/2006.
Does Jonathan Koff, M.D. prescribe more brand-name or generic drugs? ▼
Jonathan Koff, M.D.'s prescribing is 29% brand-name and 71% generic drugs by claim count, with $961K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 17,061 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 848 Medicare Part D claims per year.
What drugs does Jonathan Koff, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Jonathan Koff, M.D.'s most frequently prescribed drugs include Omeprazole, Sod Sulf-Potass Sulf-Mag Sulf, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jonathan Koff, M.D. accept Medicare? ▼
Jonathan Koff, M.D. appears in CMS Medicare data with 741 Part D claims and 350 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jonathan Koff, M.D.'s credentials? ▼
Jonathan Koff, M.D.'s NPI is 1104926302 with credentials M.D.. 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.
- 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.