Dr. Gregory Keith Riffle, DO
- Medicare services, 2024
- 575
- Medicare patients, 2024
- 205
- Part D claims, 2024
- 628
- MIPS score, 2024
- 77
- Hospital affiliations
- 3
- Practice address
- 401 North Ewing Street, Lancaster, OH 43130
- Practice phone
- Call (740) 687-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Riffle's professional email, personal email and mobile number
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Dr. Gregory Keith Riffle is an internist in Lancaster, Ohio
Dr. Riffle practices at Fairfield Medical Center in Lancaster, Ohio, part of Adena Occupational Health.
Dr. Riffle's NPI, 1427398429, was assigned on February 27, 2013. Dr. Riffle graduated from Ohio University, College of Osteopathic Medicine in 2013. Dr. Riffle holds Ohio license 34011676.
- NPI
- 1427398429NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385962323
- NPI enumeration date
- February 27, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (740) 687-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Keith Riffle practices at Fairfield Medical Center in Lancaster, Ohio
Dr. Riffle's primary practice is Fairfield Medical Center, at 401 North Ewing Street, Lancaster, OH 43130 in Fairfield County. The practice phone is (740) 687-8000.
- Fairfield Medical Center401 North Ewing Street, Lancaster, OH 43130 · Fairfield CountyPhone(740) 687-8000
Source: Dmand AI Affiliation Data
Dr. Gregory Keith Riffle is affiliated with 7 sites of care and 3 medical groups
Dr. Riffle's primary practice is Fairfield Medical Center in Lancaster, Ohio, part of Adena Occupational Health. Dr. Riffle is also affiliated with Hocking Valley Community Hospital. The medical group on file is Fairfield Healthcare Professionals. Dmand AI also links Dr. Riffle to 1 more hospital, 3 group practices and clinics, 2 medical groups and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Keith Riffle's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riffle practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fairfield Medical Center | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Keith Riffle is one of 4,708 internists in Ohio
Internal medicine is Dr. Riffle's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Riffle is licensed in Ohio.
Specialties and state licenses
- Internal medicine, OhioPrimary
Internists near Dr. Riffle
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Keith Riffle billed Medicare for 575 services in 2024
CMS data shows 575 Medicare services from Dr. Riffle across 5 procedure codes in 2024, for 205 Medicare patients. Medicare paid $47,151 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Riffle's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5532024: 5754%
Dr. Riffle compared with the Ohio median for internists, 2024
- Dr. Riffle
- Ohio median
- Medicare services
- 575vs 48718% above
- Medicare patients
- 205vs 1927% above
- Part D claims
- 419vs 29443% above
Medians across 4,703 internists in Ohio with Dmand AI profiles that report each measure.
Dr. Riffle's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Riffle and other internists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Keith Riffle treated 205 Medicare patients in 2024, average age 76
CMS counts 205 Medicare patients who saw Dr. Riffle in 2024. The largest group is 75 to 84, with 80 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.44, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Riffle's median patient age at 71, with 50% women.
Dr. Riffle's Medicare patients by age, 2024
Dr. Riffle's Medicare patients by sex, 2024
- Women10451%
- Men10149%
Chronic conditions among Dr. Riffle's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease60%
- Arthritis55%
- Diabetes51%
- Chronic kidney disease50%
- Heart failure46%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Riffle's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Keith Riffle wrote 628 Medicare Part D claims in 2024
In 2024, Dr. Riffle wrote 628 Medicare Part D claims for 232 patients. 89% of them were for generic drugs. CMS names the drug for 419 of them, across 19 drugs with 11 or more claims each, at $12,222 in total drug cost. In 2023, CMS named 244 claims across 14 drugs.
Dr. Riffle's Part D claims by kind of drug, 2024
- Generic560 claims89%
- Brand-name and other68 claims11%
Dr. Riffle's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Riffle's Part D claims, 2024
- Opioids5%30 of 628 claims
- Antibiotics18%115 of 628 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2442024: 41972%
Drugs named by CMS: 19 in 2024, 14 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory Keith Riffle scored 77 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 77 out of 100 for Dr. Riffle for performance year 2024, reported as part of a group. Dr. Riffle accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Riffle's MIPS scores, performance year 2024
- 77of 100Final score
- 43.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory Keith Riffle received $46 in industry payments from 2016 to 2024
CMS Open Payments shows 3 general payments to Dr. Riffle from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Inari Medical, Inc. paid the most, $19.
General payments to Dr. Riffle by program year, 2016 to 2024
Companies that paid Dr. Riffle the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Keith Riffle graduated from Ohio University, College of Osteopathic Medicine
Dr. Riffle graduated from Ohio University, College of Osteopathic Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Keith Riffle's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory Keith Riffle
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory Keith Riffle's NPI number?
Dr. Gregory Keith Riffle's NPI number is 1427398429. It was assigned on February 27, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Keith Riffle?
Dr. Gregory Keith Riffle is an internist in Lancaster, Ohio. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregory Keith Riffle practice?
Dr. Riffle practices at 401 North Ewing Street, Lancaster, OH 43130. Dr. Riffle's primary practice is Fairfield Medical Center in Lancaster, Ohio, part of Adena Occupational Health. Dmand AI also links Dr. Riffle to 1 hospital, 3 group practices and clinics, 2 medical groups and 1 hospice.
What is Dr. Gregory Keith Riffle's office phone number?
The practice phone on file for Dr. Riffle is (740) 687-8000.
What is Dr. Gregory Keith Riffle's medical license number?
Dr. Riffle holds Ohio license 34011676.
Which hospitals is Dr. Gregory Keith Riffle affiliated with?
Dr. Riffle practices at Fairfield Medical Center in Lancaster, Ohio. Dr. Riffle is also affiliated with Hocking Valley Community Hospital. Dmand AI links Dr. Riffle to 1 more hospital.
What medical group is Dr. Gregory Keith Riffle part of?
Dr. Riffle is linked to Fairfield Healthcare Professionals. Dmand AI links Dr. Riffle to 2 more medical groups.
Does Dr. Gregory Keith Riffle accept Medicare?
Yes. CMS data shows Dr. Riffle billed Medicare for 575 services in 2024, and Dr. Riffle accepts Medicare assignment.
What is Dr. Gregory Keith Riffle's MIPS score?
Dr. Riffle's MIPS final score for performance year 2024 is 77 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory Keith Riffle see?
CMS counts 205 Medicare patients who saw Dr. Riffle in 2024, with an average age of 76.
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What services does Dr. Gregory Keith Riffle bill to Medicare?
In 2024, Dr. Riffle's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Where did Dr. Gregory Keith Riffle go to medical school?
Dr. Riffle graduated from Ohio University, College of Osteopathic Medicine in 2013.
What drugs does Dr. Gregory Keith Riffle prescribe most?
In 2024 Medicare Part D data, Dr. Riffle's most prescribed drugs by claims were Furosemide, Metoprolol Succinate and Amoxicillin-Clavulanate Potass.
Has Dr. Gregory Keith Riffle received payments from drug or device companies?
CMS Open Payments shows $46 in general payments to Dr. Riffle from 3 companies from 2016 to 2024. The largest total came from Inari Medical, Inc.
How long has Dr. Gregory Keith Riffle been practicing?
Dr. Riffle graduated from medical school in 2013, 13 years ago.
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