Dr. Greg S. Keller, MD
- Medicare services, 2024
- 168
- Medicare patients, 2024
- 92
- Part D claims, 2024
- 18
- Hospital affiliations
- 1
- Industry payments
- $778
- Practice address
- 1003 Willow Creek Rd, Prescott, AZ 86301
- Practice phone
- Call (315) 917-9966
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Luke's Campus
Prescott, Arizona
Find Dr. Keller's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Greg S. Keller is an orthopedic surgeon in Prescott, Arizona
Dr. Keller practices at St. Luke's Campus in Prescott, Arizona.
Dr. Keller's NPI, 1639284813, was assigned on August 20, 2006. Dr. Keller graduated from Pennsylvania State University College of Medicine in 1994. Dr. Keller holds Arizona license 31711.
- NPI
- 1639284813NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820063225
- NPI enumeration date
- August 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (315) 917-9966
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Greg S. Keller practices at St. Luke's Campus in Prescott, Arizona
Dr. Keller's primary practice is St. Luke's Campus, at 1003 Willow Creek Rd, Prescott, AZ 86301 in Yavapai County. The practice phone is (315) 917-9966.
- St. Luke's Campus1003 Willow Creek Rd, Prescott, AZ 86301 · Yavapai CountyPhone(315) 917-9966
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Greg S. Keller is affiliated with 2 sites of care and 3 medical groups
Dr. Keller's primary practice is St. Luke's Campus in Prescott, Arizona. Dr. Keller is also affiliated with Lewis County General Hospital. The medical group on file is District Medical Group. Dmand AI also links Dr. Keller to 2 more medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Greg S. Keller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keller practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Luke's Campus | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Greg S. Keller is one of 377 orthopedic surgeons in Arizona
Orthopaedic surgery is Dr. Keller's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Keller is licensed in Arizona.
Specialties and state licenses
- Orthopaedic surgery, ArizonaPrimary
Orthopedic surgeons near Dr. Keller
Counts of orthopedic surgeons 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. Greg S. Keller billed Medicare for 168 services in 2024
CMS data shows 168 Medicare services from Dr. Keller across 5 procedure codes in 2024, for 92 Medicare patients. Medicare paid $8,847 for them. Every service was in an office.
Dr. Keller's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1972024: 14327%
- Surgery
- 2023: 242024: 254%
- Imaging
- 2023: 382024: 0100%
Dr. Keller compared with the Arizona median for orthopedic surgeons, 2024
- Dr. Keller
- Arizona median
- Medicare services
- 168vs 98883% below
- Medicare patients
- 92vs 28768% below
- Part D claims
- 11vs 7485% below
Medians across 343 orthopedic surgeons in Arizona with Dmand AI profiles that report each measure.
Dr. Keller'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Greg S. Keller treated 92 Medicare patients in 2024, average age 77
CMS counts 92 Medicare patients who saw Dr. Keller in 2024. The largest group is 65 to 74, with 35 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 35% are also on Medicaid. Their average risk score is 1.55, 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. Keller's median patient age at 72, with 43% women.
Dr. Keller's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Keller's Medicare patients by sex, 2024
- Women6166%
- Men3134%
Chronic conditions among Dr. Keller's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis74%
- Diabetes42%
- Anxiety40%
- Chronic kidney disease35%
- Mood disorders35%
- Ischemic heart disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Keller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Greg S. Keller wrote 18 Medicare Part D claims in 2024
In 2024, Dr. Keller wrote 18 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $81 in total drug cost. In 2023, CMS named 34 claims across 2 drugs.
Dr. Keller'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 342024: 1168%
Drugs named by CMS: 1 in 2024, 2 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
How Dr. Greg S. Keller takes part in Medicare
Dr. Keller accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Greg S. Keller received $778 in industry payments from 2020 to 2025
CMS Open Payments shows 8 general payments to Dr. Keller from 5 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 57% of the total. Zimmer Biomet Holdings, Inc. paid the most, $364.
General payments to Dr. Keller by program year, 2020 to 2025
General payments to Dr. Keller by kind, 2020 to 2025
- Food and beverage$44557%
- Education$33343%
Companies that paid Dr. Keller the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Greg S. Keller graduated from Pennsylvania State University College of Medicine
Dr. Keller graduated from Pennsylvania State University College of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Greg S. Keller'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Greg S. Keller
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. Greg S. Keller's NPI number?
Dr. Greg S. Keller's NPI number is 1639284813. It was assigned on August 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Greg S. Keller?
Dr. Greg S. Keller is an orthopedic surgeon in Prescott, Arizona. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Greg S. Keller practice?
Dr. Keller practices at 1003 Willow Creek Rd, Prescott, AZ 86301. Dr. Keller's primary practice is St. Luke's Campus in Prescott, Arizona. Dmand AI also links Dr. Keller to 2 medical groups.
What is Dr. Greg S. Keller's office phone number?
The practice phone on file for Dr. Keller is (315) 917-9966.
What is Dr. Greg S. Keller's medical license number?
Dr. Keller holds Arizona license 31711.
Which hospitals is Dr. Greg S. Keller affiliated with?
Dr. Keller is affiliated with Lewis County General Hospital.
What medical group is Dr. Greg S. Keller part of?
Dr. Keller is linked to District Medical Group. Dmand AI links Dr. Keller to 2 more medical groups.
Does Dr. Greg S. Keller accept Medicare?
Yes. CMS data shows Dr. Keller billed Medicare for 168 services in 2024, and Dr. Keller accepts Medicare assignment.
How many Medicare patients does Dr. Greg S. Keller see?
CMS counts 92 Medicare patients who saw Dr. Keller in 2024, with an average age of 77.
What services does Dr. Greg S. Keller bill to Medicare?
In 2024, Dr. Keller's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99203) and surgery: bones and joints (20610).
Show 4 more questionsShow fewer questions
Where did Dr. Greg S. Keller go to medical school?
Dr. Keller graduated from Pennsylvania State University College of Medicine in 1994.
What drugs does Dr. Greg S. Keller prescribe most?
In 2024 Medicare Part D data, Dr. Keller's most prescribed drugs by claims were Gabapentin.
Has Dr. Greg S. Keller received payments from drug or device companies?
CMS Open Payments shows $778 in general payments to Dr. Keller from 5 companies from 2020 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Greg S. Keller been practicing?
Dr. Keller graduated from medical school in 1994, 32 years ago.
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