Dr. Gregory Horner, MD
- Medicare services, 2023
- 12
- Part D claims, 2019
- 22
- Industry payments
- $347
- Affiliated sites
- 3
- Medical group
- 1
- Practice address
- 4626 Willow Road, Suite 100, Pleasanton, CA 94588
- Practice phone
- Call (925) 227-1315
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hacienda Surgery Center
Surgery Center - Medicare-Certified · Pleasanton, California
Find Dr. Horner'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. Gregory Horner is an orthopaedic hand surgery physician in Pleasanton, California
Dr. Horner practices at Hacienda Surgery Center in Pleasanton, California.
Dr. Horner's NPI, 1295730331, was assigned on June 16, 2005. Dr. Horner graduated from The Johns Hopkins University School of Medicine in 1993. Dr. Horner holds California license A54276.
- NPI
- 1295730331NPI Registry (opens in a new tab)
- NPI enumeration date
- June 16, 2005
- NPI status
- Active
- Practice phone
- (925) 227-1315
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory Horner practices at Hacienda Surgery Center in Pleasanton, California
Dr. Horner's primary practice is Hacienda Surgery Center, at 4626 Willow Road, Suite 100, Pleasanton, CA 94588. The practice phone is (925) 227-1315.
- Hacienda Surgery Center4626 Willow Road, Suite 100, Pleasanton, CA 94588Phone(925) 227-1315
Source: Dmand AI Affiliation Data
Dr. Gregory Horner is affiliated with 3 sites of care and 1 medical group
Dr. Horner's primary practice is Hacienda Surgery Center in Pleasanton, California. Dmand AI also links Dr. Horner to 1 physician office, 1 group practice or clinic and 1 medical group, 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 Horner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horner practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hacienda Surgery Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Horner is one of 268 orthopaedic hand surgery physicians in California
Hand surgery is Dr. Horner's primary specialty in the NPI Registry, under taxonomy code 207XS0106X. Dr. Horner is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Horner's licenses on file in 4 states: California, Washington, Florida and Missouri.
Specialties and state licenses
- Orthopaedic hand surgery, CaliforniaPrimary
- Washington license
- Florida license
- Missouri license
Clinical focus
Dmand AI lists arm, wrist, hand fracture and dislocation, carpal tunnel syndrome, hand joint or tendon inflammation, joint cyst and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Horner treats.
Orthopaedic hand surgery physicians near Dr. Horner
Counts of orthopaedic hand surgery physicians 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 Horner billed Medicare for 12 services in 2023
CMS data shows 12 Medicare services from Dr. Horner across 1 procedure code in 2023, all of them office visits. Medicare paid $420 for them. Every service was in an office.
Dr. Horner's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1052023: 1289%
- Drugs given in the office
- 2022: 1812023: 0100%
- Imaging
- 2022: 482023: 0100%
- Other services
- 2022: 222023: 0100%
- Surgery
- 2022: 552023: 0100%
Dr. Horner compared with the California median for orthopaedic hand surgery physicians, 2023
- Dr. Horner
- California median
- Medicare services
- 12vs 95899% below
- Part D claims
- 22vs 5157% below
Medians across 252 orthopaedic hand surgery physicians in California with Dmand AI profiles that report each measure.
Dr. Horner's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Horner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horner and other orthopaedic hand surgery physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Horner's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Horner's median patient age at 63, with 67% women.
Dr. Horner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. Gregory Horner wrote 22 Medicare Part D claims in 2019
In 2019, Dr. Horner wrote 22 Medicare Part D claims. They cover 1 drug, with $160 in total drug cost. In 2018, CMS named 23 claims across 1 drug.
Dr. Horner's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 232019: 224%
Drugs named by CMS: 1 in 2019, 1 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gregory Horner received $347 in industry payments from 2016 to 2020
CMS Open Payments shows 6 general payments to Dr. Horner from 5 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $114.
General payments to Dr. Horner by program year, 2016 to 2020
Companies that paid Dr. Horner the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Horner graduated from The Johns Hopkins University School of Medicine
Dr. Horner graduated from The Johns Hopkins University School of Medicine in 1993.
- Medical school
- Board certified in orthopaedic surgery
- Board certified in surgery of the hand
Source: Dmand AI Professional Profile Data
Dr. Gregory Horner accepts plans from 10 insurance carriers
Dr. Horner is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Alliant Health Plans
- +2 more carriersWith a free account
Plan types Dr. Horner accepts, by number of carriers
- PPO8
- Medicare7
- HMO5
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory Horner'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 Horner
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 Horner's NPI number?
Dr. Gregory Horner's NPI number is 1295730331. It was assigned on June 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Horner?
Dr. Gregory Horner is an orthopaedic hand surgery physician in Pleasanton, California. The primary specialty in the NPI Registry is Orthopaedic Hand Surgery Physician (taxonomy code 207XS0106X).
Where does Dr. Gregory Horner practice?
Dr. Horner practices at 4626 Willow Road, Suite 100, Pleasanton, CA 94588. Dr. Horner's primary practice is Hacienda Surgery Center in Pleasanton, California. Dmand AI also links Dr. Horner to 1 physician office, 1 group practice or clinic and 1 medical group.
What is Dr. Gregory Horner's office phone number?
The practice phone on file for Dr. Horner is (925) 227-1315.
What is Dr. Gregory Horner's medical license number?
Dr. Horner holds California license A54276, one of the licenses on file in 4 states.
Which states has Dr. Gregory Horner been licensed in?
Dmand AI has state licenses on file for Dr. Horner in California (1995 to 2027), Washington (2024 to 2027), Florida (2023 to 2026) and Missouri (2023 to 2026).
Does Dr. Gregory Horner accept Medicare?
Yes. CMS data shows Dr. Horner billed Medicare for 12 services in 2023.
Is Dr. Gregory Horner board certified?
Yes. Dr. Horner is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
What services does Dr. Gregory Horner bill to Medicare?
In 2023, Dr. Horner's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Gregory Horner go to medical school?
Dr. Horner graduated from The Johns Hopkins University School of Medicine in 1993.
Show 4 more questionsShow fewer questions
What drugs does Dr. Gregory Horner prescribe most?
In 2019 Medicare Part D data, Dr. Horner's most prescribed drugs by claims were Acetaminophen-Codeine.
Has Dr. Gregory Horner received payments from drug or device companies?
CMS Open Payments shows $347 in general payments to Dr. Horner from 5 companies from 2016 to 2020. The largest total came from Stryker Corporation.
How long has Dr. Gregory Horner been practicing?
Dr. Horner graduated from medical school in 1993, 33 years ago.
What insurance does Dr. Gregory Horner accept?
Dr. Horner is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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