Dr. Gregory A. Robertson, MD
- Medicare services, 2024
- 259
- Medicare patients, 2024
- 162
- Part D claims, 2024
- 95
- Hospital affiliations
- 2
- Industry payments
- $78,540
- Practice address
- 3555 South Val Vista Drive, Gilbert, AZ 85297
- Practice phone
- Call (480) 728-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Robertson'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 A. Robertson is a general surgeon in Gilbert, Arizona
Dr. Robertson practices at Dignity Health Mercy Gilbert Medical Center in Gilbert, Arizona, part of CommonSpirit Health.
Dr. Robertson's NPI, 1609917418, was assigned on February 12, 2007. Dr. Robertson graduated from Harvard Medical School in 1985. Dr. Robertson holds Arizona license 17506.
- NPI
- 1609917418NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749200368
- NPI enumeration date
- February 12, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 728-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory A. Robertson practices at Dignity Health Mercy Gilbert Medical Center in Gilbert, Arizona
Dr. Robertson's primary practice is Dignity Health Mercy Gilbert Medical Center, at 3555 South Val Vista Drive, Gilbert, AZ 85297 in Maricopa County. The practice phone is (480) 728-8000.
- Dignity Health Mercy Gilbert Medical Center3555 South Val Vista Drive, Gilbert, AZ 85297 · Maricopa CountyPhone(480) 728-8000
Source: Dmand AI Affiliation Data
Dr. Gregory A. Robertson is affiliated with 5 sites of care and 2 medical groups
Dr. Robertson's primary practice is Dignity Health Mercy Gilbert Medical Center in Gilbert, Arizona, part of CommonSpirit Health. Dr. Robertson is also affiliated with Dignity Health Chandler Regional Medical Center. The medical group on file is St. Joseph's Faculty Physicians. Dmand AI also links Dr. Robertson to 2 more group practices and clinics, 1 physician office 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 A. Robertson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Robertson practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health Mercy Gilbert Medical Center | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory A. Robertson is one of 617 general surgeons in Arizona
Surgery is Dr. Robertson's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Robertson is licensed in Arizona.
Specialties and state licenses
- Surgery, ArizonaPrimary
General surgeons near Dr. Robertson
Counts of general 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. Gregory A. Robertson billed Medicare for 259 services in 2024
CMS data shows 259 Medicare services from Dr. Robertson across 5 procedure codes in 2024, for 162 Medicare patients. Medicare paid $38,726 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Robertson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2542024: 22213%
- Surgery
- 2023: 192024: 3795%
Dr. Robertson compared with the Arizona median for general surgeons, 2024
- Dr. Robertson
- Arizona median
- Medicare services
- 259vs 16260% above
- Medicare patients
- 162vs 11640% above
- Part D claims
- 47vs 3152% above
Medians across 545 general surgeons in Arizona with Dmand AI profiles that report each measure.
Dr. Robertson'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. Robertson and other general surgeons in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Robertson treated 162 Medicare patients in 2024, average age 74
CMS counts 162 Medicare patients who saw Dr. Robertson in 2024. The largest group is 65 to 74, with 68 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.90, 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. Robertson's median patient age at 54, with 56% women.
Dr. Robertson's Medicare patients by age, 2024
Dr. Robertson's Medicare patients by sex, 2024
- Women8452%
- Men7848%
Chronic conditions among Dr. Robertson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Chronic kidney disease49%
- Diabetes41%
- Ischemic heart disease38%
- Atrial fibrillation35%
- Anxiety32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Robertson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory A. Robertson wrote 95 Medicare Part D claims in 2024
In 2024, Dr. Robertson wrote 95 Medicare Part D claims for 68 patients. 96% of them were for generic drugs. CMS names the drug for 47 of them, across 1 drug with 11 or more claims each, at $345 in total drug cost. In 2023, CMS named 33 claims across 2 drugs.
Dr. Robertson's Part D claims by kind of drug, 2024
- Generic91 claims96%
- Brand-name and other4 claims4%
Dr. Robertson'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. Robertson's Part D claims, 2024
- Opioids59%56 of 95 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: 332024: 4742%
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. Gregory A. Robertson takes part in Medicare
Dr. Robertson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory A. Robertson received $78,540 in industry payments from 2016 to 2025
CMS Open Payments shows 136 general payments to Dr. Robertson from 15 drug and device companies from 2016 to 2025. Education make up the largest share, 70% of the total. Intuitive Surgical, Inc. paid the most, $68,573.
General payments to Dr. Robertson by program year, 2016 to 2025
General payments to Dr. Robertson by kind, 2016 to 2025
- Education$54,63770%
- Travel and lodging$8,11110%
- Speaker and faculty fees$8,00010%
- Food and beverage$7,68110%
- Consulting fees$1100%
Companies that paid Dr. Robertson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory A. Robertson graduated from Harvard Medical School
Dr. Robertson graduated from Harvard Medical School in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory A. Robertson'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)Doctors and Clinicians Utilization Data (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 A. Robertson
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 A. Robertson's NPI number?
Dr. Gregory A. Robertson's NPI number is 1609917418. It was assigned on February 12, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory A. Robertson?
Dr. Gregory A. Robertson is a general surgeon in Gilbert, Arizona. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gregory A. Robertson practice?
Dr. Robertson practices at 3555 South Val Vista Drive, Gilbert, AZ 85297. Dr. Robertson's primary practice is Dignity Health Mercy Gilbert Medical Center in Gilbert, Arizona, part of CommonSpirit Health. Dmand AI also links Dr. Robertson to 2 group practices and clinics, 1 physician office and 1 medical group.
What is Dr. Gregory A. Robertson's office phone number?
The practice phone on file for Dr. Robertson is (480) 728-8000.
What is Dr. Gregory A. Robertson's medical license number?
Dr. Robertson holds Arizona license 17506.
Which hospitals is Dr. Gregory A. Robertson affiliated with?
Dr. Robertson practices at Dignity Health Mercy Gilbert Medical Center in Gilbert, Arizona. Dr. Robertson is also affiliated with Dignity Health Chandler Regional Medical Center.
What medical group is Dr. Gregory A. Robertson part of?
Dr. Robertson is linked to St. Joseph's Faculty Physicians. Dmand AI links Dr. Robertson to 1 more medical group.
Does Dr. Gregory A. Robertson accept Medicare?
Yes. CMS data shows Dr. Robertson billed Medicare for 259 services in 2024, and Dr. Robertson accepts Medicare assignment.
How many Medicare patients does Dr. Gregory A. Robertson see?
CMS counts 162 Medicare patients who saw Dr. Robertson in 2024, with an average age of 74.
What services does Dr. Gregory A. Robertson bill to Medicare?
In 2024, Dr. Robertson's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and hospital inpatient care (99223).
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Where did Dr. Gregory A. Robertson go to medical school?
Dr. Robertson graduated from Harvard Medical School in 1985.
What drugs does Dr. Gregory A. Robertson prescribe most?
In 2024 Medicare Part D data, Dr. Robertson's most prescribed drugs by claims were Oxycodone-Acetaminophen.
Has Dr. Gregory A. Robertson received payments from drug or device companies?
CMS Open Payments shows $78,540 in general payments to Dr. Robertson from 15 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gregory A. Robertson been practicing?
Dr. Robertson graduated from medical school in 1985, 41 years ago.
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