Dr. Gregg A. Valenzuela, MD
- Medicare services, 2024
- 136
- Medicare patients, 2024
- 135
- Part D claims, 2024
- 208
- Hospital affiliations
- 1
- Industry payments
- $1,292
- Practice address
- 5200 W 6th Ave, Stillwater, OK 74074
- Practice phone
- Call (405) 780-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Smc Surgery Center West
Stillwater, Oklahoma
Find Dr. Valenzuela'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. Gregg A. Valenzuela is a gastroenterologist in Stillwater, Oklahoma
Dr. Valenzuela practices at Smc Surgery Center West in Stillwater, Oklahoma.
Dr. Valenzuela's NPI, 1942250188, was assigned on May 10, 2006. Dr. Valenzuela graduated from University of Virginia School of Medicine in 1978. Dr. Valenzuela holds Virginia license 0101036504.
- NPI
- 1942250188NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032216940
- NPI enumeration date
- May 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (405) 780-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregg A. Valenzuela practices at Smc Surgery Center West in Stillwater, Oklahoma
Dr. Valenzuela's primary practice is Smc Surgery Center West, at 5200 W 6th Ave, Stillwater, OK 74074 in Payne County. The practice phone is (405) 780-7000.
- Smc Surgery Center West5200 W 6th Ave, Stillwater, OK 74074 · Payne CountyPhone(405) 780-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregg A. Valenzuela is affiliated with 3 sites of care and 2 medical groups
Dr. Valenzuela's primary practice is Smc Surgery Center West in Stillwater, Oklahoma. Dr. Valenzuela is also affiliated with Stillwater Medical Center. The medical group on file is Stillwater Medical Center. Dmand AI also links Dr. Valenzuela to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregg A. Valenzuela's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Valenzuela practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Smc Surgery Center West | 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. Gregg A. Valenzuela is one of 144 gastroenterologists in Oklahoma
Gastroenterology is Dr. Valenzuela's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Valenzuela is licensed in Virginia.
Specialties and state licenses
- Gastroenterology, VirginiaPrimary
Gastroenterologists near Dr. Valenzuela
Counts of gastroenterologists 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. Gregg A. Valenzuela billed Medicare for 136 services in 2024
CMS data shows 136 Medicare services from Dr. Valenzuela across 4 procedure codes in 2024, for 135 Medicare patients. Medicare paid $14,498 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Valenzuela's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 622024: 11585%
- Office and hospital visits
- 2023: 02024: 21
Dr. Valenzuela compared with the Oklahoma median for gastroenterologists, 2024
- Dr. Valenzuela
- Oklahoma median
- Medicare services
- 136vs 71281% below
- Medicare patients
- 135vs 41567% below
- Part D claims
- 158vs 52670% below
Medians across 142 gastroenterologists in Oklahoma with Dmand AI profiles that report each measure.
Dr. Valenzuela'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. Valenzuela and other gastroenterologists in Oklahoma.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregg A. Valenzuela treated 135 Medicare patients in 2024, average age 72
CMS counts 135 Medicare patients who saw Dr. Valenzuela in 2024. The largest group is 65 to 74, with 72 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Valenzuela's median patient age at 61, with 61% women.
Dr. Valenzuela's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Valenzuela's Medicare patients by sex, 2024
- Women7959%
- Men5641%
Chronic conditions among Dr. Valenzuela's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis48%
- Diabetes29%
- Mood disorders29%
- Depression27%
- Anxiety25%
- Ischemic heart disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Valenzuela's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregg A. Valenzuela wrote 208 Medicare Part D claims in 2024
In 2024, Dr. Valenzuela wrote 208 Medicare Part D claims for 109 patients. 90% of them were for generic drugs. CMS names the drug for 158 of them, across 6 drugs with 11 or more claims each, at $3,203 in total drug cost. In 2023, CMS named 130 claims across 4 drugs.
Dr. Valenzuela's Part D claims by kind of drug, 2024
- Generic187 claims90%
- Brand-name21 claims10%
Dr. Valenzuela'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. Valenzuela's Part D claims, 2024
- Antibiotics7%14 of 208 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: 1302024: 15822%
Drugs named by CMS: 6 in 2024, 4 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. Gregg A. Valenzuela ranks in the 87th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Valenzuela accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 170 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Valenzuela, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Valenzuela ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 87th percentile170 procedures
- Colonoscopy
- 81st percentile105 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregg A. Valenzuela received $1,292 in industry payments from 2016 to 2025
CMS Open Payments shows 77 general payments to Dr. Valenzuela from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $270.
General payments to Dr. Valenzuela by program year, 2016 to 2025
Companies that paid Dr. Valenzuela 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. Gregg A. Valenzuela graduated from University of Virginia School of Medicine
Dr. Valenzuela graduated from University of Virginia School of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregg A. Valenzuela'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 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. Gregg A. Valenzuela
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. Gregg A. Valenzuela's NPI number?
Dr. Gregg A. Valenzuela's NPI number is 1942250188. It was assigned on May 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregg A. Valenzuela?
Dr. Gregg A. Valenzuela is a gastroenterologist in Stillwater, Oklahoma. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Gregg A. Valenzuela practice?
Dr. Valenzuela practices at 5200 W 6th Ave, Stillwater, OK 74074. Dr. Valenzuela's primary practice is Smc Surgery Center West in Stillwater, Oklahoma. Dmand AI also links Dr. Valenzuela to 1 group practice or clinic and 1 medical group.
What is Dr. Gregg A. Valenzuela's office phone number?
The practice phone on file for Dr. Valenzuela is (405) 780-7000.
What is Dr. Gregg A. Valenzuela's medical license number?
Dr. Valenzuela holds Virginia license 0101036504.
Which hospitals is Dr. Gregg A. Valenzuela affiliated with?
Dr. Valenzuela is affiliated with Stillwater Medical Center.
What medical group is Dr. Gregg A. Valenzuela part of?
Dr. Valenzuela is linked to Stillwater Medical Center. Dmand AI links Dr. Valenzuela to 1 more medical group.
Does Dr. Gregg A. Valenzuela accept Medicare?
Yes. CMS data shows Dr. Valenzuela billed Medicare for 136 services in 2024, and Dr. Valenzuela accepts Medicare assignment.
How many Medicare patients does Dr. Gregg A. Valenzuela see?
CMS counts 135 Medicare patients who saw Dr. Valenzuela in 2024, with an average age of 72.
What services does Dr. Gregg A. Valenzuela bill to Medicare?
In 2024, Dr. Valenzuela's most billed Medicare services were surgery: digestive system (43239), surgery: digestive system (45380) and hospital inpatient care (99222).
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Where did Dr. Gregg A. Valenzuela go to medical school?
Dr. Valenzuela graduated from University of Virginia School of Medicine in 1978.
What drugs does Dr. Gregg A. Valenzuela prescribe most?
In 2024 Medicare Part D data, Dr. Valenzuela's most prescribed drugs by claims were Pantoprazole Sodium, Esomeprazole Magnesium and Gavilyte-G.
Has Dr. Gregg A. Valenzuela received payments from drug or device companies?
CMS Open Payments shows $1,292 in general payments to Dr. Valenzuela from 15 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Gregg A. Valenzuela been practicing?
Dr. Valenzuela graduated from medical school in 1978, 48 years ago.
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