Dr. Darin Ray Gregory, MD
- Medicare services, 2024
- 13
- Medicare patients, 2024
- 43
- Part D claims, 2024
- 148
- Hospital affiliations
- 1
- Industry payments
- $172
- Practice address
- 725 American Ave, Waukesha, WI 53188
- Practice phone
- Call (262) 928-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gregory's professional email, personal email and mobile number
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Dr. Darin Ray Gregory is an OB-GYN in Waukesha, Wisconsin
Dr. Gregory practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care.
Dr. Gregory's NPI, 1023189198, was assigned on November 12, 2006. Dr. Gregory holds Wisconsin license 49075-020.
- NPI
- 1023189198NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456428226
- NPI enumeration date
- November 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (262) 928-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Darin Ray Gregory practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin
Dr. Gregory's primary practice is ProHealth Waukesha Memorial Hospital, at 725 American Ave, Waukesha, WI 53188 in Waukesha County. The practice phone is (262) 928-1000.
- ProHealth Waukesha Memorial Hospital725 American Ave, Waukesha, WI 53188 · Waukesha CountyPhone(262) 928-1000
Source: Dmand AI Affiliation Data
Dr. Darin Ray Gregory is affiliated with 2 sites of care and 1 medical group
Dr. Gregory's primary practice is ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care. The medical group on file is Moreland OB-GYN Associates. Dmand AI also links Dr. Gregory to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Darin Ray Gregory's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gregory practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ProHealth Waukesha Memorial Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Darin Ray Gregory is one of 651 OB-GYNs in Wisconsin
Obstetrics and gynecology is Dr. Gregory's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Gregory is licensed in Wisconsin.
Specialties and state licenses
- Obstetrics and gynecology, WisconsinPrimary
OB-GYNs near Dr. Gregory
Counts of OB-GYNs 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. Darin Ray Gregory billed Medicare for 13 services in 2024
CMS data shows 13 Medicare services from Dr. Gregory across 1 procedure code in 2024, for 43 Medicare patients. Medicare paid $467 for them. Every service was in an office.
Dr. Gregory's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 152024: 1313%
- Office and hospital visits
- 2023: 252024: 0100%
Dr. Gregory compared with the Wisconsin median for OB-GYNs, 2024
- Dr. Gregory
- Wisconsin median
- Medicare services
- 13vs 2548% below
- Medicare patients
- 43vs 3139% above
- Part D claims
- 44vs 2857% above
Medians across 609 OB-GYNs in Wisconsin with Dmand AI profiles that report each measure.
Dr. Gregory'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. Gregory and other OB-GYNs in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Darin Ray Gregory treated 43 Medicare patients in 2024, average age 67
CMS counts 43 Medicare patients who saw Dr. Gregory in 2024. The largest group is 65 to 74, with 23 patients. 56% of them have high blood pressure, and 49% have arthritis. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gregory's median patient age at 40, with 99% women.
Dr. Gregory's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Gregory's Medicare patients, 2024
- High blood pressure56%
- Arthritis49%
- High cholesterol49%
- Anxiety28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gregory's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women99%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Darin Ray Gregory wrote 148 Medicare Part D claims in 2024
In 2024, Dr. Gregory wrote 148 Medicare Part D claims for 45 patients. 89% of them were for generic drugs. CMS names the drug for 44 of them, across 2 drugs with 11 or more claims each, at $2,476 in total drug cost. In 2023, CMS named 55 claims across 2 drugs.
Dr. Gregory's Part D claims by kind of drug, 2024
- Generic132 claims89%
- Brand-name16 claims11%
Dr. Gregory'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: 552024: 4420%
Drugs named by CMS: 2 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. Darin Ray Gregory takes part in Medicare
Dr. Gregory accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 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. Darin Ray Gregory received $172 in industry payments from 2016 to 2019
CMS Open Payments shows 4 general payments to Dr. Gregory from 3 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $98.
General payments to Dr. Gregory by program year, 2016 to 2019
Companies that paid Dr. Gregory the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Darin Ray Gregory'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) |
| 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. Darin Ray Gregory
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. Darin Ray Gregory's NPI number?
Dr. Darin Ray Gregory's NPI number is 1023189198. It was assigned on November 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Darin Ray Gregory?
Dr. Darin Ray Gregory is an OB-GYN in Waukesha, Wisconsin. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Darin Ray Gregory practice?
Dr. Gregory practices at 725 American Ave, Waukesha, WI 53188. Dr. Gregory's primary practice is ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin, part of ProHealth Care. Dmand AI also links Dr. Gregory to 1 group practice or clinic.
What is Dr. Darin Ray Gregory's office phone number?
The practice phone on file for Dr. Gregory is (262) 928-1000.
What is Dr. Darin Ray Gregory's medical license number?
Dr. Gregory holds Wisconsin license 49075-020.
Which hospitals is Dr. Darin Ray Gregory affiliated with?
Dr. Gregory practices at ProHealth Waukesha Memorial Hospital in Waukesha, Wisconsin.
What medical group is Dr. Darin Ray Gregory part of?
Dr. Gregory is linked to Moreland OB-GYN Associates.
Does Dr. Darin Ray Gregory accept Medicare?
Yes. CMS data shows Dr. Gregory billed Medicare for 13 services in 2024, and Dr. Gregory accepts Medicare assignment.
How many Medicare patients does Dr. Darin Ray Gregory see?
CMS counts 43 Medicare patients who saw Dr. Gregory in 2024, with an average age of 67.
What services does Dr. Darin Ray Gregory bill to Medicare?
In 2024, Dr. Gregory's most billed Medicare services were medicare service (G0101).
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What drugs does Dr. Darin Ray Gregory prescribe most?
In 2024 Medicare Part D data, Dr. Gregory's most prescribed drugs by claims were Estradiol and Norethindrone.
Has Dr. Darin Ray Gregory received payments from drug or device companies?
CMS Open Payments shows $172 in general payments to Dr. Gregory from 3 companies from 2016 to 2019. The largest total came from Abbvie Inc.
How long has Dr. Darin Ray Gregory been practicing?
Dr. Gregory graduated from medical school in 2008, 18 years ago.
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