Dr. Jason McMaster, MD
- Medicare services, 2018
- 39
- Medicare patients, 2024
- 19
- Part D claims, 2024
- 35
- Hospital affiliations
- 4
- Industry payments
- $1,452
- Practice address
- 125 Hospital Drive, Watertown, WI 53098
- Practice phone
- Call (920) 261-4210
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McMaster'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. Jason McMaster is an OB-GYN in Watertown, Wisconsin
Dr. McMaster practices at Watertown Regional Medical Center in Watertown, Wisconsin, part of Lifepoint Health.
Dr. McMaster's NPI, 1184990178, was assigned on March 24, 2012. Dr. McMaster holds Florida license ME140220.
- NPI
- 1184990178NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678892775
- NPI enumeration date
- March 24, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 261-4210
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jason McMaster practices at Watertown Regional Medical Center in Watertown, Wisconsin
Dr. McMaster's primary practice is Watertown Regional Medical Center, at 125 Hospital Drive, Watertown, WI 53098 in Dodge County. The practice phone is (920) 261-4210.
- Watertown Regional Medical Center125 Hospital Drive, Watertown, WI 53098 · Dodge CountyPhone(920) 261-4210
Source: Dmand AI Affiliation Data
Dr. Jason McMaster is affiliated with 5 sites of care and 16 medical groups
Dr. McMaster's primary practice is Watertown Regional Medical Center in Watertown, Wisconsin, part of Lifepoint Health. Dr. McMaster is also affiliated with AdventHealth Orlando. The medical group on file is SSM Health Dean Medical Group. Dmand AI also links Dr. McMaster to 2 more hospitals, 15 medical groups and 1 group practice or clinic, 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. Jason McMaster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMaster practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Watertown Regional Medical Center | Available with a free account |
| +4 more sites and 15 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Lifepoint Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jason McMaster is one of 651 OB-GYNs in Wisconsin
Obstetrics and gynecology is Dr. McMaster's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dmand AI has Dr. McMaster's licenses on file in 3 states: Florida, Tennessee and Wisconsin.
Specialties and state licenses
- Obstetrics and gynecology, FloridaPrimary
- Gynecology, Tennessee
- Wisconsin license
OB-GYNs near Dr. McMaster
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. Jason McMaster billed Medicare for 39 services in 2018
CMS data shows 39 Medicare services from Dr. McMaster across 1 procedure code in 2018, all of them office visits, for 19 Medicare patients. Medicare paid $1,483 for them. Every service was in an office.
Dr. McMaster's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 202018: 3995%
Dr. McMaster compared with the Wisconsin median for OB-GYNs, 2018
- Dr. McMaster
- Wisconsin median
- Medicare services
- 39vs 2556% above
- Medicare patients
- 19vs 3139% below
- Part D claims
- 12vs 2857% below
Medians across 609 OB-GYNs in Wisconsin with Dmand AI profiles that report each measure.
Dr. McMaster's most billed Medicare procedure codes, 2018
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. McMaster?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. McMaster and other OB-GYNs in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jason McMaster treated 19 Medicare patients in 2024, average age 59
CMS counts 19 Medicare patients who saw Dr. McMaster in 2024. Their average risk score is 1.25, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. McMaster's median patient age at 34, with 99% women.
Dr. McMaster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 34
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. Jason McMaster wrote 35 Medicare Part D claims in 2024
In 2024, Dr. McMaster wrote 35 Medicare Part D claims for 16 patients. 100% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $2,335 in total drug cost. In 2018, CMS named 25 claims across 1 drug.
Dr. McMaster's most prescribed drugs by claims, 2020
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 2020
- 2018
- 2020
- Claims for drugs CMS names
- 2018: 252020: 1252%
Drugs named by CMS: 1 in 2020, 1 in 2018.
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. Jason McMaster takes part in Medicare
Dr. McMaster 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jason McMaster received $1,452 in industry payments from 2017 to 2025
CMS Open Payments shows 57 general payments to Dr. McMaster from 19 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 99% of the total. Hologic Inc paid the most, $376.
General payments to Dr. McMaster by program year, 2017 to 2025
General payments to Dr. McMaster by kind, 2017 to 2025
- Food and beverage$1,43599%
- Education$171%
Companies that paid Dr. McMaster the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jason McMaster'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. Jason McMaster
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. Jason McMaster's NPI number?
Dr. Jason McMaster's NPI number is 1184990178. It was assigned on March 24, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Jason McMaster?
Dr. Jason McMaster is an OB-GYN in Watertown, Wisconsin. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Jason McMaster practice?
Dr. McMaster practices at 125 Hospital Drive, Watertown, WI 53098. Dr. McMaster's primary practice is Watertown Regional Medical Center in Watertown, Wisconsin, part of Lifepoint Health. Dmand AI also links Dr. McMaster to 2 hospitals, 15 medical groups and 1 group practice or clinic.
What is Dr. Jason McMaster's office phone number?
The practice phone on file for Dr. McMaster is (920) 261-4210.
What is Dr. Jason McMaster's medical license number?
Dr. McMaster holds Florida license ME140220, one of the licenses on file in 3 states.
Which states has Dr. Jason McMaster been licensed in?
Dmand AI has state licenses on file for Dr. McMaster in Florida, Tennessee and Wisconsin.
Which hospitals is Dr. Jason McMaster affiliated with?
Dr. McMaster practices at Watertown Regional Medical Center in Watertown, Wisconsin. Dr. McMaster is also affiliated with AdventHealth Orlando. Dmand AI links Dr. McMaster to 2 more hospitals.
What medical group is Dr. Jason McMaster part of?
Dr. McMaster is linked to SSM Health Dean Medical Group. Dmand AI links Dr. McMaster to 15 more medical groups.
Does Dr. Jason McMaster accept Medicare?
Yes. CMS data shows Dr. McMaster billed Medicare for 39 services in 2018, and Dr. McMaster accepts Medicare assignment.
How many Medicare patients does Dr. Jason McMaster see?
CMS counts 19 Medicare patients who saw Dr. McMaster in 2024, with an average age of 59.
Show 4 more questionsShow fewer questions
What services does Dr. Jason McMaster bill to Medicare?
In 2018, Dr. McMaster's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Jason McMaster prescribe most?
In 2020 Medicare Part D data, Dr. McMaster's most prescribed drugs by claims were Imvexxy.
Has Dr. Jason McMaster received payments from drug or device companies?
CMS Open Payments shows $1,452 in general payments to Dr. McMaster from 19 companies from 2017 to 2025. The largest total came from Hologic Inc.
How long has Dr. Jason McMaster been practicing?
Dr. McMaster graduated from medical school in 2011, 15 years ago.
Selling to obstetrics and gynecology practices?
See OB-GYNs in Wisconsin by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card