Dr. David Mark Hayes, MD
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 154
- Industry payments
- $258
- Affiliated sites
- 2
- State license
- 1
- Practice address
- 2833 Fort Missoula Rd, Missoula, MT 59804
- Practice phone
- Call (406) 542-6559
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Big Sky Surgery Center
Surgery Center - Medicare-Certified · Missoula, Montana
Find Dr. Hayes' 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. David Mark Hayes is an otolaryngologist in Missoula, Montana
Dr. Hayes practices at Big Sky Surgery Center in Missoula, Montana.
Dr. Hayes' NPI, 1205823416, was assigned on October 3, 2005. Dr. Hayes graduated from University of Colorado School of Medicine, Denver in 1981. Dr. Hayes holds Montana license 5281.
- NPI
- 1205823416NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648174011
- NPI enumeration date
- October 3, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 542-6559
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Mark Hayes practices at Big Sky Surgery Center in Missoula, Montana
Dr. Hayes' primary practice is Big Sky Surgery Center, at 2833 Fort Missoula Rd, Missoula, MT 59804. The practice phone is (406) 542-6559.
- Big Sky Surgery Center2833 Fort Missoula Rd, Missoula, MT 59804Phone(406) 542-6559
Source: Dmand AI Affiliation Data
Dr. David Mark Hayes is affiliated with 2 sites of care
Dr. Hayes' primary practice is Big Sky Surgery Center in Missoula, Montana. Dmand AI also links Dr. Hayes to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Mark Hayes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hayes practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Big Sky Surgery Center | Available with a free account |
| +1 more affiliated site | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. David Mark Hayes is one of 38 otolaryngologists in Montana
Otolaryngology is Dr. Hayes' primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Hayes is licensed in Montana.
Specialties and state licenses
- Otolaryngology, MontanaPrimary
Otolaryngologists near Dr. Hayes
Counts of otolaryngologists 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. David Mark Hayes treated 15 Medicare patients in 2024, average age 73
CMS counts 15 Medicare patients who saw Dr. Hayes in 2024. The largest group is under 65, with 0 patients. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hayes' median patient age at 45, with 47% women.
Dr. Hayes' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hayes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Mark Hayes wrote 154 Medicare Part D claims in 2024
In 2024, Dr. Hayes wrote 154 Medicare Part D claims for 32 patients. 91% of them were for generic drugs. CMS names the drug for 123 of them, across 7 drugs with 11 or more claims each, at $573 in total drug cost. In 2023, CMS named 98 claims across 5 drugs.
Dr. Hayes' Part D claims by kind of drug, 2024
- Generic140 claims91%
- Brand-name14 claims9%
Dr. Hayes' 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. Hayes' Part D claims, 2024
- Opioids22%34 of 154 claims
- Antibiotics18%27 of 154 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: 982024: 12326%
Drugs named by CMS: 7 in 2024, 5 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. David Mark Hayes takes part in Medicare
Dr. Hayes accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Skin biopsy: 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. David Mark Hayes received $258 in industry payments from 2016 to 2025
CMS Open Payments shows 12 general payments to Dr. Hayes from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Merz North America, Inc. paid the most, $137.
General payments to Dr. Hayes by program year, 2016 to 2025
Companies that paid Dr. Hayes 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. David Mark Hayes graduated from University of Colorado School of Medicine, Denver
Dr. Hayes graduated from University of Colorado School of Medicine, Denver in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Mark Hayes'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 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. David Mark Hayes
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. David Mark Hayes' NPI number?
Dr. David Mark Hayes' NPI number is 1205823416. It was assigned on October 3, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. David Mark Hayes?
Dr. David Mark Hayes is an otolaryngologist in Missoula, Montana. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. David Mark Hayes practice?
Dr. Hayes practices at 2833 Fort Missoula Rd, Missoula, MT 59804. Dr. Hayes' primary practice is Big Sky Surgery Center in Missoula, Montana. Dmand AI also links Dr. Hayes to 1 physician office.
What is Dr. David Mark Hayes' office phone number?
The practice phone on file for Dr. Hayes is (406) 542-6559.
What is Dr. David Mark Hayes' medical license number?
Dr. Hayes holds Montana license 5281.
Does Dr. David Mark Hayes accept Medicare?
Yes. CMS lists Dr. Hayes as accepting Medicare assignment.
How many Medicare patients does Dr. David Mark Hayes see?
CMS counts 15 Medicare patients who saw Dr. Hayes in 2024, with an average age of 73.
Where did Dr. David Mark Hayes go to medical school?
Dr. Hayes graduated from University of Colorado School of Medicine, Denver in 1981.
What drugs does Dr. David Mark Hayes prescribe most?
In 2024 Medicare Part D data, Dr. Hayes' most prescribed drugs by claims were Cephalexin, Lorazepam and Ondansetron HCl.
Has Dr. David Mark Hayes received payments from drug or device companies?
CMS Open Payments shows $258 in general payments to Dr. Hayes from 3 companies from 2016 to 2025. The largest total came from Merz North America, Inc.
How long has Dr. David Mark Hayes been practicing?
Dr. Hayes graduated from medical school in 1981, 45 years ago.
Selling to otolaryngology practices?
See otolaryngologists in Montana 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