Dr. William Michael Marsh, MD
- Medicare services, 2023
- 395
- Part D claims, 2026
- 929
- Industry payments
- $255
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 20201 N Scottsdale Healthcare Dr, Scottsdale, AZ 85255-4134
- Practice phone
- Call (480) 585-0880
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
William M. Marsh, MD, PC
Physician office · Scottsdale, Arizona
Find Dr. Marsh'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. William Michael Marsh is a general practice physician in Tempe, Arizona
Dr. Marsh practices at William M. Marsh, MD, PC in Scottsdale, Arizona.
Dr. Marsh's NPI, 1659385441, was assigned on July 28, 2006. Dr. Marsh graduated from Baylor College of Medicine in 1977. Dr. Marsh holds Arizona license 13237.
- NPI
- 1659385441NPI Registry (opens in a new tab)
- NPI enumeration date
- July 28, 2006
- NPI status
- Active
- Practice phone
- (480) 585-0880
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Michael Marsh practices in Scottsdale and Tempe
Dr. Marsh's primary practice is William M. Marsh, MD, PC, at 20201 N Scottsdale Healthcare Dr, Scottsdale, AZ 85255-4134. The practice phone is (480) 585-0880. The NPI Registry lists Dr. Marsh's practice address as 1255 W Washington St, Tempe, AZ 85281.
- William M. Marsh, MD, PCPrimary20201 N Scottsdale Healthcare Dr, Scottsdale, AZ 85255-4134Phone(480) 585-0880
- NPI Registry address1255 W Washington St, Tempe, AZ 85281 · Maricopa CountyPhone(480) 585-0880
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. William Michael Marsh is affiliated with 1 site of care
Dr. Marsh's primary practice is William M. Marsh, MD, PC in Scottsdale, Arizona.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Michael Marsh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marsh practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| William M. Marsh, MD, PC | 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. William Michael Marsh is one of 120 general practice physicians in Arizona
General practice is Dr. Marsh's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Marsh is licensed in Arizona.
Specialties and state licenses
- General practice, ArizonaPrimary
General practice physicians near Dr. Marsh
Counts of general practice physicians 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. William Michael Marsh billed Medicare for 395 services in 2023
CMS data shows 395 Medicare services from Dr. Marsh across 6 procedure codes in 2023. Medicare paid $11,248 for them. Every service was in an office.
Dr. Marsh's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 3582023: 19346%
- Surgery
- 2022: 1262023: 126No change
- Tests and treatments
- 2022: 522023: 3827%
- Other services
- 2022: 512023: 3825%
Dr. Marsh compared with the Arizona median for general practice physicians, 2023
- Dr. Marsh
- Arizona median
- Medicare services
- 395vs 21782% above
- Part D claims
- 571vs 619.4 times
Medians across 115 general practice physicians in Arizona with Dmand AI profiles that report each measure.
Dr. Marsh's most billed Medicare procedure codes, 2023
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. Marsh?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marsh and other general practice physicians in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Michael Marsh's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Marsh's median patient age at 78, with 41% women.
Dr. Marsh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women41%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. William Michael Marsh wrote 929 Medicare Part D claims in 2026
In 2026, Dr. Marsh wrote 929 Medicare Part D claims for 162 patients. 86% of them were for generic drugs. CMS names the drug for 571 of them, across 22 drugs with 11 or more claims each, at $33,501 in total drug cost. In 2023, CMS named 2,079 claims across 58 drugs.
Dr. Marsh's Part D claims by kind of drug, 2026
- Generic800 claims86%
- Brand-name129 claims14%
Dr. Marsh'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: 2,0792024: 57173%
Drugs named by CMS: 22 in 2024, 58 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), 2026 data
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. William Michael Marsh received $255 in industry payments from 2016 to 2020
CMS Open Payments shows 5 general payments to Dr. Marsh from 3 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Medartis Inc. paid the most, $111.
General payments to Dr. Marsh by program year, 2016 to 2020
Companies that paid Dr. Marsh the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Michael Marsh graduated from Baylor College of Medicine
Dr. Marsh graduated from Baylor College of Medicine in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Michael Marsh'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand 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 Data |
| 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) |
| 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. William Michael Marsh
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. William Michael Marsh's NPI number?
Dr. William Michael Marsh's NPI number is 1659385441. It was assigned on July 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Michael Marsh?
Dr. William Michael Marsh is a general practice physician in Tempe, Arizona. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. William Michael Marsh practice?
Dr. Marsh practices at 20201 N Scottsdale Healthcare Dr, Scottsdale, AZ 85255-4134. Dr. Marsh also practices at 1255 W Washington St, Tempe, AZ 85281. Dr. Marsh's primary practice is William M. Marsh, MD, PC in Scottsdale, Arizona.
What is Dr. William Michael Marsh's office phone number?
The practice phone on file for Dr. Marsh is (480) 585-0880. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. William Michael Marsh's email address?
Dmand AI checks professional and personal email addresses for Dr. Marsh through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. William Michael Marsh's medical license number?
Dr. Marsh holds Arizona license 13237.
Does Dr. William Michael Marsh accept Medicare?
Yes. CMS data shows Dr. Marsh billed Medicare for 395 services in 2023.
What services does Dr. William Michael Marsh bill to Medicare?
In 2023, Dr. Marsh's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. William Michael Marsh go to medical school?
Dr. Marsh graduated from Baylor College of Medicine in 1977.
What drugs does Dr. William Michael Marsh prescribe most?
In 2024 Medicare Part D data, Dr. Marsh's most prescribed drugs by claims were Ezetimibe, Atorvastatin Calcium and Levothyroxine Sodium.
Show 3 more questionsShow fewer questions
Has Dr. William Michael Marsh received payments from drug or device companies?
CMS Open Payments shows $255 in general payments to Dr. Marsh from 3 companies from 2016 to 2020. The largest total came from Medartis Inc.
How long has Dr. William Michael Marsh been practicing?
Dr. Marsh graduated from medical school in 1977, 49 years ago.
What EHR does Dr. William Michael Marsh's practice use?
Dmand AI tracks the EHR system at William M. Marsh, MD, PC. The vendor and product are available with a free Dmand AI account.
Selling to general practice practices?
See general practice physicians in Arizona 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