Dr. William Michael Munion, MD
- Medicare services, 2024
- 160
- Medicare patients, 2024
- 138
- Part D claims, 2024
- 248
- Hospital affiliations
- 3
- Medical groups
- 3
- Practice address
- 400 N McDowell Blvd, Petaluma, CA 94954
- Practice phone
- Call (707) 778-1111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Munion's professional email, personal email and mobile number
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Dr. William Michael Munion is an emergency medicine physician in Petaluma, California
Dr. Munion practices at Petaluma Valley Hospital in Petaluma, California, part of Providence Health & Services.
Dr. Munion's NPI, 1255829784, was assigned on April 30, 2018. Dr. Munion graduated from University of Arizona College of Medicine in 2018. Dr. Munion holds Arizona license 63049.
- NPI
- 1255829784NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739501933
- NPI enumeration date
- April 30, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 778-1111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Michael Munion practices at Petaluma Valley Hospital in Petaluma, California
Dr. Munion's primary practice is Petaluma Valley Hospital, at 400 N McDowell Blvd, Petaluma, CA 94954 in Sonoma County. The practice phone is (707) 778-1111.
- Petaluma Valley Hospital400 N McDowell Blvd, Petaluma, CA 94954 · Sonoma CountyPhone(707) 778-1111
Source: Dmand AI Affiliation Data
Dr. William Michael Munion is affiliated with 4 sites of care and 3 medical groups
Dr. Munion's primary practice is Petaluma Valley Hospital in Petaluma, California, part of Providence Health & Services. Dr. Munion is also affiliated with Dignity Health - Arizona General Hospital Mesa. The medical group on file is Napa Valley Emergency Medical Group. Dmand AI also links Dr. Munion to 1 more hospital, 2 medical groups and 1 breast imaging center, 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. William Michael Munion's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Munion practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Petaluma Valley Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Michael Munion is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Munion's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Munion's licenses on file in 2 states: Arizona and Texas.
Specialties and state licenses
- Emergency medicine, ArizonaPrimary
- Texas license
Emergency medicine physicians near Dr. Munion
Counts of emergency medicine 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 Munion billed Medicare for 160 services in 2024
CMS data shows 160 Medicare services from Dr. Munion across 4 procedure codes in 2024, for 138 Medicare patients. Medicare paid $14,449 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Munion's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3122024: 13656%
- Tests and treatments
- 2023: 02024: 24
Dr. Munion compared with the California median for emergency medicine physicians, 2024
- Dr. Munion
- California median
- Medicare services
- 160vs 26540% below
- Medicare patients
- 138vs 24343% below
- Part D claims
- 135vs 622.2 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Munion'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Michael Munion treated 138 Medicare patients in 2024, average age 74
CMS counts 138 Medicare patients who saw Dr. Munion in 2024. The largest group is 65 to 74, with 53 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.43, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Munion's median patient age at 47, with 57% women.
Dr. Munion's Medicare patients by age, 2024
Dr. Munion's Medicare patients by sex, 2024
- Women9468%
- Men4432%
Chronic conditions among Dr. Munion's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Chronic kidney disease32%
- Diabetes29%
- Osteoporosis26%
- Anxiety25%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Munion's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Michael Munion wrote 248 Medicare Part D claims in 2024
In 2024, Dr. Munion wrote 248 Medicare Part D claims for 152 patients. 95% of them were for generic drugs. CMS names the drug for 135 of them, across 6 drugs with 11 or more claims each, at $767 in total drug cost. In 2023, CMS named 249 claims across 9 drugs.
Dr. Munion's Part D claims by kind of drug, 2024
- Generic235 claims95%
- Brand-name and other13 claims5%
Dr. Munion'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. Munion's Part D claims, 2024
- Opioids7%18 of 248 claims
- Antibiotics36%89 of 248 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: 2492024: 13546%
Drugs named by CMS: 6 in 2024, 9 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. William Michael Munion takes part in Medicare
Dr. Munion accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Michael Munion graduated from University of Arizona College of Medicine
Dr. Munion graduated from University of Arizona College of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Michael Munion'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) |
| 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 Munion
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 Munion's NPI number?
Dr. William Michael Munion's NPI number is 1255829784. It was assigned on April 30, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. William Michael Munion?
Dr. William Michael Munion is an emergency medicine physician in Petaluma, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. William Michael Munion practice?
Dr. Munion practices at 400 N McDowell Blvd, Petaluma, CA 94954. Dr. Munion's primary practice is Petaluma Valley Hospital in Petaluma, California, part of Providence Health & Services. Dmand AI also links Dr. Munion to 1 hospital, 2 medical groups and 1 breast imaging center.
What is Dr. William Michael Munion's office phone number?
The practice phone on file for Dr. Munion is (707) 778-1111.
What is Dr. William Michael Munion's medical license number?
Dr. Munion holds Arizona license 63049, one of the licenses on file in 2 states.
Which states has Dr. William Michael Munion been licensed in?
Dmand AI has state licenses on file for Dr. Munion in Arizona and Texas.
Which hospitals is Dr. William Michael Munion affiliated with?
Dr. Munion practices at Petaluma Valley Hospital in Petaluma, California. Dr. Munion is also affiliated with Dignity Health - Arizona General Hospital Mesa. Dmand AI links Dr. Munion to 1 more hospital.
What medical group is Dr. William Michael Munion part of?
Dr. Munion is linked to Napa Valley Emergency Medical Group. Dmand AI links Dr. Munion to 2 more medical groups.
Does Dr. William Michael Munion accept Medicare?
Yes. CMS data shows Dr. Munion billed Medicare for 160 services in 2024, and Dr. Munion accepts Medicare assignment.
How many Medicare patients does Dr. William Michael Munion see?
CMS counts 138 Medicare patients who saw Dr. Munion in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Dr. William Michael Munion bill to Medicare?
In 2024, Dr. Munion's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and heart test or procedure (93010).
Where did Dr. William Michael Munion go to medical school?
Dr. Munion graduated from University of Arizona College of Medicine in 2018.
What drugs does Dr. William Michael Munion prescribe most?
In 2024 Medicare Part D data, Dr. Munion's most prescribed drugs by claims were Prednisone, Amoxicillin-Clavulanate Potass and Ondansetron ODT.
How long has Dr. William Michael Munion been practicing?
Dr. Munion graduated from medical school in 2018, 8 years ago.
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