Dr. William Earl Maes, MD
- Medicare services, 2023
- 13
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 876
- Hospital affiliations
- 3
- Medical group
- 1
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Maes' 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 Earl Maes is a family medicine physician in Vallejo, California
Dr. Maes practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Maes' NPI, 1114488525, was assigned on March 28, 2019. Dr. Maes holds Washington license MD61476823.
- NPI
- 1114488525NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375911878
- NPI enumeration date
- March 28, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Earl Maes practices at Vallejo Medical Center in Vallejo, California
Dr. Maes' primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. William Earl Maes is affiliated with 6 sites of care and 1 medical group
Dr. Maes' primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dr. Maes is also affiliated with Swedish First Hill Campus. The medical group on file is Neighborcare Health. Dmand AI also links Dr. Maes to 1 more hospital, 1 community health center, 1 home health agency and 1 hospice, 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 Earl Maes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maes practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +5 more affiliated sites | 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 Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Earl Maes is one of 15,680 family medicine physicians in California
Family medicine is Dr. Maes' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Maes is licensed in Washington.
Specialties and state licenses
- Family medicine, WashingtonPrimary
Family medicine physicians near Dr. Maes
Counts of family 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 Earl Maes billed Medicare for 13 services in 2023
CMS data shows 13 Medicare services from Dr. Maes across 1 procedure code in 2023, for 22 Medicare patients. Medicare paid $904 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Maes compared with the California median for family medicine physicians, 2023
- Dr. Maes
- California median
- Medicare services
- 13vs 24695% below
- Medicare patients
- 22vs 11881% below
- Part D claims
- 436vs 83348% below
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Maes' 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. Maes?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maes and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Earl Maes treated 22 Medicare patients in 2024, average age 69
CMS counts 22 Medicare patients who saw Dr. Maes in 2024. 75% of them have high blood pressure, and 68% have high cholesterol. Their average risk score is 2.49, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Maes' median patient age at 52, with 42% women.
Chronic conditions among Dr. Maes' Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Diabetes64%
- Mood disorders50%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women42%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Earl Maes wrote 876 Medicare Part D claims in 2024
In 2024, Dr. Maes wrote 876 Medicare Part D claims for 152 patients. 88% of them were for generic drugs. CMS names the drug for 436 of them, across 17 drugs with 11 or more claims each, at $5,971 in total drug cost. In 2023, CMS named 175 claims across 10 drugs.
Dr. Maes' Part D claims by kind of drug, 2024
- Generic769 claims88%
- Brand-name84 claims10%
- Other23 claims3%
Dr. Maes' 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. Maes' Part D claims, 2024
- Antibiotics2%14 of 876 claims
- Antipsychotics, patients 65 and over1%11 of 876 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: 1752024: 436149%
Drugs named by CMS: 17 in 2024, 10 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 Earl Maes takes part in Medicare
Dr. Maes 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)
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.
Sources for Dr. William Earl Maes'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) |
| 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 Earl Maes
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 Earl Maes' NPI number?
Dr. William Earl Maes' NPI number is 1114488525. It was assigned on March 28, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. William Earl Maes?
Dr. William Earl Maes is a family medicine physician in Vallejo, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William Earl Maes practice?
Dr. Maes practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Maes' primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Maes to 1 hospital, 1 community health center, 1 home health agency and 1 hospice.
What is Dr. William Earl Maes' office phone number?
The practice phone on file for Dr. Maes is (707) 651-1000.
What is Dr. William Earl Maes' medical license number?
Dr. Maes holds Washington license MD61476823.
Which hospitals is Dr. William Earl Maes affiliated with?
Dr. Maes practices at Vallejo Medical Center in Vallejo, California. Dr. Maes is also affiliated with Swedish First Hill Campus. Dmand AI links Dr. Maes to 1 more hospital.
What medical group is Dr. William Earl Maes part of?
Dr. Maes is linked to Neighborcare Health.
Does Dr. William Earl Maes accept Medicare?
Yes. CMS data shows Dr. Maes billed Medicare for 13 services in 2023, and Dr. Maes accepts Medicare assignment.
How many Medicare patients does Dr. William Earl Maes see?
CMS counts 22 Medicare patients who saw Dr. Maes in 2024, with an average age of 69.
What services does Dr. William Earl Maes bill to Medicare?
In 2023, Dr. Maes' most billed Medicare services were hospital inpatient care (99238).
What drugs does Dr. William Earl Maes prescribe most?
In 2024 Medicare Part D data, Dr. Maes' most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Lisinopril.
How long has Dr. William Earl Maes been practicing?
Dr. Maes graduated from medical school in 2019, 7 years ago.
Selling to family medicine practices?
See family medicine physicians in California 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