Dr. Michael D. Mason, MD
- Part D claims, 2024
- 6,099
- Hospital affiliations
- 2
- Industry payments
- $278
- Medical group
- 1
- Insurance carriers
- 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. Mason's professional email, personal email and mobile number
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Dr. Michael D. Mason is a family medicine physician in Vallejo, California
Dr. Mason practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Mason's NPI, 1528116506, was assigned on January 8, 2007. Dr. Mason graduated from Keck School of Medicine of USC in 1994. Dr. Mason holds California license A55768.
- NPI
- 1528116506NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981728383
- NPI enumeration date
- January 8, 2007
- 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
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael D. Mason practices at Vallejo Medical Center in Vallejo, California
Dr. Mason's 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. Michael D. Mason is affiliated with 4 sites of care and 1 medical group
Dr. Mason's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dr. Mason is also affiliated with Kaiser Permanente Woodland Hills Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Mason to 1 more 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. Michael D. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices, 4 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 |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael D. Mason is one of 15,680 family medicine physicians in California
Family medicine is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Mason is board certified in family medicine by the American Board of Family Medicine. Dr. Mason is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Mason
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. Michael D. Mason's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 80, with 61% women.
Dr. Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women61%
- Men39%
Source: Dmand AI Patient Panel Data
Dr. Michael D. Mason wrote 6,099 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 6,099 Medicare Part D claims for 637 patients. 87% of them were for generic drugs. CMS names the drug for 5,602 of them, across 99 drugs with 11 or more claims each, at $249,555 in total drug cost. In 2023, CMS named 5,229 claims across 90 drugs.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic5,320 claims87%
- Brand-name757 claims12%
- Other22 claims0%
Dr. Mason'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. Mason's Part D claims, 2024
- Opioids1%47 of 6,099 claims
- Antibiotics4%221 of 6,099 claims
- Antipsychotics, patients 65 and over2%149 of 6,099 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: 5,2292024: 5,6027%
Drugs named by CMS: 99 in 2024, 90 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. Michael D. Mason takes part in Medicare
Dr. Mason 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. Michael D. Mason received $278 in industry payments from 2018 to 2019
CMS Open Payments shows 4 general payments to Dr. Mason from 1 drug or device company from 2018 to 2019. Food and beverage make up the largest share, 53% of the total. Stryker Corporation paid the most, $278.
General payments to Dr. Mason by program year, 2018 to 2019
General payments to Dr. Mason by kind, 2018 to 2019
- Food and beverage$14653%
- Travel and lodging$13247%
Companies that paid Dr. Mason the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael D. Mason has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Mason, most recently CMS Stage 1 2012 in 2013.
Awards and honors for Dr. Mason
- 2013
- CMS Stage 1 2012
- 2012
- NCQA DRP
- NCQA HSRP
Source: Dmand AI Professional Profile Data
Dr. Michael D. Mason graduated from Keck School of Medicine of USC
Dr. Mason graduated from Keck School of Medicine of USC in 1994.
- Medical school
- Board certified in family medicine
- Board certified in geriatric medicine
Source: Dmand AI Professional Profile Data
Dr. Michael D. Mason accepts plans from 1 insurance carrier
Dr. Mason is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Mason accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael D. Mason'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Michael D. Mason
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. Michael D. Mason's NPI number?
Dr. Michael D. Mason's NPI number is 1528116506. It was assigned on January 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael D. Mason?
Dr. Michael D. Mason 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. Michael D. Mason practice?
Dr. Mason practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Mason's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Mason to 1 home health agency and 1 hospice.
What is Dr. Michael D. Mason's office phone number?
The practice phone on file for Dr. Mason is (707) 651-1000.
What is Dr. Michael D. Mason's medical license number?
Dr. Mason holds California license A55768.
Which hospitals is Dr. Michael D. Mason affiliated with?
Dr. Mason practices at Vallejo Medical Center in Vallejo, California. Dr. Mason is also affiliated with Kaiser Permanente Woodland Hills Medical Center.
What medical group is Dr. Michael D. Mason part of?
Dr. Mason is linked to The Permanente Medical Group, Inc.
Does Dr. Michael D. Mason accept Medicare?
Yes. CMS lists Dr. Mason as accepting Medicare assignment.
Is Dr. Michael D. Mason board certified?
Yes. Dr. Mason is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Michael D. Mason go to medical school?
Dr. Mason graduated from Keck School of Medicine of USC in 1994.
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What drugs does Dr. Michael D. Mason prescribe most?
In 2024 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Atorvastatin Calcium, Furosemide and Tamsulosin HCl.
Has Dr. Michael D. Mason received payments from drug or device companies?
CMS Open Payments shows $278 in general payments to Dr. Mason from 1 company from 2018 to 2019. The largest total came from Stryker Corporation.
How long has Dr. Michael D. Mason been practicing?
Dr. Mason graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Michael D. Mason accept?
Dr. Mason is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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