Dr. Irene A. Mason, MD
- Part D claims, 2024
- 174
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 2
- State license
- 1
- Practice address
- 901 Nevin Ave, Richmond, CA 94801
- Practice phone
- Call (510) 307-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Richmond Medical Center
Richmond, California
Find Dr. Mason'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. Irene A. Mason is an OB-GYN in Richmond, California
Dr. Mason practices at Richmond Medical Center in Richmond, California.
Dr. Mason's NPI, 1659509768, was assigned on June 26, 2009. Dr. Mason graduated from Drexel University College Of Medicine in 2007. Dr. Mason holds California license A107862.
- NPI
- 1659509768NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183895568
- NPI enumeration date
- June 26, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 307-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Irene A. Mason practices at Richmond Medical Center in Richmond, California
Dr. Mason's primary practice is Richmond Medical Center, at 901 Nevin Ave, Richmond, CA 94801 in Contra Costa County. The practice phone is (510) 307-1555.
- Richmond Medical Center901 Nevin Ave, Richmond, CA 94801 · Contra Costa CountyPhone(510) 307-1555
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Irene A. Mason is affiliated with 2 sites of care and 1 medical group
Dr. Mason's primary practice is Richmond Medical Center in Richmond, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Mason to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Irene A. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mason practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Richmond Medical 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. Irene A. Mason is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Mason's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Mason is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dr. Mason is licensed in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists menopause and vaginal infection among the conditions Dr. Mason treats.
OB-GYNs near Dr. Mason
Counts of OB-GYNs 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. Irene A. Mason's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Dr. Mason's median patient age at 37, with 100% 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 37
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Irene A. Mason wrote 174 Medicare Part D claims in 2024
In 2024, Dr. Mason wrote 174 Medicare Part D claims for 79 patients. 89% of them were for generic drugs. CMS names the drug for 109 of them, across 5 drugs with 11 or more claims each, at $6,259 in total drug cost. In 2023, CMS named 100 claims across 6 drugs.
Dr. Mason's Part D claims by kind of drug, 2024
- Generic155 claims89%
- Brand-name19 claims11%
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
- Antibiotics7%13 of 174 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: 1002024: 1099%
Drugs named by CMS: 5 in 2024, 6 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. Irene A. 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)
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. Irene A. Mason graduated from Drexel University College Of Medicine
Dr. Mason graduated from Drexel University College Of Medicine in 2007.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Irene A. Mason accepts plans from 2 insurance carriers
Dr. Mason is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Mason accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Irene A. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| 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. Irene A. 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. Irene A. Mason's NPI number?
Dr. Irene A. Mason's NPI number is 1659509768. It was assigned on June 26, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Irene A. Mason?
Dr. Irene A. Mason is an OB-GYN in Richmond, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Irene A. Mason practice?
Dr. Mason practices at 901 Nevin Ave, Richmond, CA 94801. Dr. Mason's primary practice is Richmond Medical Center in Richmond, California. Dmand AI also links Dr. Mason to 1 group practice or clinic.
What is Dr. Irene A. Mason's office phone number?
The practice phone on file for Dr. Mason is (510) 307-1555.
What is Dr. Irene A. Mason's medical license number?
Dr. Mason holds California license A107862.
What medical group is Dr. Irene A. Mason part of?
Dr. Mason is linked to The Permanente Medical Group, Inc.
Does Dr. Irene A. Mason accept Medicare?
Yes. CMS lists Dr. Mason as accepting Medicare assignment.
Is Dr. Irene A. Mason board certified?
Yes. Dr. Mason is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
Where did Dr. Irene A. Mason go to medical school?
Dr. Mason graduated from Drexel University College Of Medicine in 2007.
What drugs does Dr. Irene A. Mason prescribe most?
In 2024 Medicare Part D data, Dr. Mason's most prescribed drugs by claims were Estradiol, Acyclovir and Trospium Chloride.
How long has Dr. Irene A. Mason been practicing?
Dr. Mason graduated from medical school in 2007, 19 years ago.
What insurance does Dr. Irene A. Mason accept?
Dr. Mason is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to obstetrics and gynecology practices?
See OB-GYNs 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