Regina Doi
- Medicare services, 2024
- 862
- Medicare patients, 2026
- 206
- Part D claims, 2026
- 254
- MIPS score, 2026
- 90
- Hospital affiliations
- 2
- Practice address
- 1630 Herndon Avenue, Suite 100, Fresno, CA 93720
- Practice phone
- Call (559) 449-2888
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Summit Surgical - Fresno
Surgery Center - Medicare-Certified · Fresno, California
Find Regina Doi'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.
Regina Doi is a physician assistant in Fresno, California
Regina Doi practices at Summit Surgical - Fresno in Fresno, California.
Regina Doi's NPI, 1427830686, was assigned on October 20, 2023. Regina Doi holds California license 63537.
- NPI
- 1427830686NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315396306
- NPI enumeration date
- October 20, 2023
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (559) 449-2888
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 29
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Regina Doi practices at Summit Surgical - Fresno in Fresno, California
Regina Doi's primary practice is Summit Surgical - Fresno, at 1630 Herndon Avenue, Suite 100, Fresno, CA 93720. The practice phone is (559) 449-2888.
- Summit Surgical - Fresno1630 Herndon Avenue, Suite 100, Fresno, CA 93720Phone(559) 449-2888
Source: Dmand AI Affiliation Data
Regina Doi is affiliated with 4 sites of care and 1 medical group
Regina Doi's primary practice is Summit Surgical - Fresno in Fresno, California. Regina Doi is also affiliated with Saint Agnes Medical Center. The medical group on file is Santé Foundation Medical Group. Dmand AI also links Regina Doi to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Regina Doi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Regina Doi practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Summit Surgical - Fresno | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Regina Doi is one of 11,482 physician assistants in California
Physician assistant is Regina Doi's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Regina Doi is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Regina Doi
Counts of physician assistants 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
Regina Doi billed Medicare for 862 services in 2024
CMS data shows 862 Medicare services from Regina Doi across 14 procedure codes in 2024, for 206 Medicare patients. Medicare paid $18,893 for them.
Regina Doi's Medicare services by type, 2024
- Drugs given in the office454
- Office and hospital visits159
- Imaging132
- Surgery102
- Other services15
Where Regina Doi's Medicare services took place, 2024
- In an office82796%
- In a facility354%
Regina Doi compared with the California median for physician assistants, 2024
- Regina Doi
- California median
- Medicare services
- 862vs 2044.2 times
- Medicare patients
- 206vs 10596% above
- Part D claims
- 225vs 2437% below
Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.
Regina Doi'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
Regina Doi treated 206 Medicare patients in 2026, average age 73
CMS counts 206 Medicare patients who saw Regina Doi in 2026. The largest group is 65 to 74, with 106 patients. 75% of them have arthritis, and 75% have high blood pressure. 14% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Regina Doi's median patient age at 60, with 60% women.
Regina Doi's Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
Regina Doi's Medicare patients by sex, 2026
- Women11857%
- Men8843%
Chronic conditions among Regina Doi's Medicare patients, 2026
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease38%
- Diabetes37%
- Mood disorders26%
- Anxiety25%
- Depression25%
Share of Medicare patients with each condition. A patient can have several.
Regina Doi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Regina Doi wrote 254 Medicare Part D claims in 2026
In 2026, Regina Doi wrote 254 Medicare Part D claims for 203 patients. 100% of them were for generic drugs. CMS names the drug for 225 of them, across 4 drugs with 11 or more claims each, at $988 in total drug cost.
Regina Doi'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 Regina Doi's Part D claims, 2026
- Opioids89%227 of 254 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
Regina Doi scored 90 out of 100 in Medicare's MIPS program for 2026
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Regina Doi for performance year 2026, reported as part of a group. Regina Doi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Regina Doi's MIPS scores, performance year 2026
- 90of 100Final score
- 87of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2026 data
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Regina Doi received $695 in industry payments from 2024 to 2025
CMS Open Payments shows 9 general payments to Regina Doi from 6 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $130.
General payments to Regina Doi by program year, 2024 to 2025
Companies that paid Regina Doi the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Regina Doi'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 Regina Doi
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Regina Doi's NPI number?
Regina Doi's NPI number is 1427830686. It was assigned on October 20, 2023, and it is active in the NPI Registry.
What does Regina Doi specialize in?
Regina Doi is a physician assistant in Fresno, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Regina Doi practice?
Regina Doi practices at 1630 Herndon Avenue, Suite 100, Fresno, CA 93720. Regina Doi's primary practice is Summit Surgical - Fresno in Fresno, California. Dmand AI also links Regina Doi to 1 hospital and 1 group practice or clinic, and a free account names each one.
What is Regina Doi's office phone number?
The practice phone on file for Regina Doi is (559) 449-2888. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Regina Doi's email address?
Dmand AI checks professional and personal email addresses for Regina Doi through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Regina Doi's medical license number?
Regina Doi holds California license 63537.
Which hospitals is Regina Doi affiliated with?
Regina Doi is affiliated with Saint Agnes Medical Center. Dmand AI links Regina Doi to 1 more hospital, named with a free account.
What medical group is Regina Doi part of?
Regina Doi is linked to Santé Foundation Medical Group.
Who does Regina Doi practice with?
Dmand AI links 370 HCPs to Regina Doi's primary medical group, 40 of them physician assistants. A free account lists them, with verified contacts.
Does Regina Doi accept Medicare?
Yes. CMS data shows Regina Doi billed Medicare for 862 services in 2024, and Regina Doi accepts Medicare assignment.
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What is Regina Doi's MIPS score?
Regina Doi's MIPS final score for performance year 2026 is 90 out of 100, reported as part of a group.
How many Medicare patients does Regina Doi see?
CMS counts 206 Medicare patients who saw Regina Doi in 2026, with an average age of 73.
What services does Regina Doi bill to Medicare?
In 2024, Regina Doi's most billed Medicare services were injected or infused drug (J1010), injected or infused drug (J1100) and office visit, established patient (99213).
What drugs does Regina Doi prescribe most?
In 2024 Medicare Part D data, Regina Doi's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Tramadol HCl and Acetaminophen-Codeine.
Has Regina Doi received payments from drug or device companies?
CMS Open Payments shows $695 in general payments to Regina Doi from 6 companies from 2024 to 2025. The largest total came from Abiomed.
How long has Regina Doi been practicing?
Regina Doi graduated from medical school in 2023, 3 years ago.
What EHR does Regina Doi's practice use?
Dmand AI tracks the EHR system at Summit Surgical - Fresno and at 3 more affiliated sites. The vendor and product are available with a free Dmand AI account.
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