Stephen Koryo An
- Medicare patients, 2024
- 442
- Part D claims, 2024
- 167
- MIPS score, 2024
- 89
- Industry payments
- $204
- Medical group
- 1
- Practice address
- 20130 Lake Chabot Rd, Castro Valley, CA 94546
- Practice phone
- Call (510) 889-1700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Associated Urology Medical Group,Inc.
Castro Valley, California
Find Stephen An's professional email, personal email and mobile number
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Stephen Koryo An is a podiatric surgeon in Castro Valley, California
Stephen An practices at Associated Urology Medical Group,Inc. in Castro Valley, California.
Stephen An's NPI, 1467835991, was assigned on July 1, 2015. Stephen An graduated from California School of Podiatric Medicine in 2015. Stephen An holds California license E5456.
- NPI
- 1467835991NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254688146
- NPI enumeration date
- July 1, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 889-1700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Stephen Koryo An practices at Associated Urology Medical Group,Inc. in Castro Valley, California
Stephen An's primary practice is Associated Urology Medical Group,Inc., at 20130 Lake Chabot Rd, Castro Valley, CA 94546 in Alameda County. The practice phone is (510) 889-1700.
- Associated Urology Medical Group,Inc.20130 Lake Chabot Rd, Castro Valley, CA 94546 · Alameda CountyPhone(510) 889-1700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Stephen Koryo An is affiliated with 1 site of care and 1 medical group
Stephen An's primary practice is Associated Urology Medical Group,Inc. in Castro Valley, California. The medical group on file is Bay Area Foot Care.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Stephen Koryo An's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephen An practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Associated Urology Medical Group,Inc. | Available with a free account |
Source: Dmand AI Technology Install Data
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Stephen Koryo An is one of 1,112 podiatric surgeons in California
Foot and ankle surgery is Stephen An's primary specialty in the NPI Registry, under taxonomy code 213ES0103X. Stephen An is licensed in California.
Specialties and state licenses
- Foot and ankle surgery podiatrist, CaliforniaPrimary
Podiatric surgeons near Stephen An
Counts of podiatric surgeons 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
Stephen Koryo An treated 442 Medicare patients in 2024, average age 79
CMS counts 442 Medicare patients who saw Stephen An in 2024. The largest group is 75 to 84, with 173 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Stephen An's median patient age at 62, with 59% women.
Stephen An's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Stephen An's Medicare patients by sex, 2024
- Women25057%
- Men19243%
Chronic conditions among Stephen An's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Diabetes31%
- Ischemic heart disease31%
- Atrial fibrillation25%
- Chronic kidney disease25%
- Osteoporosis24%
Share of Medicare patients with each condition. A patient can have several.
Stephen An's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women59%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Stephen Koryo An wrote 167 Medicare Part D claims in 2024
In 2024, Stephen An wrote 167 Medicare Part D claims for 95 patients. 99% of them were for generic drugs.
Stephen An's Part D claims by kind of drug, 2024
- Generic166 claims99%
- Brand-name and other1 claims1%
Drug classes CMS tracks in Stephen An's Part D claims, 2024
- Antibiotics26%44 of 167 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Stephen Koryo An scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Stephen An for performance year 2024, reported as part of a group. Stephen An accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 477 procedures of removal or shaving of skin growth by Stephen An, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Stephen An's MIPS scores, performance year 2024
- 89of 100Final score
- 68of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Stephen An ranks in Medicare procedure volume
- Removal of nail tissue
- 86th percentile610 procedures
- Removal or shaving of skin growth
- 95th percentile477 procedures
- Removal of tissue
- 89th percentile158 procedures
- Removal of skin lesions
- 71st percentile46 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Stephen Koryo An received $204 in industry payments in 2025
CMS Open Payments shows 10 general payments to Stephen An from 6 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $71.
Companies that paid Stephen An the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Stephen Koryo An graduated from California School of Podiatric Medicine
Stephen An graduated from California School of Podiatric Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Stephen Koryo An'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 Stephen Koryo An
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Stephen Koryo An's NPI number?
Stephen Koryo An's NPI number is 1467835991. It was assigned on July 1, 2015, and it is active in the NPI Registry.
What does Stephen Koryo An specialize in?
Stephen Koryo An is a podiatric surgeon in Castro Valley, California. The primary specialty in the NPI Registry is Foot & Ankle Surgery Podiatrist (taxonomy code 213ES0103X).
Where does Stephen Koryo An practice?
Stephen An practices at 20130 Lake Chabot Rd, Castro Valley, CA 94546. Stephen An's primary practice is Associated Urology Medical Group,Inc. in Castro Valley, California.
What is Stephen Koryo An's office phone number?
The practice phone on file for Stephen An is (510) 889-1700.
What is Stephen Koryo An's medical license number?
Stephen An holds California license E5456.
What medical group is Stephen Koryo An part of?
Stephen An is linked to Bay Area Foot Care.
Does Stephen Koryo An accept Medicare?
Yes. CMS lists Stephen An as accepting Medicare assignment.
What is Stephen Koryo An's MIPS score?
Stephen An's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
How many Medicare patients does Stephen Koryo An see?
CMS counts 442 Medicare patients who saw Stephen An in 2024, with an average age of 79.
Where did Stephen Koryo An go to medical school?
Stephen An graduated from California School of Podiatric Medicine in 2015.
Has Stephen Koryo An received payments from drug or device companies?
CMS Open Payments shows $204 in general payments to Stephen An from 6 companies from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Stephen Koryo An been practicing?
Stephen An graduated from medical school in 2015, 11 years ago.
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