Ryan Thomas Callahan, DPM
- Part D claims, 2024
- 11
- Hospital affiliations
- 1
- Industry payments
- $1,368
- Medical groups
- 5
- Year NPI issued
- 2021
- Practice address
- 505 Parnassus Ave, Box 0296, San Francisco, CA 94143
- Practice phone
- Call (415) 353-2733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Ryan Callahan'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.
Ryan Thomas Callahan is a podiatrist in San Francisco, California
Ryan Callahan practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
Ryan Callahan's NPI, 1265010284, was assigned on March 31, 2021.
- NPI
- 1265010284NPI Registry (opens in a new tab)
- NPI enumeration date
- March 31, 2021
- NPI status
- Active
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Ryan Thomas Callahan practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
Ryan Callahan's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.
- UCSF Helen Diller Medical Center at Parnassus Heights505 Parnassus Ave, Box 0296, San Francisco, CA 94143 · San Francisco CountyPhone(415) 353-2733
Source: Dmand AI Affiliation Data
Ryan Thomas Callahan is affiliated with 1 site of care and 5 medical groups
Ryan Callahan's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Ryan Callahan to 4 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Ryan Thomas Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Ryan Callahan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSF Helen Diller Medical Center at Parnassus Heights | Available with a free account |
| +4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Ryan Thomas Callahan is one of 745 podiatrists in California
Podiatrist is Ryan Callahan's primary specialty in the NPI Registry, under taxonomy code 213E00000X.
Specialties and state licenses
- PodiatristPrimary
Podiatrists near Ryan Callahan
Counts of podiatrists 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
Ryan Thomas Callahan's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Ryan Callahan's median patient age at 75, with 18% women.
Ryan Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women18%
- Men82%
Source: Dmand AI Patient Panel Data
Ryan Thomas Callahan wrote 11 Medicare Part D claims in 2024
In 2024, Ryan Callahan wrote 11 Medicare Part D claims. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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.
Ryan Thomas Callahan received $1,368 in industry payments in 2025
CMS Open Payments shows 2 general payments to Ryan Callahan from 2 drug and device companies in 2025. Travel and lodging make up the largest share, 99% of the total. Stryker Corporation paid the most, $1,353.
General payments to Ryan Callahan by kind, 2025 to 2025
- Travel and lodging$1,35399%
- Food and beverage$151%
Companies that paid Ryan Callahan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Ryan Thomas Callahan'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 (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 Ryan Thomas Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Ryan Thomas Callahan's NPI number?
Ryan Thomas Callahan's NPI number is 1265010284. It was assigned on March 31, 2021, and it is active in the NPI Registry.
What does Ryan Thomas Callahan specialize in?
Ryan Thomas Callahan is a podiatrist in San Francisco, California. The primary specialty in the NPI Registry is Podiatrist (taxonomy code 213E00000X).
Where does Ryan Thomas Callahan practice?
Ryan Callahan practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Ryan Callahan's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links Ryan Callahan to 4 medical groups.
What is Ryan Thomas Callahan's office phone number?
The practice phone on file for Ryan Callahan is (415) 353-2733.
Which hospitals is Ryan Thomas Callahan affiliated with?
Ryan Callahan practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California.
What medical group is Ryan Thomas Callahan part of?
Ryan Callahan is linked to The Permanente Medical Group, Inc. Dmand AI links Ryan Callahan to 4 more medical groups.
Has Ryan Thomas Callahan received payments from drug or device companies?
CMS Open Payments shows $1,368 in general payments to Ryan Callahan from 2 companies from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Ryan Thomas Callahan been practicing?
Ryan Callahan's NPI was assigned in 2021.
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