Mathew Duffey
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2019
- Practice address
- 673 S Auburn St, Grass Valley, CA 95945
- Practice phone
- Call (530) 913-5054
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sierra Family Therapy Centers, Inc.
Grass Valley, California
Find Mathew Duffey'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.
Mathew Duffey is a marriage and family therapist in Grass Valley, California
Mathew Duffey practices at Sierra Family Therapy Centers, Inc. in Grass Valley, California.
Mathew Duffey's NPI, 1003457151, was assigned on September 30, 2019. Mathew Duffey holds California license 156206.
- NPI
- 1003457151NPI Registry (opens in a new tab)
- NPI enumeration date
- September 30, 2019
- NPI status
- Active
- Practice phone
- (530) 913-5054
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Mathew Duffey practices at Sierra Family Therapy Centers, Inc. in Grass Valley, California
Mathew Duffey's primary practice is Sierra Family Therapy Centers, Inc., at 673 S Auburn St, Grass Valley, CA 95945 in Nevada County. The practice phone is (530) 913-5054.
- Sierra Family Therapy Centers, Inc.673 S Auburn St, Grass Valley, CA 95945 · Nevada CountyPhone(530) 913-5054
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mathew Duffey is affiliated with 2 sites of care and 2 medical groups
Mathew Duffey's primary practice is Sierra Family Therapy Centers, Inc. in Grass Valley, California. The medical group on file is Sensible Care. Dmand AI also links Mathew Duffey to 1 more group practice or clinic and 1 medical group, each 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 Mathew Duffey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mathew Duffey practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sierra Family Therapy Centers, Inc. | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mathew Duffey is one of 13,197 marriages and family therapists in California
Marriage and family therapist is Mathew Duffey's primary specialty in the NPI Registry, under taxonomy code 106H00000X. Mathew Duffey is licensed in California.
Specialties and state licenses
- Marriage and family therapist, CaliforniaPrimary
Marriages and family therapists near Mathew Duffey
Counts of marriages and family therapists 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
Mathew Duffey's patients have a median age of 29
Across all payers, Dmand AI patient panel data puts Mathew Duffey's median patient age at 29, with 27% women.
Mathew Duffey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 29
Patient panel by sex, all payers
- Women27%
- Men54%
Source: Dmand AI Patient Panel Data
Sources for Mathew Duffey'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 |
| 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 Mathew Duffey
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What is Mathew Duffey's NPI number?
Mathew Duffey's NPI number is 1003457151. It was assigned on September 30, 2019, and it is active in the NPI Registry.
What does Mathew Duffey specialize in?
Mathew Duffey is a marriage and family therapist in Grass Valley, California. The primary specialty in the NPI Registry is Marriage & Family Therapist (taxonomy code 106H00000X).
Where does Mathew Duffey practice?
Mathew Duffey practices at 673 S Auburn St, Grass Valley, CA 95945. Mathew Duffey's primary practice is Sierra Family Therapy Centers, Inc. in Grass Valley, California. Dmand AI also links Mathew Duffey to 1 group practice or clinic and 1 medical group.
What is Mathew Duffey's office phone number?
The practice phone on file for Mathew Duffey is (530) 913-5054.
What is Mathew Duffey's medical license number?
Mathew Duffey holds California license 156206.
What medical group is Mathew Duffey part of?
Mathew Duffey is linked to Sensible Care. Dmand AI links Mathew Duffey to 1 more medical group.
How long has Mathew Duffey been practicing?
Mathew Duffey graduated from medical school in 2019, 7 years ago.
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