Dr. Roger A. Siouffey, MD
- Part D claims, 2024
- 637
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 1777 W Yosemite Ave, Manteca, CA 95337
- Practice phone
- Call (209) 825-3700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente - Manteca Medical Center
Manteca, California
Find Dr. Siouffey'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. Roger A. Siouffey is a psychiatrist in Manteca, California
Dr. Siouffey practices at Kaiser Permanente - Manteca Medical Center in Manteca, California.
Dr. Siouffey's NPI, 1497833396, was assigned on November 1, 2006. Dr. Siouffey graduated from Damascus University Faculty of Medicine in 1979. Dr. Siouffey holds California license C43113.
- NPI
- 1497833396NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Practice phone
- (209) 825-3700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Roger A. Siouffey practices at Kaiser Permanente - Manteca Medical Center in Manteca, California
Dr. Siouffey's primary practice is Kaiser Permanente - Manteca Medical Center, at 1777 W Yosemite Ave, Manteca, CA 95337 in San Joaquin County. The practice phone is (209) 825-3700.
- Kaiser Permanente - Manteca Medical Center1777 W Yosemite Ave, Manteca, CA 95337 · San Joaquin CountyPhone(209) 825-3700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Roger A. Siouffey is affiliated with 2 sites of care and 1 medical group
Dr. Siouffey's primary practice is Kaiser Permanente - Manteca Medical Center in Manteca, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Siouffey 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. Roger A. Siouffey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siouffey practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente - Manteca Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roger A. Siouffey is one of 6,803 psychiatrists in California
Psychiatry is Dr. Siouffey's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Siouffey is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Siouffey's licenses on file in 2 states: California and New York.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- New York license
Clinical focus
Dmand AI lists adjustment disease, anxiety, bipolar disorder and schizophrenia among the conditions Dr. Siouffey treats.
Psychiatrists near Dr. Siouffey
Counts of psychiatrists 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. Roger A. Siouffey wrote 637 Medicare Part D claims in 2024
In 2024, Dr. Siouffey wrote 637 Medicare Part D claims for 206 patients. 99% of them were for generic drugs. CMS names the drug for 532 of them, across 17 drugs with 11 or more claims each, at $9,970 in total drug cost. In 2023, CMS named 1,994 claims across 29 drugs.
Dr. Siouffey's Part D claims by kind of drug, 2024
- Generic629 claims99%
- Brand-name and other8 claims1%
Dr. Siouffey'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. Siouffey's Part D claims, 2024
- Antipsychotics, patients 65 and over5%29 of 637 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: 1,9942024: 53273%
Drugs named by CMS: 17 in 2024, 29 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
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Dr. Roger A. Siouffey has 1 award and honors on record
Dmand AI lists 1 award for Dr. Siouffey, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Siouffey
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Roger A. Siouffey graduated from Damascus University Faculty of Medicine
Dr. Siouffey graduated from Damascus University Faculty of Medicine in 1979.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Sources for Dr. Roger A. Siouffey'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 |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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 Dr. Roger A. Siouffey
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. Roger A. Siouffey's NPI number?
Dr. Roger A. Siouffey's NPI number is 1497833396. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roger A. Siouffey?
Dr. Roger A. Siouffey is a psychiatrist in Manteca, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Roger A. Siouffey practice?
Dr. Siouffey practices at 1777 W Yosemite Ave, Manteca, CA 95337. Dr. Siouffey's primary practice is Kaiser Permanente - Manteca Medical Center in Manteca, California. Dmand AI also links Dr. Siouffey to 1 group practice or clinic.
What is Dr. Roger A. Siouffey's office phone number?
The practice phone on file for Dr. Siouffey is (209) 825-3700.
What is Dr. Roger A. Siouffey's medical license number?
Dr. Siouffey holds California license C43113, one of the licenses on file in 2 states.
Which states has Dr. Roger A. Siouffey been licensed in?
Dmand AI has state licenses on file for Dr. Siouffey in California (1993 to 2026) and New York (since 1987).
What medical group is Dr. Roger A. Siouffey part of?
Dr. Siouffey is linked to The Permanente Medical Group, Inc.
Is Dr. Roger A. Siouffey board certified?
Yes. Dr. Siouffey is board certified in psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Roger A. Siouffey go to medical school?
Dr. Siouffey graduated from Damascus University Faculty of Medicine in 1979.
What drugs does Dr. Roger A. Siouffey prescribe most?
In 2024 Medicare Part D data, Dr. Siouffey's most prescribed drugs by claims were Trazodone HCl, Fluoxetine HCl and Sertraline HCl.
How long has Dr. Roger A. Siouffey been practicing?
Dr. Siouffey graduated from medical school in 1979, 47 years ago.
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