Psychosomatics
Adaptation, PsychologicalNarcissismPain, Intractable
Dr. Peter Russell Knudsen, MD
NPI1326276585PAC ID6406076132
- Part D claims, 2024
- 157
- Publications
- 3
- Hospital affiliations
- 1
- Industry payments
- $12
- Medical group
- 1
- Practice address
- 8001 Bruceville Road, Sacramento, CA 95823
- Practice phone
- Call (916) 423-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Peter Russell Knudsen is a psychiatrist in Sacramento, California
Dr. Knudsen practices at Sierra Vista Hospital in Sacramento, California, part of Universal Health Services.
Dr. Knudsen's NPI, 1326276585, was assigned on June 26, 2009. Dr. Knudsen graduated from UC Davis School of Medicine in 2010. Dr. Knudsen's California license number on file is A118509.
NPI and contact details
- NPI
- 1326276585NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406076132
- NPI enumeration date
- June 26, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 423-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter Russell Knudsen practices at Sierra Vista Hospital in Sacramento, California
Dr. Knudsen's primary practice is Sierra Vista Hospital, at 8001 Bruceville Road, Sacramento, CA 95823 in Sacramento County. The practice phone is (916) 423-2000.
- Sierra Vista Hospital8001 Bruceville Road, Sacramento, CA 95823 · Sacramento CountyPhone(916) 423-2000
Source: Dmand AI Affiliation Data
Dr. Peter Russell Knudsen is affiliated with 2 sites of care and 1 medical group
Dr. Knudsen's primary practice is Sierra Vista Hospital in Sacramento, California, part of Universal Health Services. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Knudsen to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter Russell Knudsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knudsen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sierra Vista Hospital | 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. Peter Russell Knudsen is one of 6,803 psychiatrists in California
Psychiatry is Dr. Knudsen's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Knudsen is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dr. Knudsen has a license on file in California.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
Clinical focus
Dmand AI lists psychoses among the conditions Dr. Knudsen treats.
Psychiatrists near Dr. Knudsen
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
6,803psychiatrists in California282psychiatrists in Sacramento10psychiatrists at Sierra Vista Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Peter Russell Knudsen's patients have a median age of 38
Across all payers, Dmand AI patient panel data puts Dr. Knudsen's median patient age at 38, with 58% women.
Dr. Knudsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Peter Russell Knudsen wrote 157 Medicare Part D claims in 2024
In 2024, Dr. Knudsen wrote 157 Medicare Part D claims for 32 patients. 92% of them were for generic drugs. CMS names the drug for 50 of them, across 4 drugs with 11 or more claims each, at $584 in total drug cost. In 2022, CMS named 55 claims across 4 drugs.
Part D claims, 2024157
Drugs named by CMS4
Total drug cost$584
Part D patients32
Dr. Knudsen's Part D claims by kind of drug, 2024
- Generic145 claims92%
- Brand-name and other12 claims8%
Dr. Knudsen's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 552023: 509%
Drugs named by CMS: 4 in 2023, 4 in 2022.
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
How Dr. Peter Russell Knudsen takes part in Medicare
Dr. Knudsen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Peter Russell Knudsen has 3 publications on record
Dmand AI links 3 papers to Dr. Knudsen in 2012. Dr. Knudsen's most frequent co-authors are James Alan Bourgeois, MD and Lorin Michael Scher, MD.
Papers3
Dr. Knudsen's most frequent co-authors
Recent publications by Dr. Knudsen
See who Dr. Knudsen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Knudsen works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Peter Russell Knudsen received $12 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Knudsen from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $12.
Companies that paid Dr. Knudsen the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter Russell Knudsen graduated from UC Davis School of Medicine
Dr. Knudsen graduated from UC Davis School of Medicine in 2010.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Peter Russell Knudsen accepts plans from 1 insurance carrier
Dr. Knudsen is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Knudsen accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Peter Russell Knudsen'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Peter Russell Knudsen
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. Peter Russell Knudsen's NPI number?
Dr. Peter Russell Knudsen's NPI number is 1326276585. It was assigned on June 26, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter Russell Knudsen?
Dr. Peter Russell Knudsen is a psychiatrist in Sacramento, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Peter Russell Knudsen practice?
Dr. Knudsen practices at 8001 Bruceville Road, Sacramento, CA 95823. Dr. Knudsen's primary practice is Sierra Vista Hospital in Sacramento, California, part of Universal Health Services. Dmand AI also links Dr. Knudsen to 1 group practice or clinic.
What is Dr. Peter Russell Knudsen's office phone number?
The practice phone on file for Dr. Knudsen is (916) 423-2000.
What is Dr. Peter Russell Knudsen's medical license number?
Dr. Knudsen's California license number on file is A118509.
Which hospitals is Dr. Peter Russell Knudsen affiliated with?
Dr. Knudsen practices at Sierra Vista Hospital in Sacramento, California.
What medical group is Dr. Peter Russell Knudsen part of?
Dr. Knudsen is linked to The Permanente Medical Group, Inc.
Does Dr. Peter Russell Knudsen accept Medicare?
Yes. CMS lists Dr. Knudsen as accepting Medicare assignment.
Is Dr. Peter Russell Knudsen board certified?
Yes. Dr. Knudsen is board certified in psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Peter Russell Knudsen go to medical school?
Dr. Knudsen graduated from UC Davis School of Medicine in 2010.
Show 6 more questionsShow fewer questions
What drugs does Dr. Peter Russell Knudsen prescribe most?
In 2023 Medicare Part D data, Dr. Knudsen's most prescribed drugs by claims were Risperidone, Trazodone HCl and Atorvastatin Calcium.
Has Dr. Peter Russell Knudsen received payments from drug or device companies?
CMS Open Payments shows $12 in general payments to Dr. Knudsen from 1 company from 2019 to 2019. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Peter Russell Knudsen been practicing?
Dr. Knudsen graduated from medical school in 2010, 16 years ago.
Does Dr. Peter Russell Knudsen do research?
Dmand AI links 3 publications to Dr. Knudsen.
Who does Dr. Peter Russell Knudsen publish with?
Dr. Knudsen's most frequent co-authors are James Alan Bourgeois, MD (1 shared paper) and Lorin Michael Scher, MD (1 shared paper).
What insurance does Dr. Peter Russell Knudsen accept?
Dr. Knudsen is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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