Dr. Ralph Christian Fenn, MD, PhD
- Medicare services, 2024
- 108
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 308
- Industry payments
- $29
- State licenses
- 3
- Practice address
- 1635 Divisadero St, San Francisco, CA 94115
- Practice phone
- Call (415) 379-0094
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Fenn's professional email, personal email and mobile number
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Dr. Ralph Christian Fenn is a psychiatrist in San Francisco, California
Dr. Fenn practices in San Francisco, California.
Dr. Fenn's NPI, 1659564201, was assigned on August 27, 2007. Dr. Fenn graduated from University Of Michigan Medical School in 2000. Dr. Fenn holds California license A79192.
- NPI
- 1659564201NPI Registry (opens in a new tab)
- NPI enumeration date
- August 27, 2007
- NPI status
- Active
- Practice phone
- (415) 379-0094
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Ralph Christian Fenn's practice address is in San Francisco, California
Dr. Fenn's practice address in the NPI Registry is 1635 Divisadero St, San Francisco, CA 94115, in San Francisco County. The practice phone is (415) 379-0094.
- NPI Registry address1635 Divisadero St, San Francisco, CA 94115 · San Francisco CountyPhone(415) 379-0094
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Ralph Christian Fenn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fenn practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Fenn's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ralph Christian Fenn is one of 6,803 psychiatrists in California
Psychiatry is Dr. Fenn's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Fenn's licenses on file in 3 states: California, Nevada and Michigan.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Nevada license
- Michigan license
Clinical focus
Dmand AI lists depression and schizophrenia among the conditions Dr. Fenn treats.
Psychiatrists near Dr. Fenn
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. Ralph Christian Fenn billed Medicare for 108 services in 2024
CMS data shows 108 Medicare services from Dr. Fenn across 2 procedure codes in 2024, for 21 Medicare patients. Medicare paid $7,454 for them. Every service was in an office.
Dr. Fenn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 02024: 68
- Office and hospital visits
- 2023: 512024: 4022%
Dr. Fenn compared with the California median for psychiatrists, 2024
- Dr. Fenn
- California median
- Medicare services
- 108vs 1199% below
- Medicare patients
- 21vs 4149% below
- Part D claims
- 191vs 14433% above
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Fenn's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ralph Christian Fenn treated 21 Medicare patients in 2024, average age 75
CMS counts 21 Medicare patients who saw Dr. Fenn in 2024. 71% of them have schizophrenia and other psychoses, and 62% have high cholesterol. Their average risk score is 2.45, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Fenn's median patient age at 55, with 0% women.
Chronic conditions among Dr. Fenn's Medicare patients, 2024
- Schizophrenia and other psychoses71%
- High cholesterol62%
- Mood disorders62%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fenn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women0%
- Men100%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ralph Christian Fenn wrote 308 Medicare Part D claims in 2024
In 2024, Dr. Fenn wrote 308 Medicare Part D claims for 24 patients. 88% of them were for generic drugs. CMS names the drug for 191 of them, across 11 drugs with 11 or more claims each, at $119,058 in total drug cost. In 2023, CMS named 786 claims across 23 drugs.
Dr. Fenn's Part D claims by kind of drug, 2024
- Generic272 claims88%
- Brand-name36 claims12%
Dr. Fenn'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. Fenn's Part D claims, 2024
- Antipsychotics, patients 65 and over28%86 of 308 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: 7862024: 19176%
Drugs named by CMS: 11 in 2024, 23 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. Ralph Christian Fenn received $29 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Fenn from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $29.
Companies that paid Dr. Fenn the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ralph Christian Fenn graduated from University Of Michigan Medical School
Dr. Fenn graduated from University Of Michigan Medical School in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ralph Christian Fenn'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 |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (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 Dr. Ralph Christian Fenn
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. Ralph Christian Fenn's NPI number?
Dr. Ralph Christian Fenn's NPI number is 1659564201. It was assigned on August 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ralph Christian Fenn?
Dr. Ralph Christian Fenn is a psychiatrist in San Francisco, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Ralph Christian Fenn practice?
Dr. Fenn practices at 1635 Divisadero St, San Francisco, CA 94115.
What is Dr. Ralph Christian Fenn's office phone number?
The practice phone on file for Dr. Fenn is (415) 379-0094.
What is Dr. Ralph Christian Fenn's medical license number?
Dr. Fenn holds California license A79192, one of the licenses on file in 3 states.
Which states has Dr. Ralph Christian Fenn been licensed in?
Dmand AI has state licenses on file for Dr. Fenn in California (2002 to 2026), Nevada (2005 to 2007) and Michigan (2004 to 2005).
Does Dr. Ralph Christian Fenn accept Medicare?
Yes. CMS data shows Dr. Fenn billed Medicare for 108 services in 2024.
How many Medicare patients does Dr. Ralph Christian Fenn see?
CMS counts 21 Medicare patients who saw Dr. Fenn in 2024, with an average age of 75.
What services does Dr. Ralph Christian Fenn bill to Medicare?
In 2024, Dr. Fenn's most billed Medicare services were medicare service (G2212) and office visit, established patient (99215).
Where did Dr. Ralph Christian Fenn go to medical school?
Dr. Fenn graduated from University Of Michigan Medical School in 2000.
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What drugs does Dr. Ralph Christian Fenn prescribe most?
In 2024 Medicare Part D data, Dr. Fenn's most prescribed drugs by claims were Clonazepam, Escitalopram Oxalate and Quetiapine Fumarate.
Has Dr. Ralph Christian Fenn received payments from drug or device companies?
CMS Open Payments shows $29 in general payments to Dr. Fenn from 1 company from 2024 to 2024. The largest total came from ViiV Healthcare Company.
How long has Dr. Ralph Christian Fenn been practicing?
Dr. Fenn graduated from medical school in 2000, 26 years ago.
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