Dr. John V. Fahy, MD
- Medicare services, 2024
- 63
- Medicare patients, 2024
- 51
- Part D claims, 2024
- 355
- MIPS score, 2024
- 85
- Hospital affiliations
- 1
- 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 Dr. Fahy'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. John V. Fahy is an internist in San Francisco, California
Dr. Fahy practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
Dr. Fahy's NPI, 1295789550, was assigned on May 20, 2006. Dr. Fahy holds California license A53767.
- NPI
- 1295789550NPI Registry (opens in a new tab)
- NPI enumeration date
- May 20, 2006
- NPI status
- Active
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John V. Fahy practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
Dr. Fahy'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
Dr. John V. Fahy is affiliated with 5 sites of care and 5 medical groups
Dr. Fahy'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 UCSF Pediatrics. Dmand AI also links Dr. Fahy to 4 more group practices and clinics and 4 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 Dr. John V. Fahy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fahy practices, 5 sites in all. 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 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John V. Fahy is one of 16,751 internists in California
Internal medicine is Dr. Fahy's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Fahy is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Fahy
Counts of internists 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. John V. Fahy billed Medicare for 63 services in 2024
CMS data shows 63 Medicare services from Dr. Fahy across 2 procedure codes in 2024, all of them office visits, for 51 Medicare patients. Medicare paid $6,619 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Fahy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 912024: 6331%
Dr. Fahy compared with the California median for internists, 2024
- Dr. Fahy
- California median
- Medicare services
- 63vs 36183% below
- Medicare patients
- 51vs 15166% below
- Part D claims
- 254vs 42140% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Fahy'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. John V. Fahy treated 51 Medicare patients in 2024, average age 75
CMS counts 51 Medicare patients who saw Dr. Fahy in 2024. The largest group is 75 to 84, with 21 patients. 75% of them have asthma, and 75% have high blood pressure. 22% are also on Medicaid. Their average risk score is 1.55, 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. Fahy's median patient age at 72, with 44% women.
Dr. Fahy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Fahy's Medicare patients by sex, 2024
- Women3059%
- Men2141%
Chronic conditions among Dr. Fahy's Medicare patients, 2024
- Asthma75%
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- COPD47%
- Ischemic heart disease37%
- Heart failure33%
- Diabetes27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fahy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women44%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John V. Fahy wrote 355 Medicare Part D claims in 2024
In 2024, Dr. Fahy wrote 355 Medicare Part D claims for 50 patients. 22% of them were for generic drugs. CMS names the drug for 254 of them, across 12 drugs with 11 or more claims each, at $510,913 in total drug cost. In 2023, CMS named 275 claims across 15 drugs.
Dr. Fahy's Part D claims by kind of drug, 2024
- Generic78 claims22%
- Brand-name277 claims78%
Dr. Fahy'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. Fahy's Part D claims, 2024
- Antibiotics4%13 of 355 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: 2752024: 2548%
Drugs named by CMS: 12 in 2024, 15 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
Dr. John V. Fahy scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Fahy for performance year 2024, reported as part of a group.
Dr. Fahy's MIPS scores, performance year 2024
- 85of 100Final score
- 81.1of 100Quality
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John V. Fahy received $82,788 in industry payments from 2016 to 2025
CMS Open Payments shows 43 general payments to Dr. Fahy from 9 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 62% of the total. Pfizer Inc. paid the most, $36,360.
General payments to Dr. Fahy by program year, 2016 to 2025
General payments to Dr. Fahy by kind, 2016 to 2025
- Consulting fees$51,45462%
- Travel and lodging$29,78436%
- Food and beverage$1,5242%
- Education$250%
Companies that paid Dr. Fahy the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John V. Fahy'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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 Dr. John V. Fahy
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. John V. Fahy's NPI number?
Dr. John V. Fahy's NPI number is 1295789550. It was assigned on May 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John V. Fahy?
Dr. John V. Fahy is an internist in San Francisco, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John V. Fahy practice?
Dr. Fahy practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Fahy'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 Dr. Fahy to 4 group practices and clinics and 4 medical groups.
What is Dr. John V. Fahy's office phone number?
The practice phone on file for Dr. Fahy is (415) 353-2733.
What is Dr. John V. Fahy's medical license number?
Dr. Fahy holds California license A53767.
Which hospitals is Dr. John V. Fahy affiliated with?
Dr. Fahy practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California.
What medical group is Dr. John V. Fahy part of?
Dr. Fahy is linked to UCSF Pediatrics. Dmand AI links Dr. Fahy to 4 more medical groups.
Does Dr. John V. Fahy accept Medicare?
Yes. CMS data shows Dr. Fahy billed Medicare for 63 services in 2024.
What is Dr. John V. Fahy's MIPS score?
Dr. Fahy's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Dr. John V. Fahy see?
CMS counts 51 Medicare patients who saw Dr. Fahy in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. John V. Fahy bill to Medicare?
In 2024, Dr. Fahy's most billed Medicare services were office visit, established patient (99215) and office visit, established patient (99214).
What drugs does Dr. John V. Fahy prescribe most?
In 2024 Medicare Part D data, Dr. Fahy's most prescribed drugs by claims were Dupixent Pen, Trelegy Ellipta and Albuterol Sulfate Hfa.
Has Dr. John V. Fahy received payments from drug or device companies?
CMS Open Payments shows $82,788 in general payments to Dr. Fahy from 9 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. John V. Fahy been practicing?
Dr. Fahy graduated from medical school in 1985, 41 years ago.
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