Dr. John Nesemann, MD, MSc
- Hospital affiliations
- 1
- Industry payments
- $372
- Medical groups
- 3
- State license
- 1
- Year NPI issued
- 2022
- Practice address
- 513 Parnassus Ave # S357 #S357, San Francisco, CA 94143
- Practice phone
- Call (415) 353-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave)
Multi-specialty group site · San Francisco, California
Find Dr. Nesemann'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 Nesemann is an ophthalmologist in San Francisco, California
Dr. Nesemann practices at University Of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave) in San Francisco, California.
Dr. Nesemann's NPI, 1124777586, was assigned on March 22, 2022. Dr. Nesemann holds California license A189201.
- NPI
- 1124777586NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8628416112
- NPI enumeration date
- March 22, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 353-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Nesemann practices at University of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave) in San Francisco, California
Dr. Nesemann's primary practice is University of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave), at 513 Parnassus Ave # S357 #S357, San Francisco, CA 94143. The practice phone is (415) 353-3000.
- University of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave)513 Parnassus Ave # S357 #S357, San Francisco, CA 94143Phone(415) 353-3000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Nesemann is affiliated with 3 sites of care and 3 medical groups
Dr. Nesemann's primary practice is University Of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave) in San Francisco, California. Dr. Nesemann is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Nesemann to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John Nesemann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nesemann practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave) | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Nesemann is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Nesemann's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Nesemann is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Ophthalmologists near Dr. Nesemann
Counts of ophthalmologists 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
How Dr. John Nesemann takes part in Medicare
Dr. Nesemann 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)
Dr. John Nesemann received $372 in industry payments from 2024 to 2025
CMS Open Payments shows 3 general payments to Dr. Nesemann from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $245.
General payments to Dr. Nesemann by program year, 2024 to 2025
Companies that paid Dr. Nesemann the most, 2024 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 Nesemann'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (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) |
| 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 Nesemann
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 Nesemann's NPI number?
Dr. John Nesemann's NPI number is 1124777586. It was assigned on March 22, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. John Nesemann?
Dr. John Nesemann is an ophthalmologist in San Francisco, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Nesemann practice?
Dr. Nesemann practices at 513 Parnassus Ave # S357 #S357, San Francisco, CA 94143. Dr. Nesemann's primary practice is University Of California San Francisco - Anesthesia & Pain - San Francisco (513 Parnassus Ave) in San Francisco, California. Dmand AI also links Dr. Nesemann to 2 medical groups and 1 group practice or clinic.
What is Dr. John Nesemann's office phone number?
The practice phone on file for Dr. Nesemann is (415) 353-3000.
What is Dr. John Nesemann's medical license number?
Dr. Nesemann holds California license A189201, one of 2 state licenses on file.
Which hospitals is Dr. John Nesemann affiliated with?
Dr. Nesemann is affiliated with UCSF Helen Diller Medical Center at Parnassus Heights.
What medical group is Dr. John Nesemann part of?
Dr. Nesemann is linked to UCSF Pediatrics. Dmand AI links Dr. Nesemann to 2 more medical groups.
Does Dr. John Nesemann accept Medicare?
Yes. CMS lists Dr. Nesemann as accepting Medicare assignment.
Has Dr. John Nesemann received payments from drug or device companies?
CMS Open Payments shows $372 in general payments to Dr. Nesemann from 2 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Dr. John Nesemann been practicing?
Dr. Nesemann's NPI was assigned in 2022.
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